A case of mycosis fungoides with large cell transformation associated with infliximab treatment.

© 2014 The Authors. doi: 10.2340/00015555-1675 Journal Compilation © 2014 Acta Dermato-Venereologica. ISSN 0001-5555 Patients with mycosis fungoides (MF) typically have a prolonged clinical course. A small proportion of cases progress over years through patch, plaque and tumour stages, followed by lymph node and visceral involvement (1). Some cases of MF are difficult to distinguish from other skin diseases, such as psoriasis and atopic dermatitis. Currently, tumour necrosis factor (TNF)-α inhibitors, such as infliximab, adalimumab, and etanercept, are widely used for treating patients with moderate to severe psoriasis (2). Blockade of TNF-α, however, is profoundly immuno suppressive, resulting in reactivation of tuberculosis and histoplasmosis, as well as the emergence of malignant lymphomas (3). In fact, some cases with MF manifested by treatment with TNF-α inhibitors have been reported (4–7). We describe here a 60-year-old woman diagnosed with psoriasis who showed exacerbation of MF with large cell transformation during treatment with infliximab.