Simultaneous Dorsal Base Fracture and FDP Avulsion of Distal Phalanx of the Little Finger

Avulsion injury of the flexor digitorum profundus (fdp) with concomitant fracture of the distal phalanx dorsal base is uncommon. simultaneous avulsion fractures of the insertion of this tendon associated with rupture of the tendon from the bony fragment and combination with dorsal base fracture is very rare and also complicated. a 36- year- old man fell and injured his right little finger. fdp avulsion with simultaneous dorsal base fracture (containing extensor tendon insertion) was detected. our surgical repair by a single midlateral incision the avulsed fragment was replaced on the palmar base of the distal phalanx and successfully immobilized with 1.5 mm screw. after three months, patient had 20 degree range of motion in dip joint. the digit was pain free and also relatively functional. it seems that fdp avulsion classification need to be extended and include this uncommon type as described in this case report for better management of these uncommon type.