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1.  Unilateral Measles-Associated Retrobulbar Optic Neuritis without Encephalitis: A Case Report and Literature Review 
Case Reports in Neurology  2010;2(3):128-132.
Optic neuritis (ON) is a rare neurological complication of measles infection. Little is known about measles-associated retrobulbar ON. Here, we report a distinct patient with unilateral retrobulbar ON due to measles infection. A 26-year-old woman developed maculopapular rash and Koplik spots. On the following 3 days, she noticed blurred vision in the left eye. A Goldmann visual field test showed inferior nasal quadrantanopsia in the left eye. Visual acuity was 20/20 in OD and 20/100 in OS. Pupillary size was 2.0 mm in the right eye and 4.0 mm in the left eye. Light reflexes were slightly sluggish in the left eye. Ophthalmoscopy showed mild pallor of the left optic disc. Central critical flicker fusion frequency (CFF) was 40.7 Hz in the right eye and 10.1 Hz in the left eye (normal =29.0). Visual evoked potentials showed that P100 latencies were delayed on the left side (133 ms). Brain and spinal cord MRI was normal. Orbital MRI displayed abnormal enhancement in the left optic nerve. Serum and cerebrospinal fluid IgG titers of anti-measles antibodies were increased. Left measles-associated ON was diagnosed. Methylprednisolone pulse therapy followed by oral administration of prednisolone ameliorated visual acuity, visual field and CFF. The neuroophthalmic profile of our patient indicated that measles infection triggered isolated retrobulbar ON, leading to unusual visual deficits. Thus, physicians should pay more attention to variable patterns of measles-associated ON.
PMCID: PMC2988846  PMID: 21113282
Measles virus; Optic nerve MRI; Quadrantanopsia; Retrobulbar optic neuritis
2.  Clinical profile and short-term outcomes of optic neuritis patients in India 
Indian Journal of Ophthalmology  2014;62(3):265-267.
To evaluate the clinical profile and short-term visual outcome of optic neuritis (ON) patients in India.
Materials and Methods:
In this prospective study carried out over a period of 3 years, 99 eyes of 83 ON patients were examined and followed up for 10.8 ± 8.2 months for type of presentation, recurrence rate, and visual outcome.
Mean age was 27.6 ± 8.8 years. Female preponderance was seen (70% of cases). Papillitis (53.5% of eyes) was more common than retrobulbar neuritis (46.5% of eyes). Bilateral presentation was seen in 19.3% cases. Baseline median logMAR visual acuity (VA) was 1.6 ± 0.8, which improved to 0.2 ± 0.6, with approximately 64% of eyes retaining VA of 20/40 or more. Two patients had previous diagnosis of multiple sclerosis (MS). MS was newly diagnosed in two patients. Recurrence was seen in 16% of eyes and was more common in cases of retrobulbar neuritis.
The clinical profile of ON in Indian patients is different from that in the Western population. Unlike reported in the Western literature, papillitis is frequent in the Indian setup, with lower recurrence rates but poorer outcomes.
PMCID: PMC4061659  PMID: 24722269
Clinical profile; Indian population; optic neuritis treatment trial; optic neuritis
3.  Relationship between Optical Coherence Tomography and Electrophysiology of the Visual Pathway in Non-Optic Neuritis Eyes of Multiple Sclerosis Patients 
PLoS ONE  2014;9(8):e102546.
Loss of retinal ganglion cells in in non-optic neuritis eyes of Multiple Sclerosis patients (MS-NON) has recently been demonstrated. However, the pathological basis of this loss at present is not clear. Therefore, the aim of the current study was to investigate associations of clinical (high and low contrast visual acuity) and electrophysiological (electroretinogram and multifocal Visual Evoked Potentials) measures of the visual pathway with neuronal and axonal loss of RGC in order to better understand the nature of this loss.
Sixty-two patients with relapsing remitting multiple sclerosis with no previous history of optic neuritis in at least one eye were enrolled. All patients underwent a detailed ophthalmological examination in addition to low contrast visual acuity, Optical Coherence Tomography, full field electroretinogram (ERG) and multifocal visual evoked potentials (mfVEP).
