Primary lymphoblastic non-Hodgkin's lymphoma of the skin.

The clinical, histological, and ultrastructural features of a patient with a primary lymphoblastic non-Hodgkin's lymphoma of the skin are described. Four months after the onset of the disease the patient died with extracutaneous involvement of lymph nodes, spleen, liver, kidneys and lungs. The rapidly fatal outcome without the development of leukaemia or involvement of the bone marrow and the mediastinum is uncommon.