see also:

• The adult with back pain in the ED

• buttock pain is not an uncommon presentation, it may be:
  • isolated pain
  • associated with back pain and sciatica
  • associated with abdominal pain such as with abdominal aortic aneurysm (AAA)
  • primarily only on walking - buttock claudication

• impaired blood flow from internal iliac artery
  • abdominal aortic aneurysm (AAA)
  • abdominal aorta stenosis - likely to cause bilateral symptoms
  • internal iliac artery stenosis
  • complication of IIA stent/endovascular repair including gluteal compartment syndrome

• gluteal muscle strain
• ischiogluteal bursitis
  • weaver's bottom
• hamstring tendonitis
• piriformis syndrome - muscle spasm or haematoma in the piriformis muscle
  • can also irritate the sciatic N causing sciatica
  • pain increases walking up stairs long walks, running, and with prolonged sitting
  • there may be reduced ROM of the hip joint
• shingles
• haematoma
• abscess
• pyomyositis gluteal muscle
  • usually haematogenous seeding of Staph. aureus, eg. IVDU
  • higher risk in immunocompromised
  • MRI is best diagnostic modality
  • https://www.bmj.com/content/357/bmj.j2400
• sacro-iliitis - inflammatory, septic
• sacral stress fracture
• hip pain
  • avascular necrosis of the femoral head
  • osteoarthritis
  • bursitis
• endometriosis
• pelvic or urethral neoplasia
• rarely, persistent sciatic artery aneurysm which is a rare congenital anomaly