There was significant reduction of ganglion cell layer thickness, and total and temporal retinal nerve fibre layer (RNFL) thickness (p<0.0001, 0.002 and 0.0002 respectively). Multifocal VEP also demonstrated significant amplitude reduction and latency delay (p<0.0001 for both). Ganglion cell layer thickness, total and temporal RNFL thickness inversely correlated with mfVEP latency (r = −0.48, p<0.0001 respectively; r = −0.53, p<0.0001 and r = −0.59, p<0.0001 respectively). Ganglion cell layer thickness, total and temporal RNFL thickness also inversely correlated with the photopic b-wave latency (r = −0.35, p = 0.01; r = −0.33, p = 0.025; r = −0.36, p = 0.008 respectively). Multivariate linear regression model demonstrated that while both factors were significantly associated with RGC axonal and neuronal loss, the estimated predictive power of the posterior visual pathway damage was considerably larger compare to retinal dysfunction.
The results of our study demonstrated significant association of RGC axonal and neuronal loss in NON-eyes of MS patients with both retinal dysfunction and post-chiasmal damage of the visual pathway.
PMCID: PMC4148263  PMID: 25166273
4.  Baseline Magnetic Resonance Imaging of the Optic Nerve Provides Limited Predictive Information on Short-Term Recovery after Acute Optic Neuritis 
PLoS ONE  2015;10(1):e0113961.
In acute optic neuritis, magnetic resonance imaging (MRI) may help to confirm the diagnosis as well as to exclude alternative diagnoses. Yet, little is known on the value of optic nerve imaging for predicting clinical symptoms or therapeutic outcome.
To evaluate the benefit of optic nerve MRI for predicting response to appropriate therapy and recovery of visual acuity.
Clinical data as well as visual evoked potentials (VEP) and MRI results of 104 patients, who were treated at the Department of Neurology with clinically definite optic neuritis between December 2010 and September 2012 were retrospectively reviewed including a follow up within 14 days.
Both length of the Gd enhancing lesion (r = -0.38; p = 0.001) and the T2 lesion (r = -0.25; p = 0.03) of the optic nerve in acute optic neuritis showed a medium correlation with visual acuity after treatment. Although visual acuity pre-treatment was little but nonsignificantly lower if Gd enhancement of the optic nerve was detected via orbital MRI, improvement of visual acuity after adequate therapy was significantly better (0.40 vs. 0.24; p = 0.04). Intraorbitally located Gd enhancing lesions were associated with worse visual improvement compared to canalicular, intracranial and chiasmal lesions (0.35 vs. 0.54; p = 0.02).
Orbital MRI is a broadly available, valuable tool for predicting the improvement of visual function. While the accurate individual prediction of long-term outcomes after appropriate therapy still remains difficult, lesion length of Gd enhancement and T2 lesion contribute to its prediction and a better short-term visual outcome may be associated with detection and localization of Gd enhancement along the optic nerve.
PMCID: PMC4312052  PMID: 25635863
5.  Hyperacute Corticosteroid Treatment of Optic Neuritis at the Onset of Pain May Prevent Visual Loss: A Case Series 
Aim. To show that high-dose corticosteroids may prevent visual loss in patients with optic neuritis (ON) treated at the prodromal, hyperacute, phase of retrobulbar pain. Method. Prospective case series: patients were recruited with a history of ON associated with pain. The patients were advised to report immediately to the investigators should the pain recur in either eye. Where possible, orbital magnetic resonance imaging (MRI) was performed to confirm a recurrence of ON and treatment with high-dose corticosteroids was commenced. Visual function and the patient's subjective account were monitored. Results. Eight patients (including cases of MS, CRION and NMO) presented in the hyperacute phase. MRI confirmed optic nerve inflammation in 5/5. Treatment was commenced immediately, and, in all cases, no visual loss ensued. Conclusion. MRI can be used to confirm acute optic neuritis prior to visual loss in the hyperacute phase. We suggest that treatment with high-dose corticosteroids may abort the attack and prevent loss of vision in patients with ON who are treated at the onset of pain. This has potential implications for the management of acute ON and also for our understanding of the pathogenesis and potential therapeutic targets in the neuroinflammatory conditions associated with ON.
PMCID: PMC3198616  PMID: 22096643
6.  A case report of adalimumab-associated optic neuritis 
To describe a case of retrobulbar optic neuritis that presented within 3 weeks of adalimumab treatment initiation.
