This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bony dysplasia and soft tissue affection, Subject name: Orthopaedics
[{'content': "The following structure is involved in Dupuytren's contracture - \nSelect and explain. \nA. Thickening of the palmar fascia, B. Thickening of the dorsal fascia, C. Contracture of the flexor tendons, D. Post burns contracture", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Dupuytren&;s contracture is characterised by a flexion deformity of one or more fingers due to thickening and shoening of palmar aponeurosis.Normally palmar aponeurosis is thin but tough membrane lying Immediately beneath the skin of the palm. Proximally it is in continuation with palmaris longus tendon. Distally it divides into slips one for each finger. The slip bends with the fibrous flexor sheaths covering the flexor tendon of the finger , and extends upto the middle phalanx. In Dupuytren&;s contracture aponeurosis or a pa of it becomes thickened and slowly contracts, drawing the fingers into flexion at the metacarpo-phalangeal and proximal interphalangeal joints. Reference- Essential ohopaedics- Maheshwari- 5th edn- pg no 302', 'role': 'assistant'}]