Pathology & Oncology Research

, Volume 17, Issue 4, pp 969–972 | Cite as

Kaposiform Hemangioendothelioma of the Spleen in an Adult: An Initial Case Report

  • Lu Yu
  • Shou Jing YangEmail author
Case Report


Kaposiform hemangioendothelioma (KHE) is a rare locally aggressive vascular neoplasm characterized by infiltrating nodules and sheets of spindle cells, and unmistakable resemblance to Kaposi's sarcoma. KHE occurs mainly in newborns and infants and presents most commonly in the skin, deep soft tissue, and bone. We report a case of KHE in a 36-year-old female who presented with a spleen mass and underwent splenectomy. Macroscopic examination revealed a large, dark-red, firm mass in the spleen. Histologically, the tumor consisted of irregular, infiltrating nodules of densely packed spindle-shaped tumor cells closely associated with small slit-like and sieve-like blood vessels, which were separated with hyalinized hypocellular fibrous stroma. Immunohistochemically, both spindle and epithelioid cells were positive for CD34, CD31, and vimentin, but negative for EMA, cytokeratin, CD21, CD35, CD1a, and S-100 protein. The well-formed capillaries and mature vessels but not spindle tumor cell showed reactivity for factor VIII- related antigen. Alpha-Smooth muscle actin was detected in pericytes surrounding small round or slit-like capillaries. The final histologic diagnosis was KHE. Follow-up 6 month after operation revealed no sign of recurrence or metastasis.To the best of our knowledge, this is the first report of KHE arising in the spleen.


Kaposiform hemangioendothelioma Kasabach–Merritt phenomenon Vascular tumor Immunohistochemistry Spleen 


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Copyright information

© Arányi Lajos Foundation 2010

Authors and Affiliations

  1. 1.Department of Pathology, Xi Jing Hospital4th Military Medical UniversityXi’anChina

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