Unusual Endobronchial Pulmonary

A case of an unusual pulmonary epithelioid hemangioendothelioma is described in which two distinctive types of histologic lesion were combined. The patient was a 54-year-old man with persistent hemoptysis. The main lesion was an endobronchial tumor that had classic features of epithelioid hemangioendothelioma of soft tissue. Multiple peripheral parenchymal nodules resembled features of intravascular bron-chioloalveolar tumor of the lung. The endothelial origin of the tumor cells was evi-dent on both ultrastructural and immunohistochemical findings, including the pres-ence of Weibel-Palade bodies and positive immunostaining to Ulex lectin and factor VIII-related antigen. This case seems to be an example with mixture of endo-bronchial epitheloid hemangioendothelioma of soft tissue type and peripheral intravascular bronchioloalveolar tumor histology, an association that has not been reported as yet. Int J Surg Pathol 3(1):59-64, 1995 Key words: lung, intravascular bronchioloalveolar tumor, epithelioid heman-gioendothelioma. Intravascular bronchioloalveolar tumor (IVBAT