Pathology: pleomorphic hyalinizing angiectatic tumour of soft parts

Pleomorphic hyalinizing angiectatic tumour

  • Spindle-epithelioid cells in fascicles

  • Eosinophilic cytoplasm with frequent intracytoplasmic haemosiderin

  • Ovoid hyperchromatic nuclei with occasional pseudonuclear inclusions and macronuceoli, and moderate pleomorphism; inconspicuous mitotic activity

  • Prominent ectatic vessels containing fibrin lining; mild lymphoplasmacytic inflammatory infiltrate

  • IHC: CD34

Pleomorphic hyalinizing angiectatic tumour

  • Spindle-epithelioid cells in fascicles

  • Eosinophilic cytoplasm with frequent intracytoplasmic haemosiderin

  • Ovoid nuclei with occasional pseudonuclear inclusions and macronuceoli, and moderate pleomorphism; inconspicuous mitotic activity

  • Prominent ectatic vessels containing fibrin lining; mixed inflammatory infiltrate

  • IHC: CD34