Claude Pierre-Jerome MD, PhD, Abstract Co-Author: Nothing to Disclose

Mehdi Sadat Akhavi, Presenter: Nothing to Disclose

Hasan Banitalebi MD, Abstract Co-Author: Nothing to Disclose

1) Review of the anatomy and biomechanical role of the psoas muscle in the motion of the trunk and spine, 2) presentation of both frequent and rare anatomical variants of the psoas muscle 3) role of MRI in imaging the pathological psoas.

This exhibit will display: 1)MR images of the normal psoas in three plans with emphasis on the insertion points and origin of the muscle and its relationship with the intervertebral disc, 2) illustration of the vascular supply to the psoas, 3) illustration of the innervation of the psoas, 4) the diverse anatomical variants of the psoas such as: a) asymmetry of the insertion of the psoas, b) abnormal low insertion points below L1 level, c) asymmetry of the psoas size, d) unusual bilateral convex shape of the psoas, and e) unilateral absence of the psoas. The pathologies of the psoas will include: muscular hematoma and bleeding, muscle contusion, muscle tear, myositis ossificans, unilateral atrophy, bilateral atrophy, atrophy of the psoas associated with atrophy of the paraspinal muscles, atrophy and deformity of the psoas muscle associated with scoliosis, psoas edema, isolated psoas abscess and psoas abscess associated with spondylodiscitis.

http://abstract.rsna.org/uploads/2014/14016690/14016690_tvw8.pdf

Pierre-Jerome, C, Sadat Akhavi, M, Banitalebi, H, MRI of the Psoas Major Muscle: Anatomy, Anatomical Variants and a Catalogue of Pathologies Affecting the Muscle.  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14016690.html