This index case was evaluated with visual field testing, brain magnetic resonance imaging, lumbar puncture, and laboratory evaluation, and treated with intravenous methylprednisolone followed by a steroid taper.
Our patient made a full visual recovery, but was found to have extensive T2/FLAIR foci of hyperintensities that enhanced and had restricted diffusion on magnetic resonance imaging (MRI). Six months later, these demyelinating lesions still persisted and our patient was initiated on immunomodulatory treatment.
With the extensive burden of disease at presentation and persistence of lesions on follow-up MRI, this unusual case seems to suggest an unmasking of an underlying demyelinating process by adalimumab. The clinician should be mindful of this association and monitor for any manifestations and treat appropriately.
PMCID: PMC3438296  PMID: 22271346
Tumor necrosis factor; Optic neuritis; Multiple sclerosis; Adalimumab
7.  Early Onset Optic Neuritis Following Measles-Rubella Vaccination 
To report two cases of optic neuritis with onset less than 24 hours following measles-rubella (MR) vaccination.
Case Report
Two teenage patients developed acute optic neuritis 6 to 7 hours after MR booster vaccination. The first patient demonstrated bilateral papillitis and severe visual loss but improved significantly with pulse intravenous steroid therapy with methylprednisolone 500 mg/day. The second patient had unilateral retrobulbar optic neuritis and demonstrated excellent visual recovery without intervention.
Acute optic neuritis is a rare complication of MR vaccination and may occur early after immunization.
PMCID: PMC3589229  PMID: 23479534
8.  Subretinal angiostrongyliasis-induced optic neuritis 
A 27-year-old Thai male presented with progressive visual loss and a membrane-like floater in the right eye that had persisted for 1 month. He had a history of eating raw foods, including snails. His initial visual acuity was counting fingers at 1 ft and he had a relative afferent pupillary defect. A movable larva with subretinal tracks was found in the subretinal space near a normal optic disc. Visually evoked potentials showed delayed latency, which indicated secondary retrobulbar optic neuritis. A diode laser was directly applied to the motile worm. The patient was subsequently prescribed oral prednisolone and albendazole. After treatment, his visual acuity was slightly improved at 2/60. Ocular manifestation is a very rare event resulting from parasitic infection. In only 1.1% of angiostrongyliasis cases is an Angiostrongylus cantonensis larva identified in the eye. Ocular angiostrongyliasis with optic neuritis may be secondary to mechanical injury and/or inflammatory reactions. Steroid treatment is recommended, although most patients have only slight visual improvement after treatment.
PMCID: PMC3693582  PMID: 23818750
Angiostrongylus cantonensis; intraocular; ocular angiostrongyliasis; parasitic infection
9.  Experimental mouse model of optic neuritis with inflammatory demyelination produced by passive transfer of neuromyelitis optica-immunoglobulin G 
Although optic neuritis (ON) is a defining feature of neuromyelitis optica (NMO), appropriate animal models of NMO ON are lacking. Most NMO patients are seropositive for immunoglobulin G autoantibodies (NMO-IgG) against the astrocyte water channel aquaporin-4 (AQP4).
Several approaches were tested to develop a robust, passive-transfer mouse model of NMO ON, including NMO-IgG and complement delivery by: (i) retrobulbar infusion; (ii) intravitreal injection; (iii) a single intracranial injection near the optic chiasm; and (iv) 3-days continuous intracranial infusion near the optic chiasm.
Little ON or retinal pathology was seen using approaches (i) to (iii). Using approach (iv), however, optic nerves showed characteristic NMO pathology, with loss of AQP4 and glial fibrillary acidic protein immunoreactivity, granulocyte and macrophage infiltration, deposition of activated complement, demyelination and axonal injury. Even more extensive pathology was created in mice lacking complement inhibitor protein CD59, or using a genetically modified NMO-IgG with enhanced complement effector function, including significant loss of retinal ganglion cells. In control studies, optic nerve pathology was absent in treated AQP4-deficient mice, or in wild-type mice receiving control (non-NMO) IgG and complement.
Passive transfer of NMO-IgG and complement by continuous infusion near the optic chiasm in mice is sufficient to produce ON with characteristic NMO pathology. The mouse model of NMO ON should be useful in further studies of NMO pathogenesis mechanisms and therapeutics.
