This document describes a study examining variations in the anatomy of blood vessels that supply the iliac bone. The researchers dissected 216 iliac regions from cadavers and clinical cases. They observed four main variations in the origin and branching patterns of the deep circumflex iliac artery, which is the primary blood vessel supplying the iliac bone. The relationships between this artery and surrounding anatomical landmarks like the anterior superior iliac spine were also measured. Documenting these variations will help surgeons more safely harvest vascularized bone grafts from the iliac crest while reducing complications.