Search tips
Search criteria 


Logo of bmjcrBMJ Case ReportsVisit this articleSubmit a manuscriptReceive email alertsContact usBMJ
BMJ Case Rep. 2010; 2010: bcr0320102839.
Published online 2010 October 28. doi:  10.1136/bcr.03.2010.2839
PMCID: PMC3029328
Other full case

Non-traumatic gas gangrene presenting as left buttock and thigh pain in a patient with metastatic non-small cell lung cancer


We report a case of Clostridium septicum myonecrosis in a patient with metastatic non-small cell lung cancer receiving palliative chemotherapy. This is a rare but important differential diagnosis in patients with known malignancy presenting with acute pain. It is critical that the diagnosis is considered and confirmed promptly due to rapid deterioration and a potentially fatal outcome in the absence of aggressive treatment.


Non-traumatic Clostridium septicum myonecrosis is a rare but serious complication of malignancy. Mortality can reach 100% within 24 h of presentation.1 Typically the initial symptom is severe localised pain several hours before any clinical manifestations arise on examination. In contrast, cases of Clostridium septicum myonecrosis in subjects with no comorbidities and with evidence of trauma have a good prognosis.2 A PubMed search identified 30 case reports concerning C septicum myonecrosis or gas gangrene published in English in the last 10 years. Twenty-three cases were related to malignancy and the most common associations were lower gastrointestinal carcinomas, leukaemias and lymphoproliferative diseases. In one case of fatal non-traumatic gas gangrene, a colonic carcinoma was diagnosed postmortem.3 Immunosuppressive treatments such as chemotherapy and radiotherapy have also been implicated.4 5 Other predisposing factors include diverticulitis, gastrointestinal surgery and AIDS.68

Case presentation

We present the case of a 60-year-old female smoker with a medical history of successfully treated ovarian carcinoma. In May 2006 she was diagnosed with a T2N0M0 stage Ib adenocarcinoma of the right lung and underwent a right upper lobectomy. In January 2007 new lung nodules were identified. These remained stable on subsequent CT scans. As the patient was not keen on further chemotherapy, an active monitoring policy was agreed. She noticed lumps around her umbilicus and back in January 2009 a repeat CT scan identified liver and skin metastasis. She remained well enough to receive a trial of palliative chemotherapy that month. She received her first cycle of palliative gemcitabine and carboplatin uneventfully, retaining a performance score of 1. However, a day prior to her second cycle of treatment she was admitted as an emergency with sudden onset of severe left leg and buttock pain which abruptly woke her from sleep. There was no history of recent trauma. Her general practitioner made a putative diagnosis of severe spinal root pain but due to concern regarding the possible development of cauda equina syndrome referred her for admission. On examination she was apyrexial, tachycardic at 100 bpm and hypotensive with a blood pressure of 80/40 mm Hg. The left thigh and buttock were extremely bruised on the posterior and lateral surfaces with diffuse crepitus over this area. Blood tests revealed haemoglobin 10.6 g/dl, white cell count 19.9×109/l, neutrophils 17.4×109/l, platelets 739×109/l, C reactive protein 510 mg/l, creatine kinase 7130 IU/l, urea 11.9 mmol/l and creatinine 216 μmol/l. Pelvic x-ray revealed extensive gas within the soft tissues consistent with necrotising fasciitis (figure 1). Surgical review confirmed the clinical diagnosis of gas gangrene after demonstration of significant gas excretion with no bleeding on aseptic incision into the left lateral thigh. The patient was unfit for extensive surgical debridement and was therefore managed conservatively with pain control and broad spectrum antibiotics.

Figure 1
Pelvic x-ray demonstrating extensive gas in the left leg and buttock soft tissue.

Outcome and follow-up

The patient died later that day. A postmortem was not requested. Blood cultures subsequently grew an anaerobic organism and C septicum was identified on prolonged culture. The positive culture and the symptoms and signs elicited allowed a diagnosis of non-traumatic C septicum myonecrosis.1 9 10


C septicum myonecrosis can present in a myriad of ways depending on the infected tissue site. Patients may present with chest pain, severe arm pain and non-specific symptoms of malaise and nausea.1113 Non-traumatic gas gangrene is usually associated with gastrointestinal, intra-abdominal and haematological malignancies.14 There have been only two previous cases occurring in patients with lung cancer, one patient with non-small cell lung cancer following combined modality therapy5 and a second patient with small cell lung cancer receiving etoposide chemotherapy.4 There are no published reports of gemcitabine and carboplatin associated with C septicum infection. Although our patient was not neutropenic, the chemotherapy may have altered functionality of immune cells, contributing to C septicum’s access to the bloodstream. C septicum is unique in respect to other clostridial group members. It is relatively aerotolerant, allowing multiplication in healthy muscle tissue, unlike Clostridium perfringens which requires tissue devoid of oxygen.15 This is almost certainly why C septicum is overwhelmingly found in non-traumatic scenarios.16 Unlike C perfringens which is a gut commensal, in humans C septicum is an opportunistic infection suggesting the need for relative immunosuppresion as a prerequisite for its presence.12 Fulminant myonecrosis induced by C Septicum relies on the production of a haemolytic, necrotising α-toxin which inhibits neutrophil recruitment to the infected region. This is reflected in histological tissue samples which are shown to be deficient in number and functionality of neutrophils.17 α-Toxin contributes to septic shock by increasing capillary permeability.18 Treatment has to consider the patient's premorbid condition. The mainstays remain surgical debridement with broad spectrum intravenous antibiotics. There is little evidence to support the use of hyperbaric oxygen therapy. Its role is probably limited in C Septicum infection as the organism is not fully dependent on an anaerobic environment.19 However, in theory it could help prevent further bacterial spread through the muscle and allow smaller resection margins.1 20 In many cases related to malignancy, major surgery may not be appropriate and therefore a palliative approach, focusing on pain control should be initiated as soon as the diagnosis is made. Both primary and secondary care physicians need to be aware of non-traumatic gas gangrene despite its rarity. Our case illustrates that potentially all cancer patients are susceptible to opportunistic infections such as C Septicum. This diagnosis should be considered in patients with known malignancy and inexplicable pain and palpation for crepitus is vital. More rapid diagnosis may allow more aggressive surgical management or rapid institution of good symptom control in the last hours of life.

