Metastatic Crohn's disease: case report of an unusual variant and review of the literature.

PURPOSE: Metastatic Crohn's disease is a rare complication of Crohn's disease that has been infrequently reported in the literature. We report a case where submammary, inguinal, and perineal disease was observed in a patient many years after a proctocolectomy. The proliferative and polypoid morphology of the cutaneous lesions has not been previously described. In addition, this case describes severe cutaneous metastatic Crohn's disease in the absence of active gastrointestinal disease, which to our knowledge has not been reported in the literature.

RESULTS: A 55-year-old female with a 25-year history of Crohn's disease was investigated and treated over a 12-month period for metastatic Crohn's disease involving the submammary, inguinal, and perineal areas. These proliferative lesions with erythema and ulceration were histologically consistent with metastatic Crohn's disease. Gram and Ziehl Nielsen stains revealed no pathogenic organisms. The use of topical solutions, antibiotics, immunosuppression, and surgery failed to produce any significant benefit. A review of 42 cases of metastatic Crohn's disease in the literature is reported.

CONCLUSION: Cutaneous metastatic Crohn's disease has an extremely variable macroscopic appearance and may be a source of considerable morbidity. It can be present without other significant symptomatology, although it more commonly parallels gastrointestinal disease activity. There are no trials to guide current treatment, which is mainly based on anecdotal reporting.