This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infective Arthritis, Subject name: Orthopaedics
Tom smith's arthritis is due to - 
Select and explain. 
A. Pyogenic infection in infancy, B. TB, C. RA, D. OA
A: Pyogenic infection in infancy
Answer: A: Pyogenic infection in infancy 
Explanation: Ans. is 'a' i.e., Pyogenic infection in infancy Tom smith arthritis (septic arthritis of infancy)o Tom smith arthritis is the septic arthritis of hip joint, occurs in infancy. At this stage head of the femur is cartilaginous and is rapidly and completely destroyed by the pyogenic process. Onset is acute with abscess formation, which heals rapidly after spontaneous bursting outside or after incision and drainage. Quite often it is a delayed presentation and the child is brought for consultation when he begins to walk with a limp. On examination:-i) Limb is shortii) Hip movements are increased in all directions.iii) There is instability with positive telescoping.