Solitary Fibrous Tumour

ICD-O:9150/1

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

ICD-O:8815/0

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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