<prompt> Avulsion of extensor tendon give rise to?Mallet fingerDupuytrens contractureTrigger fingerSwan neck deformity  <response>: It is the flexion deformity of the distal interphalangeal joint usually due to avulsion of extensor tendon of distal phalanx. Ref: Current Diagnosis Treatment in Ohopedics 3e, page 538,564-65. 