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BackgroundPilocytic astrocytoma can be challenging to diagnose.MethodsIts clinical presentations can differ, directly related to its size and location, and are relatively unreliable. Similarly, imaging findings also vary with the location of the pilocytic astrocytoma.ResultsThis review provides an overview of the different imaging findings regarding pilocytic astrocytomas using both conventional and advanced magnetic resonance imaging sequences according to tumour location; the findings are strongly related to the tumour’s tendency to infiltrate surrounding structures, being able to carry out gross total resection, and finally the prognosis.ConclusionsKnowledge of these imaging manifestations of pilocytic astrocytoma may be helpful to arrive at an accurate diagnosis.Teaching PointsTo recognise the various imaging findings of pilocytic astrocytoma on both conventional and advanced magnetic resonance imaging sequences.To identify the characteristic imaging findings according to tumour location.To discuss the relevant differential diagnoses of pilocytic astrocytoma in each tumour location.

Sinonasal glomangiopericytoma is a benign rare tumour of pericytes that accounts for less than 0.5% of all sinonasal tumours. It is an indolent tumour with a macroscopic appearance of common inflammatory polyps.We report the case of a 55-year-old male who presented with right nasal obstruction. CT and MRI examinations demonstrated a soft-tissue mass that obstructed mainly the right nasal cavity. Biopsy revealed glomangiopericytoma. The tumour was treated with preoperative embolisation followed by complete endoscopic resection. Very few cases have been reported to be treated in this way.

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