PMCID: PMC3909205  PMID: 24468108
NMO; Neuroinflammation; Mouse models; Aquaporin; Astrocyte
10.  Treatmenf of optic neuritis by retrobulbar injection of triamcinolone. 
British Medical Journal  1977;1(6075):1495-1497.
In a single-blind controlled clinical trial patients with optic neuritis caused by demyelination were given a single retrobulbar injection of triamcinolone. Though the treated group showed a trend towards more rapid recovery of vision than the controls, there was no significant difference in visual acuity, colour vision, or visual fields during the first six months after treatment. We conclude that routine use of corticosteroids is not justified in unilateral optic neuritis when vision in the other eye is good. Shortening the period of visual disability in bilateral disease or unilateral disease when vision in the other eye is poor, however, may be justifiable.
PMCID: PMC1607274  PMID: 326332
11.  Visual changes mediated by beer in retrobulbar neuritis--an investigative case report. 
A patient with established retrobulbar neuritis and Uhthoff's phenomenon who claimed that his visual acuity improved after drinking beer was assessed by detailed quantitative psychophysical tests. Studies of electrophysiological responses and biochemical levels of blood serum before and after drinking on several occasions were also made. The results of tests of contrast sensitivity, spectral sensitivity, flicker sensitivity, and visually evoked potential confirmed his observation. Some mechanisms for this phenomenon are considered.
PMCID: PMC1040939  PMID: 3947612
12.  Optic Neuritis and Retinal Ganglion Cell Loss in a Chronic Murine Model of Multiple Sclerosis 
Multiple sclerosis (MS) and its animal model experimental autoimmune encephalomyelitis (EAE) are neurodegenerative diseases with characteristic inflammatory demyelination in the central nervous system, including the optic nerve. Neuronal and axonal damage is considered to be the main cause of long-term disability in patients with MS. Neuronal loss, including retinal ganglion cell (RGC) apoptosis in eyes with optic neuritis (ON), also occurs in EAE. However, there is significant variability in the clinical course and level of neuronal damage in MS and EAE. The current studies examine the mechanisms and kinetics of RGC loss in C57/BL6 mice immunized with myelin oligodendrocyte glycoprotein to induce a chronic EAE disease. Clinical progression of EAE was scored daily and vision was assessed by optokinetic responses. At various time points, RGCs were counted and optic nerves were examined for inflammatory cell infiltration. Almost all EAE mice develop ON by day 15 post-immunization; however, RGC loss is delayed in these mice. No RGC loss is detected 25 days post-immunization, whereas RGC numbers in EAE mice significantly and progressively decrease compared to controls from 35 to 50 days post-immunization. The delayed time course of RGC loss is in stark contrast to that reported in relapsing EAE, as well as in rats with chronic EAE. Results suggest that different clinical disease courses of optic nerve inflammation may trigger distinct mechanisms of neuronal damage, or RGCs in different rodent strains may have variable resistance to neuronal degeneration.
PMCID: PMC3151613  PMID: 21852980
optic neuritis; multiple sclerosis; EAE; RGC; neurodegeneration
13.  Optic Neuritis Is Associated with Inner Nuclear Layer Thickening and Microcystic Macular Edema Independently of Multiple Sclerosis 
PLoS ONE  2013;8(8):e71145.
Microcystic macular edema (MME) and inner nuclear layer thickening (INL) were described in multiple sclerosis (MS) and neuromyelitis optica (NMO) patients using optical coherence tomography (OCT). The cause of these findings is currently unknown and a relation to inflammatory or degenerative processes in the optic nerve is discussed.
The aim of our study was to investigate whether INL thickening and MME are related to optic neuritis (ON) in various neuro-inflammatory disorders causingON: MS, NMO and chronic inflammatory optic neuropathy.
We retrospectively analyzed data from 216 MS patients, 39 patients with a clinically isolated syndrome, 20 NMO spectrum disorder patients, 9 patients with chronic inflammatory optic neuropathy and 121 healthy subjects. Intra-retinal layer segmentation was performed for the eyes of patients with unilateral ON. Scanning laser ophthalmoscopy (SLO) images were reviewed for characteristic ocular fundus changes.
