Unknown A patient on colles cast present after two weeks with the inability to extend his thumb, the most likely reason is: A Rupture of extensor pollicis longus tendon B Compartment syndrome C Carpal tunnel syndrome D Sudek's osteodystrophy 💡 Explanation A patient on colles cast present after two weeks with the inability to extend his thumb, the most likely reason is: ✓ Correct Answer: A. Rupture of extensor pollicis longus tendon