1. Attention is drawn to primary isolated abscess in the psoas sheath as a definite clinical entity.
2. Details of twenty-four cases are reported.
3. The organism in the majority of patients was coagulase positive Staphylococcus pyogenes.
4. In all but one patient there was a prompt response to incision and drainage of the pus supplemented by appropriate antibiotic therapy.
Copyright 1966 by The Journal of Bone and Joint Surgery, Incorporated