Juvenile nasopharyngeal angiofibroma. 
The juvenile nasopharyngeal angiofibroma, a locally invasive, non-metastasizing tumour of male adolescence, occurs sporadically throughout the world.  Its histiogenesis remains uncertain and its management controversial.  These facets of a troublesome and dangerous conditions are discussed and the experiences from handling 9 such tumours seen at Groote Schuur Hospital over a 4-year period (1976-1979) are presented.  Surgical excision, using a wide field exposure and pre-operative systemic oestrogen medication, is recommended as the treatment of choice.