Hemangiopericytoma



Hemangiopericytoma


Cyril Fisher, MD, DSc, FRCPath









Hematoxylin & eosin shows a diffuse hemangiopericytic pattern. The vascular channels are dispersed throughout the tumor but vary in size, shape, and dilatation. Note the “staghorn” shape image.






Hematoxylin & eosin shows hemangiopericytoma with myxoid change. There is a hemangiopericytic pattern, but the vessels are slit-like image, not dilated.


TERMINOLOGY


Abbreviations



  • Hemangiopericytoma (HPC)


Definitions



  • Tumor with diffuse pattern of branching, dilated, thinwalled blood vessels composed of short spindle cells


  • Diagnosis is now rarely made



    • Many different specific tumor types have hemangiopericytic vascular pattern


    • Most remaining tumors without specific differentiation are now classified as solitary fibrous tumor


  • Tumors of pericytes now classified as myopericytoma

Jul 9, 2016 | Posted by in PATHOLOGY & LABORATORY MEDICINE | Comments Off on Hemangiopericytoma
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