Solitary Fibrous Tumour


Haemangiopericytoma is characterised by the proliferation of oval, polyhedral or spindle-shaped cells enmeshed by collagen type IV fibres and arranged around vascular channels that are lined by a single layer of endothelial cells. The tumour contains numerous thin-walled blood vessels and the tumour cells, typically arranged around the blood vessels, are of uniform size with regular oval


Solitary fibrous tumour of the nose, paranasal sinuses and nasopharynx is in most instances a benign fibroblastic proliferation with variable cellularity and vascularity (Fig. 2.7) having features identical to those of solitary fibrous tumour of the pleura [8, 168, 279]. Its main differential diagnoses are sinonasal haemangio-pericytoma and nasopharyngeal angiofibroma.

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