Learning points

  • [triangle] Malignancy of all types potentially renders patients susceptible to opportunistic infections such as Clostridium septicum.
  • [triangle] Non-traumatic gas gangrene should be considered in patients with known malignancy with unexplainable pain symptoms in both primary and secondary care settings.
  • [triangle] More rapid diagnosis may improve survival or at least allow faster initiation of palliative care in the last hours of life
  • [triangle] When examining the patient it is important to consider palpating for crepitus in the area of severe pain.
  • [triangle] Survivors of non-traumatic gas gangrene should undergo investigation of the gastrointestinal tract to exclude an underlying gastrointestinal malignancy if a malignancy is not already known.


Competing interests None.

Patient consent Obtained


1. Stevens D, Bryant A. Clostridial myonecrosis 2009. UpToDate Version 17.1
2. Smith-Slatas CL, Bourque M, Salazar JC. Clostridium septicum infections in children: a case report and review of the literature. Pediatrics 2006;117:e796–805 [PubMed]
3. Delbridge MS, Turton EP, Kester RC. Spontaneous fulminant gas gangrene. Emerg Med J 2005;22:520–1 [PMC free article] [PubMed]
4. Smith D, Harris M, Thatcher N. Clostridial myonecrosis in association with etoposide therapy presenting as severe thigh pain. Postgrad Med J 1986;62:403–4 [PMC free article] [PubMed]
5. Velcheti V, Gilstrap E, Bradley J, et al. Radiation-induced myonecrosis presenting as a subcutaneous mass after combined modality therapy for non-small cell lung cancer. J Thorac Oncol 2007;2:875–6 [PubMed]
6. Stevens DL, Musher DM, Watson DA, et al. Spontaneous, nontraumatic gangrene due to Clostridium septicum. Rev Infect Dis 1990;12:286–96 [PubMed]
7. Johnson S, Driks MR, Tweten RK, et al. Clinical courses of seven survivors of Clostridium septicum infection and their immunologic responses to alpha toxin. Clin Infect Dis 1994;19:761–4 [PubMed]
8. Alpern RJ, Dowell VR., Jr Clostridium septicum infections and malignancy. JAMA 1969;209:385–8 [PubMed]
9. Yoder EL, Mendez J, Khatib R. Spontaneous gangrenous myositis induced by Streptococcus pyogenes: case report and review of the literature. Rev Infect Dis 1987;9:382–5 [PubMed]
10. Arteta-Bulos R, Karim SM. Images in clinical medicine. Nontraumatic Clostridium septicum myonecrosis. N Engl J Med 2004;351:e15. [PubMed]
11. Horner D, Brown G. An unusual cause of chest pain: atraumatic clostridial myonecrosis. Emerg Med J 2009;26:70–1 [PubMed]
12. Powell MJ, Sasapu KK, Macklin C. Metastatic Gas gangrene and Colonic Perforation: a case report. World J Emerg Surg 2008;28:15. [PMC free article] [PubMed]
13. Rai RK, Londhe S, Sinha S, et al. Spontaneous bifocal Clostridium septicum gas gangrene. J Bone Joint Surg Br 2001;83:115–6 [PubMed]
14. Kornbluth AA, Danzig JB, Bernstein LH. Clostridium septicum infection and associated malignancy. Report of 2 cases and review of the literature. Medicine (Baltimore) 1989;68:30–7 [PubMed]
15. Awad MM, Bryant AE, Stevens DL, et al. Virulence studies on chromosomal alpha-toxin and theta toxin mutants constructed by allelic exchange provide genetic evidence for the essential role of alpha-toxin in Clostridium perfringens-mediated gas gangrene. Mol Microbiol 1995;15:191–202 [PubMed]
16. Kirchner JT. Clostridium septicum infection: Beware of associated cancer. Postgrad Med 1991;90:157–60 [PubMed]
17. Kennedy CL, Krejany EO, Young LF, et al. The alpha-toxin of Clostridium septicum is essential for virulence. Mol Microbiol 2005;57:1357–66 [PubMed]
18. Pelfrey TM, Turk RP, Peoples JB, et al. Surgical aspects of Clostridium septicum septicemia. Arch Surg 1984;119:546–50 [PubMed]
19. Hill GB, Osterhout S. Experimental effects of hyperbaric oxygen on selected clostridial species. II. In-vivo studies in mice. J Infect Dis 1972;125:26–35 [PubMed]
20. Leach RM, Rees PJ, Wilmshurst P. Hyperbaric oxygen therapy. BMJ 1998;317:1140–3 [PMC free article] [PubMed]

Articles from BMJ Case Reports are provided here courtesy of BMJ Publishing Group