Psoas Abscess

**Definition:** Abscess of the PSOAS MUSCLES resulting usually from disease of the lumbar vertebrae, with the pus descending into the muscle sheath. The infection is most commonly tuberculous or staphylococcal.

**Tree numbers:** - C01.830.025.700

**Synonyms:** - Abscess, Psoas - Iliopsoas Abscess - Pyogenic Iliopsoas Abscess