[Local recurrent centroblastic lymphoma of the skin].

A 57-year-old patient suffered from a cutaneous centroblastic polymorphic non-Hodgkin lymphoma. This tumour first occurred 6 years ago and showed local relapses after two surgical excisions without any internal manifestations. The tumour had unusual morphological features with a sarcomatous growth pattern and numerous multilobated nuclei, which first led to the diagnosis of a malignant fibrous histiocytoma. Additional immunohistological studies of both the primary tumour and the lesions demonstrated the presence of lymphocytic marker proteins and allowed the definitive classifications as a high-grade malignant non-Hodgkin lymphoma of the B-cell type.