Intra-retinal layer segmentation showed that eyes with a history of ON displayed MME independent INL thickening compared to contralateral eyes without previous ON. MME was detected in 22 eyes from 15 patients (5.3% of all screened patients), including 7 patients with bilateral edema. Of these, 21 had a prior history of ON (95%). The SLO images of all 22 MME-affected eyes showed crescent-shaped texture changes which were visible in the perifoveal region. A second grader who was blinded to the results of the OCT classified all SLO images for the presence of these characteristic fundus changes. All MME eyes were correctly classified (sensitivity = 100%) with high specificity (95.2%).
This study shows that both MME and INL thickening occur in various neuro-inflammatory disorders associated with ON. We also demonstrate that detection and analysis of MME by OCT is not limited to B-scans, but also possible using SLO images.
PMCID: PMC3735514  PMID: 23940706
14.  IgG immunoadsorption in experimental allergic neuritis: effect on antibody levels and clinical course. 
The effect of IgG immunoadsorption upon the course of chronic experimental allergic neuritis (EAN) is described. Miniature membrane plasma separators coupled with a Protein A (PA)-Sepharose immunoadsorbent column were used to perform upon conscious rabbits 5 IgG immunoadsorption treatments over 6 days. Quantitation of anti-myelin IgG and IgM by ELISA revealed that 55-65% of plasma IgG was removed per treatment. Rapid post-treatment antibody rebound was observed for anti-myelin IgG although no antibody overshoot above control levels could be observed. Anti-myelin IgM levels remained relatively unaffected by PA immunoadsorption. Comparisons of clinical scores between control and treatment animals showed that IgG immunoadsorption was significantly beneficial (day 1 post-treatment p less than 0.001; day 2 post-treatment p less than 0.05). However, rapid relapse was observed in all treatment animals such that by day 3 post-treatment no significant clinical difference between control and treatment groups could be observed. IgG immunoadsorption suppresses the clinical progression of chronic EAN in a manner similar to that seen with plasma exchange. This finding suggests that antibody modulates early disease pathogenesis.
PMCID: PMC1031934  PMID: 2671264
15.  Timing of Corticosteroid Therapy Is Critical to Prevent Retinal Ganglion Cell Loss in Experimental Optic Neuritis 
Corticosteroids currently used to treat optic neuritis can speed visual recovery but do not improve the final visual outcome that correlates with loss of retinal ganglion cells. These studies demonstrate that corticosteroids have the ability to prevent neuronal damage if treatment is initiated early in experimental optic neuritis, suggesting that immunosuppressive treatment protocols may be developed to prevent permanent vision loss after recurrent episodes of optic neuritis.
Acute vision loss from optic neuritis typically resolves; however, recovery is often not complete. Permanent vision loss from retinal ganglion cell (RGC) death occurs in 40% to 60% of patients. Current therapy (high-dose corticosteroids) speeds recovery but does not change final visual outcomes. Here the authors examined whether corticosteroids administered early in the disease course can prevent RGC loss in experimental optic neuritis.
RGCs were retrogradely labeled with fluorogold in SJL/J mice. Experimental autoimmune encephalomyelitis (EAE) was induced by immunization with proteolipid protein peptide. Optic neuritis began 9 days after immunization. Mice were treated daily with dexamethasone, methylprednisolone, or PBS from days 0 to 14 or days 10 to 14 and then were killed on day 14, 18, or 22.
Corticosteroid treatment initiated before optic neuritis onset (days 0–14) suppressed EAE and reduced optic neuritis incidence through day 14. In the few eyes that developed optic neuritis, inflammation was mild, and RGC loss was attenuated. After treatment was stopped on day 14, mice rapidly developed EAE and optic neuritis by day 18, but RGC loss was still reduced. By day 22, RGC loss increased to levels similar to those of untreated optic neuritis eyes. Corticosteroid treatment after optic neuritis onset (days 10–14) slowed EAE progression and showed a trend toward suppression of optic neuritis and RGC loss on day 14 that was lost by day 18.
Corticosteroids can suppress optic neuritis and prevent RGC loss if treatment is initiated before optic nerve inflammation onset. Treatment is less effective after inflammation begins. Results suggest that chronic immunomodulation may prevent recurrent optic neuritis and RGC damage.
PMCID: PMC2868414  PMID: 19892867
16.  AIDS and optic neuritis in a rhesus monkey infected with the R5 clade C SHIV-1157ipd3N4 
Journal of medical primatology  2010;39(5):356-360.
