Lung tumor
Other malignancies
Epithelioid hemangioendothelioma

Author: Deepali Jain, M.D. (see Authors page)

Revised: 3 January 2017, last major update September 2012

Copyright: (c) 2003-2017, PathologyOutlines.com, Inc.

PubMed Search: pulmonary epithelioid hemangioendothelioma
Cite this page: Epithelioid hemangioendothelioma. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/lungtumorEHE.html. Accessed March 29th, 2017.
Definition / General
  • Formerly called intravascular bronchioloalveolar tumor
  • 80% women, usually young adults
  • Neoplastic, but usually not metastatic
  • Progressive growth, usually remains within thoracic cavity, may cause death from respiratory insufficiency
  • Other sites: liver, bone
  • 10% have peripheral eosinophilia
  • Poor prognosis if vascular spread, pleural involvement, severe symptoms
Case Reports
Gross Description
  • Multiple round, well demarcated nodules < 2 cm, often in lower lung, with a gray-white peripheral rim and chondroid appearance
  • Resembles metastasis, granulomatous disease or interstitial lung disease
  • May spread along pleura or pericardium and resemble mesothelioma
Micro Description
  • Central hyalinized stroma, eosinophilic amorphous material or coagulative necrosis with variable calcification surrounded by thin rim of plump eosinophilic endothelial cells
  • Clusters fill alveoli, apparently through pores of Kohn, and occasionally bronchioles, arteries, veins
  • Nuclei are bland, round / oval, may have cytoplasmic vacuoles
  • No / minimal mitoses
  • Lung architecture preserved
Micro Images

Images hosted on other servers:

H&E, Factor VIII (figure D)

Positive Stains
Electron Microscopy Description
  • Endothelial features: well developed basal lamina, pinocytotic vesicles, occasional Weibel-Palade bodies
Differential Diagnosis
  • Metastatic tumor from liver or other sites: destroy lung architecture, high mitotic rate
  • Sclerosing hemangioma: destroys lung architecture, negative for vascular markers