Epidemiology
Etiology
Primary psoas abscess
Caused by hematogenous or lymphatic spread of a pathogen from a distant source
Secondary psoas abscess
Caused by contiguous spread of a pathogen from an adjacent infectious focus
Primary focus may be:
Gastrointestinal: e.g., IBD (especially Crohn disease ), colitis, appendicitis, diverticulitis, pancreatitis
Musculoskeletal: e.g., osteomyelitis (esp. of the vertebrae), Pott disease, paraspinal abscess, septic arthritis (commonly of the hip in children), prosthetic joint infection
Genitourinary: e.g., pyelonephritis , cystitis
Risk factors for psoas abscess
Immunodeficiency (e.g., diabetes mellitus, HIV)
Causative pathogens
Pathophysiology
Clinical features
Diagnostics
CT abdomen and pelvis with IV contrast
Treatment