A Chinese rhesus macaque infected with the pathogenic CCR5-tropic clade C simian-human immunodeficiency virus, SHIV-1157ipd3N4, had persistent viremia, depletion of CD4+ T cells to <200 cells/μl, opportunistic infections, coagulopathy and gradual development of bilateral blindness. MRI revealed marked thickening of both optic nerves. Histopathological evaluation showed diffuse cellular infiltration at necropsy, and a focus of infected cells. This is the first report of CNS pathology following chronic infection with an obligate R5 SHIV.
PMCID: PMC3095218  PMID: 20412378
R5 SHIV; neuroAIDS; optic neuropathy
17.  Neuroprotective Effects of Recombinant T-cell Receptor Ligand in Autoimmune Optic Neuritis in HLA-DR2 Mice 
This study examined the neuroprotective effects of T-cell receptor ligand (RTL) on autoimmune optic neuritis in humanized HLA-DR3 mice. Such immunotherapy significantly suppressed inflammation, inhibited demyelination with signs of myelin recovery, and prevented axonal loss in the optic nerves.
Optic neuritis (ON) is a condition involving primary inflammation, demyelination, and axonal injury in the optic nerve and leads to apoptotic retinal ganglion cell (RGC) death, which contributes to the persistence of visual loss. Currently, ON has no effective treatment. The goal was to determine the effectiveness of immunotherapy with recombinant T-cell receptor ligand (RTL) in preventing ON in humanized HLA-DR2 transgenic mice.
Experimental autoimmune encephalomyelitis (EAE) was induced with myelin oligodendrocyte glycoprotein in humanized HLA-DR2 (DRβ1*1501) transgenic mice. Five consecutive doses of RTL342M were administrated at the onset of ON. The development of autoimmune ON was assessed by histopathology at different time points. The levels of myelin loss, axonal loss, and RGC damage were examined by immunofluorescence.
HLA-DR2 mice developed chronic ON 2 days before EAE characterized by progressive neurodegeneration in both organs. RTL342M significantly suppressed inflammation in the optic nerve and spinal cord and provided protection for at least 30 days. Examination of myelin loss showed a marked suppression of demyelination and an increase in myelin recovery in the optic nerve. Moreover, RTL342M treatment revealed a neuroprotective effect on optic nerve axons and RGCs in retinas at postimmunization (PI) day 62.
RTL342M suppressed clinical and histologic signs of EAE/ON by preventing the recruitment of inflammatory cells into the optic nerve and showed neuroprotective effects against ON. However, to achieve full therapeutic benefit, more doses may be needed. These findings suggest a possible clinical application of this novel class of T-cell-tolerizing drugs for patients with optic neuritis.
PMCID: PMC3292374  PMID: 22167100
18.  Tubercular neuritis: A new manifestation of an ancient disease 
The Australasian Medical Journal  2011;4(12):674-676.
A 25-year-old housewife presented with a burning sensation over both legs for the past 15 months, and fever with weight loss for the past six months. She had noticed a lump in her left breast one month ago. Examination revealed hyperaesthesia and allodynia over the lower limbs. Nerve conduction studies confirmed the presence of sensory neuropathy. Nerve biopsy was suggestive of a chronic axonopathy. Subsequently sputum as well as aspirate from the breast lump tested positive for acid fast bacilli. Treatment with anti-tubercular therapy resulted in full recovery. Peripheral neuropathy is a unique and unusual presentation of tuberculosis.
PMCID: PMC3413966  PMID: 22905042
peripheral neuropathy; disseminated tuberculosis; sensory polyneuropathy
19.  Directional diffusivity changes in the optic nerve and optic radiation in optic neuritis 
Li, M | Li, J | He, H | Wang, Z | Lv, B | Li, W | Hailla, N | Yan, F | Xian, J | Ai, L
The British Journal of Radiology  2011;84(1000):304-314.
Optic neuritis (ON) is defined as an inflammation of the optic nerve and provides a useful model for studying the effects of inflammatory demyelination of white matter. The aim of this study was to assess the diffusion changes in both the optic nerve and optic radiation in patients with acute and chronic ON using diffusion tensor (DT) MRI.
