A 20 year old man from hilly areas presented with epistaxis. His DSA showing sphenopalatine branch of maxillary artery is shown below. The arrow most likely points to which pathology?

Ans. B. AVM* The arrow points to the blush due to AVM supplied by the ethmoidal branch of ophthalmic artery (from ICA) and the sphenopalatine branch of internal maxillary artery (from ECA).* This is typical of AV malformation. Note the communication between these arteries.* Normally, the nasal fossa is supplied by both the ICA and ECA.* The blush in angiofibroma won't be so anterior and there won't be communication between arteries.