Anterior superior iliac spine

The anterior superior iliac spine (abbreviated: ASIS) is a bony projection of the iliac bone and an important landmark of surface anatomy. It refers to the anterior extremity of the iliac crest of the pelvis, which provides attachment for the inguinal ligament, and the sartorius muscle. The tensor fasciae latae muscle attaches about 5 cm away at the iliac tubercle.

Anterior superior iliac spine
The obturator membrane (anterior superior iliac spine visible in upper right of illustration)
Anterior superior iliac spine labeled second to bottom, right.
LatinSpina iliaca anterior superior
Anatomical terms of bone

The anterior superior iliac spine provides a clue in identifying some other clinical landmarks, including:

  1. McBurney's point
  2. Roser-Nélaton line
  3. True leg length (see unequal leg length)


Additional images

See also

  • Anatomy photo:17:os-0105 at the SUNY Downstate Medical Center – "Major Joints of the Lower Extremity: Hip bone (lateral view)"
  • Anatomy photo:35:os-0103 at the SUNY Downstate Medical Center – "Anterior Abdominal Wall: Osteology and Surface Anatomy"
  • "Anatomy diagram: 03281.000-3". Roche Lexicon - illustrated navigator. Elsevier. Archived from the original on 2012-07-22.
  • Diagram at Wayne State

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