Fibrous histiocytoma of lung?a clinicopathological study of two cases

Abstract
Two [human] cases of fibrohistiocytic tumors of the lung are presented. Histogenesis of this group of tumors is discussed. An essentially biphasic pattern of histiocytes and fibroblasts and the presence of myofibroblasts and undifferentiated mesenchymal cells is similar to the fibrohistiocytic neoplasms in other locations.