<prompt> The site of origin of angiofibroma -Roof of nasopharynxAnterior wall of sphenoid bonePosterior part of nasal cavity close to the sphenopalatine ganglionLateral wall of nasal cavity  <response>: The most common site is posterior part of nasal cavity close to the margin of sphenopalatine foramen.The tumor starts adjacent to the sphenopalatine foramen. Large tumors are frequently bilobed or dumbbell-shaped, with one portion of tumor filling the nasopharynx and the other portion extending to the pterygopalatine fossa. 