Published: 2021-10-26

Isolated ulnopalmar dislocation of 5th carpometacarpal joint: a rare case report

Pratheeksh P., Manjunath S. Japatti, Ranganatha B. Thimmegowda, Rakshith Kumar K.


Isolated volar dislocations of the fifth carpometacarpal joints are an uncommon injury. They are classified as ulnopalmar or radiopalmar dislocations. It can be easily missed on standard radiographs. A high degree of suspicion and accurate reduction is pivotal in restoring the functional outcome of the hand. In our case report, a forty year old man presented with ulnopalmar dislocation of the fifth carpometacarpal joint and was treated with open reduction and K wiring. We review the literature and discuss the available methods of management.


Carpometacarpal dislocation, Open reduction, K wiring

Full Text:



Kumar R, Malhotra R. Divergent fracture-dislocation of the second carpometacarpal joint and the three ulnar carpometacarpal joints. J Hand Surg Am. 2001;26(1):123-9.

McWhorter GL. Isolated and complete dislocation of the fifth carpometacarpal joint: open operation. SurgClin Chic. 1918;2:793-6.

Fisher MR, Rogers LF, Hendrix RW. Systematic approach to identifying fourth and fifth carpometacarpal joint dislocations. AJR Am J Roentgenol. 1983;140(2):319-24.

Nalebuff EA. Isolated anterior carpometacarpal dislocation of the fifth finger: classification and case report. J Trauma. 1968;8(6):1119-23.

Nakamura K, Patterson RM, Viegas SF. The ligament and skeletal anatomy of the second through fifth carpometacarpal joints and adjacent structures. J Hand Surg Am. 2001;26(6):1016-29.

Waugh RL, Yancey AG. Carpometacarpal dislocations. J Bone Jt Surg. 1948;30A:397-404.

Peterson P, Sacks S. Fracture-dislocation of the base of the fifth metacarpal associated with injury to the deep motor branch of the ulnar nerve: a case report. J Hand Surg Am. 1986;11(4):525-8.

Young TB. Dorsal dislocation of the metacarpal base of the little and ring fingers with ulnar nerve branch compression. Injury. 1987;18(1):65-6.

O’Rourke PJ, Quinlan W. Fracture dislocation of the fifth metacarpal resulting in compression of the deep branch of the ulnar nerve. J Hand Surg Br. 1993;18(2):190-1.

Bora FW Jr, Didizian NH. The treatment of injuries to the carpometacarpal joint of the little finger. J Bone Joint Surg Am. 1974;56(7):1459-63.

Berg EE, Murphy DF. Ulnopalmar dislocation of the fifth carpometacarpal joint successful closed reduction: review of the literature and anatomic reevaluation. J Hand Surg Am. 1986;11(4):521-5.

Dennyson WG, Stother IG. Carpometacarpal dislocation of the little finger. Hand. 1976;8(2):161-4.