Primary cutaneous lymphomas are malignant lymphocyte proliferations starting from the skin. Their clinical presentation is often stereotyped. We report the case of a 73-year-old woman who has been presenting, for the past 06 months, deep ulcerations with irregular borders, sanious and purulent bottom, located on the left upper leg with a metameric disposition mimicking a pyoderma gangrenosum. Nonetheless, the skin biopsy confirms the diagnosis of cutaneous anaplastic large cell lymphoma CD30 +. The assessment did not show extracutaneous involvement. This case illustrates the particularity of cutaneous lymphomas that can take different clinical forms, sometimes responsible for a diagnostic delay. The prognosis of CD30 + anaplastic cutaneous lymphoma remains good despite its often disturbing clinical presentation. However, the multicentric involvement associated with an atypical presentation seems to make its evolution less innocuous and requires a rigorous follow-up.
Key words: cutaneous lymphoma, metameric, pyoderma gangrenosum, positive CD 30
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