This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infection of Bones & Joints, Subject name: Orthopaedics
Tom Smith arthritis involves 
Select and explain. 
A. Knee, B. Hip, C. Ankle, D. Wrist
B: Hip
Answer: B: Hip 
Explanation: Ans. b (Hip) (Ref Maheshwari orthopedics 4th/165)TOM SMITH ARTHRITIS# Septic arthritis of hip joint in infant# Acute onset with rapid abscess formation# Head of femur is cartilaginous at this age and hence rapidly and completely destroyed by the pyogenic process.# Affected limb shorter and hip movements are increasd in all directions# Telescopy test +.# Complete absence of the head and neck of femur and normally developed round acetabulum on X-ray differentiates it from CDH.# Rx:- Arthroscopic wound lavage (minimally invasive Rx).