Hip

Question 1

Where is true hip pain felt?

Answer 1

Groin

Question 2

Wolff’s Law

Answer 2

• Trabecular bone is the part that is constantly remodeling to maximize ability to resist stress
• Osteoblasts build new bone; osteoclasts resorb bone

Question 3

Hip Pain Differential (5)

Answer 3

• OA - groin
• Trochanter bursopathy - lateral, fluid-filled sac on trochanter; deep aching pain on lateral aspect of thigh esp when lie on it
• Hip fracture - diff locations
• Synovitis - more peds; usually transient but must r/o infection
• Avascular necrosis - (called Legg-Calve- Perthes syndrome if in pediatric population) compromise blood supply to femoral head

Question 4

Causes of Avascular Necrosis

Answer 4

• PLASTIC RAGS
  
  • P- pancreatitis (alcohol)
  • L- lupus
  • A- alcohol
  • S - steroids
  • T- trauma
  • I - infection, idiopathic
  • C- collagen vascular disease, Caisson’s disease (decompression sickness - nitrogen in femoral head)
  • R- radiation
  • A- amyloid (deposits in vascular tissues of femoral head)
  • G - Goucher’s (lysosomal storage disorder - deposit tissue in abnormal places - hip)
  • S- sickle cell anemia (crisis in hip)