Cutaneous Diffuse Large B‐Cell Lymphoma, Leg Type

Cutaneous diffuse large B-cell lymphoma, leg type, is a malignant lymphoma of intermediate behavior, occurring mostly on leg(s) of elderly patients. This chapter describes the clinical features, histopathology, immunophenotype, molecular genetics, treatment and prognosis of diffuse large B-cell lymphoma, leg type. It is a matter of discussion whether diffuse large B-cell lymphoma, leg type, is a specific entity per se, or does simply represent a primary cutaneous variant of diffuse large B-cell lymphoma, unspecified. In fact, there are more similarities than differences between these groups, and it has been suggested that diffuse large B-cell lymphoma, leg type, should not be considered as a separate entity, but rather classified within the group of diffuse large B-cell lymphoma, unspecified. It must be remembered that diagnosis of cutaneous diffuse large B-cell lymphoma, leg type, is made only upon negative staging investigations, as any extracutaneous diffuse large B-cell lymphoma may involve the skin secondarily.