Anatomy Mallet finger is a flexion deformity of the distal phalanx, which occurs due to A Avulsion fracture of middle phalanx B Rupture of collateral slips of extensor expansion C Rupture of central slip of extensor expansion D Dislocation of distal interphalangeal joint 💡 Explanation Mallet finger is a flexion deformity of the distal phalanx, which occurs due to ✓ Correct Answer: B. Rupture of collateral slips of extensor expansion