[Non-Hodgkin's disease of the skull in a patient with AIDS].

The involvement of bone in non-Hodgkin's lymphoma (NHL) is rare and usually occurs in the late stages of the disease. The involvement of the cranial vault is exceptional and we have found only eleven cases previously reported in the revised literature, none of them in an AIDS patient. We report a case of a 38 years old man, intravenous drug abuser with AIDS diagnosed who presented with coma. Computed tomography scan showed a left frontal intra-parenchymatous haematoma and multiple osteolytic lesions in the whole of the cranial vault, that involved outertable, diploe and innertable. Intra-parenchymatous haematoma was removed and a biopsy of the osteolytic lesions was performed. Histology showed features of a large B-cell NHL. Patient died of infectious pulmonary complications. The incidence of NHL in patients with congenital or acquired immunodeficiencies is increasing and Epstein-Barr virus and other factors have been involved in its pathogenesis. That's the first AIDS patient reported to have a NHL involving the cranial vault. Tumour was limited to the cranial vault without involvement of soft-tissue. An intra-parenchymatous haematoma was associated without an explained cause.