Psoas muscle abscess

Case contributed by Dr Bruno Di Muzio


Palpable mass in the left flank. Limitation of motion.

Patient Data

Age: 69
Gender: Female

CT Abdomen and pelvis

Voluminous encapsulated collection along left psoas muscle. Its walls are thick and enhances with contrast and, because its large dimensions, rejects the kidney and the left colon. There is a smaller collection in the left posterior abdomninal wall which communicates with the largest collection and is associated with densification of the subcutaneous around. 

Case Discussion

This case occurs in an uncontrolled diabetic and hypertensive patient.

Psoas muscle abscess and fluid collections are located in the retrofascial space rather than in the retroperitoneal space because the psoas muscles are located in theiliopsoas compartment posterior to the transversalis fascia, which is the posterior boundary of the retroperitoneum.

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Case information

rID: 28933
Case created: 23rd Apr 2014
Last edited: 10th Sep 2015
Inclusion in quiz mode: Included

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