Apophysiolysis of the anterior inferior iliac spine. A histological, clinical and radiological study.

Four cases of avulsion of the anterior inferior iliac spine were presented. Three of them affected boys of about 15 years (2 after a strain without local trauma--1 after local trauma). The fourth was discovered by chance on the X-rays of a man. Histological examination was made of 2 cases. A recent one showed the remodelling of a fracture of the apophysary growth cartilage. An older one showed aspecific bone remodelling. The incidence, clinical and radiological data, pathology and pathogenesis of such apophysiolysis is discussed.