incorrect anatomic description
https://media.aofoundation.org/-/jssmedia/surgery/61/61_a03_i120.png?w=665,
In this image the posterior superior iliac spine is indicated as "inferior"
observe for example this web image with the correct description or denimination:
https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.earthslab.com%2Fanatomy%2Filiac-spine%2F&psig=AOvVaw3UMcmHGoS9J4o_TtDK-XrY&ust=1697309277565000&source=images&cd=vfe&opi=89978449&ved=0CBEQjRxqFwoTCKiLs_bX84EDFQAAAAAdAAAAABAE