[Primary hemangioendothelioma of the bone marrow]

A case of malignant haemangioendothelioma in a 61-year-old female is described. The tumour infiltrated extensively medullary spaces in a number of bones without their destruction. Extraskeletal neoplastic foci were found in the intestine and in a lymph node, liver and especially spleen were involved more extensively. Several diagnostic features of the tumour are listed together with its position in some recent classification schemes.