has part has part characteristic of inheres in has modifier Widened greater sciatic notch Widening of the sacrosciatic notch UMLS:C4024620 HP:0010457 The sacroiliac joint in the bony pelvis connects the sacrum and the ilium of the pelvis, which are joined by strong ligaments. The notch is located directly superior to the joint. This term refers to a increase in the lateral dimension of the notch. HP:0008798 Widened sacrosciatic notch Abnormal greater sciatic notch morphology abnormal increased width greater sciatic notch