Sciatica in the community--not always disc herniation.

Three cases of sciatica seen in general practice are described. The clinical features were consistent with pyriformis syndrome, a condition of compression of the sciatic nerve at the pelvic outlet. The literature on causes and clinical features is briefly reviewed. The prevalence of the condition in the community and the accuracy of clinical diagnosis are unknown. It is suggested that pelvic outlet syndrome, comparable to carpal tunnel syndrome, is a more appropriate name for the condition.