The incidence and clinical importance of hysterographic evidence of cavities in the uterine wall.

Filling of cavities in the uterine wall during hysterography was observed in 54 of 320 surgically excised specimens in which metal threads had been inserted at different levels for identification. Adenomyosis may have accounted for these cavities in 24%. Cavities secondary to adenomyosis in one part of the uterus coexisted when cavities not etiologically related to the disease in another part. Adenomyosis is generally not involved in the pathogenesis of cavities in the lower half of the uterus and does not account for cavities of more than 5 mm in diameter.