Primary cutaneous malignant lymphomas comprise a heterogeneous group of diseases with respect to clinical presentation, histopathology, prognosis and im-munophenotypic features. We know little about the pathogenesis of cutaneous lymphomas as yet.

• 原发性皮肤恶性淋巴瘤应明确只限于皮肤,自诊断后至少6个月以内,无任何可以检测出的皮肤以外受累的证据,是一组异质性复杂、临床表现、组织病理、免疫表型和预后差异很大的疾病,目前对其发病机制所知甚少。