33 patients with idiopathic demyelinating optic neuritis (IDON) and 33 gender- and age-matched healthy controls were examined with DT-MRI and with T1 and T2 weighted MRI.
Compared with controls, both first-episode and recurrent patients with IDON in the acute stage showed significantly increased radial diffusivity (λ⊥) and decreased mean fractional anisotropy (FA) in the affected nerves. Reduced FA, increased λ⊥, mean diffusivity (MD) and axial diffusivity (λ∥) were determined in patients with subacute IDON. We found no significant difference in the directional diffusivity of optic radiation in patients whose disease had lasted less than 1 year compared with healthy controls. However, significant changes in the FA and λ⊥ of the optic radiation were detected in patients with disease duration of more than 1 year.
These results show the great potential and capacity of DT-MRI measures as useful biomarkers and indicators for the evaluation of myelin injury in the visual pathway.
PMCID: PMC3473480  PMID: 21415301
20.  Retinal Nerve Fibre Layer Thinning in Patients with Clinically Isolated Optic Neuritis and Early Treatment with Interferon-Beta 
PLoS ONE  2012;7(12):e51645.
Optic neuritis is associated with neurodegeneration leading to chronic impairment of visual functions.
This study investigated whether early treatment with interferon beta (IFN-β) slows retinal nerve fibre layer (RNFL) thinning in clinically isolated optic neuritis.
Twenty patients with optic neuritis and visual acuity decreased to ≤0.5 (decimal system) were included into this prospective, open-label, parallel group 4-month observation. After methylprednisolone pulse therapy, 10 patients received IFN-β from week 2 onwards. This group was compared to 10 patients free of any disease modifying treatment (DMT). The parameter of interest was change in RNFL thickness assessed at baseline and at weeks 4, 8, and 16. Changes in visual acuity, visual field, and visual evoked potentials (VEPs) served as additional outcome parameters.
RNFL thinning did not differ between the groups with a mean reduction of 9.80±2.80 µm in IFN-β-treated patients (±SD) vs. 12.44±5.79 µm in patients who did not receive DMT (baseline non-affected eye minus affected eye at week 16; p = 0.67, t-test, 95% confidence interval: −15.77 to 10.48). Parameters of visual function did not show any differences between the groups either.
In isolated optic neuritis, early IFN-β treatment did not influence RNFL thinning nor had it any effect on recovery of visual functions.
PMCID: PMC3521715  PMID: 23272128
21.  Chloramphenicol – not so innocuous: a case of optic neuritis 
BMJ Case Reports  2011;2011:bcr1020103434.
The authors present a case of optic neuritis in an adult patient who had been self-prescribing extraordinarily large dosages of chloramphenicol for chronic prostatitis over several years. The visual symptoms resolved upon cessation of the drug and prescription of B group vitamins. Chloramphenicol optic neuritis has not been described in the literature for over 20 years and previously predominantly in children with cystic fibrosis.
PMCID: PMC3062065  PMID: 22715256
22.  Perineural Mast Cells Are Specifically Enriched in Pancreatic Neuritis and Neuropathic Pain in Pancreatic Cancer and Chronic Pancreatitis 
PLoS ONE  2013;8(3):e60529.
Pancreatic neuritis is a histopathological hallmark of pancreatic neuropathy and correlates to abdominal neuropathic pain sensation in pancreatic adenocarcinoma (PCa) and chronic pancreatitis (CP). However, inflammatory cell subtypes that compose pancreatic neuritis and their correlation to the neuropathic pain syndrome in PCa and CP are yet unknown.
Inflammatory cells within pancreatic neuritis lesions of patients with PCa (n = 20) and CP (n = 20) were immunolabeled and colorimetrically quantified with the pan-leukocyte marker CD45, with CD68 (macrophages), CD8 (cytotoxic T-lymphocytes), CD4 (T-helper cells), CD20 (B-lymphocytes), NCL-PC (plasma cells), neutrophil elastase, PRG2 (eosinophils), anti-mast cell (MC) tryptase and correlated to pain sensation. Perineural mast cell subtypes were analyzed by double immunolabeling with MC chymase. Expression and neural immunoreactivity of protease-activated receptor type 1 (PAR-1) and type 2 (PAR-2) were analyzed in PCa and CP and correlated to pain status of the patients.
