Intravascular papillary endothelial hyperplasia

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Intravascular papillary endothelial hyperplasia
Diagnosis in short

Intravascular papillary endothelial hyperplasia. H&E stain.

Synonyms Masson tumour, Masson hemangioma

LM well-circumscribed lesion (low power) with abundant small vascular channels with benign endothelium +/-papillary formations with a fibrotic core covered by benign endothelium
LM DDx Kaposi sarcoma, other hemangiomas
Site blood vessel (artery)

Prevalence uncommon
Prognosis benign

Intravascular papillary endothelial hyperplasia, also Masson's hemangioma,[1] is a benign vascular lesion.

It is also known as a Masson tumour.[2]

General

  • Benign non-neoplastic lesion - a vessel that has thrombosed and recanalized.
  • Histomorphologically may be confused with low-grade angiosarcoma or other soft tissue sarcomas.[1]

Microscopic

Features:

  • Well-circumscribed - key (low power) feature.
  • Abundant small vascular channels with benign endothelium.
  • +/-Papillary formation with a fibrotic core covered by benign endothelium.[3]

DDx:

Images

www:

See also

References

  1. 1.0 1.1 Korkolis DP, Papaevangelou M, Koulaxouzidis G, Zirganos N, Psichogiou H, Vassilopoulos PP (2005). "Intravascular papillary endothelial hyperplasia (Masson's hemangioma) presenting as a soft-tissue sarcoma". Anticancer Res. 25 (2B): 1409–12. PMID 15865098.
  2. URL: http://path.upmc.edu/cases/case544/dx.html. Accessed on: 25 January 2012.
  3. URL: http://path.upmc.edu/cases/case544.html. Accessed on: 25 January 2012.