CITATION: Birnie, R. H. 1988. Significance of assault injury of the hand : a case report. South African Medical Journal, 74:183.The original publication is available at http://www.samj.org.zaA patient who developed septic arthritis of a metacarpophalangeal joint after penetration by a tooth in a fist fight is described. The importance of recognising such a lesion at the time of injury is stressed.Publisher’s versio