Identifying the Location of the Sacroiliac Dimples on the Female Body

Description

Paired sacroiliac dimples are positioned symmetrically in the lower lumbar region of an adult female, just superior to the gluteal cleft and lateral to the midline overlying the posterior superior iliac spines (PSIS). Each shallow depression sits inferior to the iliac crest, typically at the level of the S2 vertebral segment and posterior to the sacroiliac joint line, creating a dependable surface marker where the sacrum meets the ilium. Between them, the median sacral crest and natal cleft define the posterior midline, while laterally the contour transitions onto the posterior iliac wings and upper gluteal region. Small landmarks. Big orientation. Surface identification of the fossa lumbales laterales (often called dimples of Venus) matters because the PSIS is one of the few palpable bony points that reliably bracket the sacroiliac joints in living anatomy, even when soft tissue obscures deeper structures. Clinicians use this relationship when planning palpation-based assessment of SI joint pain, marking the target region for fluoroscopy or ultrasound guided sacroiliac joint injection, and teaching pelvic alignment concepts such as pelvic tilt and innominate rotation in physical examination. The same landmarks also help communicate incision placement and flap design in lumbosacral and gluteal reconstructive planning, where millimeters change symmetry. Use this illustration in gross anatomy and surface anatomy teaching (back and pelvis), physical therapy and sports medicine coursework focused on pelvic girdle mechanics, and clinical skills materials on documenting posterior pelvic landmarks during musculoskeletal exam. It also fits patient education and cosmetic surgery publications that need accurate terminology for the sacral dimples and their relationship to the PSIS and sacroiliac region. Anatomical accuracy verified by SciePro's Medical Advisory Board.