Primary dural hemangiopericytoma with xanthomatous change mimicking meningioma: a case.

Hemangiopericytomas of the Central Nervous system present as a distinct clinicopathologic entity, having been categorized as a “mesenchymal-meningothelial tumour”, according to the current WHO classification. Not only is the lesion rare, but it also bears imaging, macro-micro and immunohistochemical similarities to the commoner tumour-meningioma and to the solitary fibrous tumour and has an indolent biological behaviour unlike the other two. We present a case of a 48 year old lady, diagnosed on imaging as meningioma, which turned out to be a dural hemangiopericytoma after complete histological and immunohistochemical work up. Excluding hemangiopericytoma in lesions presenting as intra-cranial tumours is critical, as the tumour is known for recurrence and metastasis, thereby warranting more aggressive treatment by the neurosurgeons, aiding in better patient care. We report this case not only because of its rarity, but also to show the xanthomatous change the tumour showed, not documented in literature so far.