Search tips
Search criteria

Results 1-3 (3)

Clipboard (0)
more »
Year of Publication
Document Types
1.  In Vivo High-Frequency Contrast-Enhanced Ultrasonography of Choroidal Melanoma in Rabbits: Imaging Features and Histopathologic Correlations 
The British journal of ophthalmology  2013;97(7):10.1136/bjophthalmol-2013-303343.
To evaluate the utility of in vivo imaging of rabbit model of choroidal melanoma utilizing high-frequency contrast-enhanced ultrasound (HF-CE-US) with 2-or 3-dimensional modes, and to correlate the sonographic findings with histopathologic characteristics.
Five New Zealand white rabbits which were immunosuppressed with daily cyclosporin A were inoculated into their right eyes with aliquots of 1.5×106 / 50 µL of 92.1 human uveal melanoma cells cultured in RPMI. At week 4, the tumor-bearing eyes were imaged using high-frequency ultrasound with microbubble contrast agent to determine the 2-dimensional tumor size and relative blood volume and by 3-dimensional mode to determine tumor volume. Histologic tumor burden was quantified in enucleated eyes by ImageJ software, and microvascular density (MVD) was determined by counting vascular channels in PAS without hematoxylin sections.
Utilizing HF-CE-US, melanomas were visualized as relatively hyperechoic regions in the images. The correlation coefficients of sonographic size or volume compared with histologic area were 0.72 and 0.70, respectively. The sonographic tumor relative blood volume correlated with the histologic tumor vascularity (R2=0.92, P=0.04)
There is a positive correlation between in vivo sonographic tumor volume/size and histologic tumor size in our rabbit choroidal melanoma model. HF-CE-US corresponds to microvascular density and blood volume.
PMCID: PMC3863377  PMID: 23645822
2.  Diffuse Large B-Cell Lymphoma of the Eyelid in a Patient with Acquired Immunodeficiency Syndrome 
A 49-year-old man was evaluated for rapidly enlarging left lower eyelid and left neck masses. Biopsies of the masses showed diffuse large B-cell lymphoma (DLBCL). He tested positive for Human Immunodeficiency Virus (HIV). The patient was treated with chemotherapy and antiretroviral therapy, and the masses reduced in size.
PMCID: PMC3032002  PMID: 20675727
Acquired Immunodeficiency Syndrome; Diffuse Large B-Cell Lymphoma; Rituximab; c-Myc Gene; Eyelids; Orbit
3.  Serum VEGF Levels Correlate with Number and Location of Micrometastases in a Murine Model of Uveal Melanoma 
A preliminary animal study was performed to determine if hepatic micrometastases from uveal melanoma secrete vascular endothelial growth factor (VEGF) that is measurable in serum.
We analyzed the serum of a C57Bl/6 mouse model of uveal melanoma at days 4, 7, 14 and 21 post-inoculation for VEGF levels. We compared the serum VEGF levels with the number and location of hepatic micrometastases and their respective expression of VEGF mRNA.
Serum VEGF levels rose after inoculation of C57Bl/6 mice eyes with B16LS9 cutaneous melanoma cells. Beginning on day 14 there was a statistically significant (p < 0.05) increase in VEGF levels, rising to an average peak level of 37.985 pg/mL at day 21. Peak serum VEGF levels correlated with the total number of hepatic micrometastases (R=0.444) and there was moderate correlation of peak VEGF serum levels with micrometastases in more hypoxic locations (R=0.572). VEGF mRNA expression by micrometastases was highest in the most hypoxic regions of the hepatic lobule.
Hepatic micrometastastic melanoma arising in a mouse model of ocular melanoma secretes VEGF. The number and location of the micrometastases correlate with serum VEGF levels.
PMCID: PMC3000446  PMID: 20819828

Results 1-3 (3)