The hysterographic appearances in three histologically verified cases of stromal endometrosis are presented. Interpretation of the unusual radiographic findings on the basis of uterine pathology is attempted. Little is known about the preoperative diagnosis of the disease. A triad of uterine enlargement, endometrial stromal hyperplasia with few or no glands in the curettings and unusual hysterographic findings strongly suggests a diagnosis of stromal endometriosis.