In PCa and CP, nerves were predominantly infiltrated by cytotoxic T-lymphocytes (PCa: 35% of all perineural inflammatory cells, CP: 33%), macrophages (PCa: 39%, CP: 33%) and MC (PCa: 21%, CP: 27%). In both entities, neuropathic pain sensation was associated with a specific increase of perineural MC (PCa without pain: 14% vs. PCa with pain: 31%; CP without pain: 19% vs. CP with pain: 34%), not affecting the frequency of other inflammatory cell subtypes. The vast majority of these MC contained MC chymase. PAR-1 and PAR-2 expression did not correlate to the pain sensation of PCa and CP patients.
Pancreatic neuritis in PC and CP is composed of cytotoxic T-lymphocytes, macrophages and MC. The specific enrichment of MC around intrapancreatic nerves in neuropathic pain due to PCa and CP suggests the presence of MC-induced visceral hypersensitivity in the pancreas. Therefore, pancreatic and enteric neuropathies seem to share a similar type of neuro-immune interaction in the generation of visceral pain.
PMCID: PMC3610867  PMID: 23555989
23.  Takayasu arteritis associated with ulcerative colitis and optic neuritis: first case in Korea 
Takayasu arteritis (TA) is a chronic vasculitis that affects the aortic arch and its primary branches. Ulcerative colitis (UC) is an inflammatory bowel disease of unknown etiology. Patients diagnosed with both TA and UC have rarely been reported. The pathogenesis of TA and UC is uncertain, but cell-mediated mechanisms play an important role in both diseases, and a genetic factor is thought to have an effect on the coincidence of these two diseases. We herein report a 38-year-old female with TA who had a history of UC with optic neuritis. We believe that this is the first case of the coexistence of TA and UC in Korea.
PMCID: PMC3712159  PMID: 23864809
Takayasu arteritis; Colitis, ulcerative; Optic neuritis
24.  Primary Sjögren's syndrome related optic neuritis 
To determine the clinical features, diagnosis and treatment of the primary Sjögren syndrome (SS) related optic neuritis.
The clinical data of 8 patients (12 eyes) with primary SS related optic neuritis were analyzed retrospectively.
Eight of 128 consecutive patients with optic neuritis resulted from varied causes fulfilled the diagnostic criteria for the primary SS. They presented initially with the signs and symptoms of non-specific optic neuritis, and 5 patients presenting without dryness showed a chronic inflammation of submandibular gland or parotid gland, and lymphocyte infiltration was demonstrated by labial gland biopsy in 2 patients. There were serum positive titers for anti-Sjögren syndrome A (SSA) in 7 patients and anti-Sjögren syndrome B (SSB) in 8 patients. Anti-aquaporin-4 (AQP4) antibody was negative in all the 8 patients. Both glucocorticoids and immunosuppressive agent were administered, and visual acuity elevated in 8 eyes (66.7%), 3 patients (37.5%) recurred in the follow-up.
Primary SS related optic neuritis is less common and easily misdiagnosed. The conventional therapies for optic neuritis could not control the recurrence.
PMCID: PMC3874534  PMID: 24392343
optic neuritis; primary Sjögren's syndrome; anti-aquaporin-4
25.  Systemic Sclerosis Presenting with Simultaneous Retinal Vasculitis in One Eye and Optic Neuritis in the other along with Severe Immune Haemolytic Anaemia 
Systemic Sclerosis (SSc) is a connective tissue disorder which involves multiple systems in a chronic progressive manner. Micro–angiopathic haemolytic anaemia is a distinguished feature of “scleroderma renal crisis”, which is manifested by severe hypertension, a rapidly progressing renal dysfunction and hyperreninaemia and is seen in patients with an early, diffuse form of the disease. A nervous system involvement is rare, though entrapment neuropathies have been reported. Who presented with a sequential loss of vision in both eyes; due to retinal vasculitis in right eye and optic nerve demyelination in the left eye. She also had severe Coombs’ negative haemolytic anaemia in absence of any renal dysfunction or hypertension. Both the ophthalmologic and the haematologic manifestations are very rare and both responded well to oral prednisolone therapy.
PMCID: PMC3919342  PMID: 24551698
Systemic sclerosis; Retinal vasculitis; Optic neuritis; Autoimmune haemolytic anaemia

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