Skeletal tuberculosis, pelvic contraction, and parturition.

Obliquely contracted pelvis was observed in association with tuberculosis and dystocia (difficult parturition) in four out of 762 childbearing women in a Southeast Asian population. It is hypothesized that the pelvic contracture results from tuberculosis of the sacro-iliac joint with destruction of the sacral ala. This gross morphologic deformity, as observed in living populations, may be a useful marker for skeletal tuberculosis in prehistoric and historic populations as well. The occurrence of obliquely contracted pelvis with consequent dystocia as a specific complication of systemic tuberculosis may have direct implications for differential reproductivity.