Related Experiment Video
Updated: Aug 15, 2026

04:08
Metacarpal Small Incision for Carpal Tunnel Syndrome
Published on: April 5, 2024
Capitate Fracture-Dislocation: An Unusual Pattern of Carpal Injury
Julia Bian1, Mirza Mujadzic1, Paulina B Le1
1Prisma Health/University of South Carolina School of Medicine, Columbia, USA.
Summary
This case report details a rare isolated volar capitate dislocation, a carpal injury often missed. Prompt diagnosis and surgical intervention led to successful recovery and restored wrist function.
Area of Science:
- Orthopedics
- Hand Surgery
- Radiology
Background:
- Isolated capitate dislocation is a rare carpal injury.
- Often associated with high-energy trauma and complex ligamentous disruption.
- This case presents a delayed diagnosis of isolated volar capitate dislocation with a chip fracture.
Purpose of the Study:
- To report a unique case of delayed-diagnosis isolated volar capitate dislocation.
- To review literature on similar presentations and treatment options.
- To discuss the potential mechanism of injury in such cases.
Main Methods:
- Case presentation of a 29-year-old male with wrist pain and paresthesias.
- Radiographic evaluation revealing volar migration of the capitate.
- Surgical intervention including open reduction, carpal tunnel release, and Kirschner wire fixation.
Main Results:
- Successful surgical management of the isolated volar capitate dislocation.
- Resolution of median nerve paresthesias.
- Restoration of functional wrist motion at final follow-up.
Conclusions:
- Highlights an unusual carpal injury pattern.
- Emphasizes the importance of thorough radiographic assessment for persistent wrist symptoms.
- Suggests transient ligamentous failure as a possible mechanism over complete rupture.
Related Concept Videos
Bones of the Upper Limb: Ulna
The ulna and radius are parallel bones of the antebrachium or the forearm. The ulna lies medially and consists of a bony tip called the olecranon process at its proximal end. This hook-like projection articulates with the olecranon fossa of the humerus and forms the "hinged" ulnohumeral part of the elbow joint. This joint facilitates forearm extension and flexion while preventing its hyperextension. Similarly, the coronoid process, another bony projection on the proximal/anterior side of the...
Bones of the Upper Limb: Radius
The radius is longer of the two bones that make up the human antebrachium or forearm. At the proximal end, the radius articulates with the capitulum of the humerus and the radial notch of the ulna to form the elbow joint. At the distal end, the radius articulates with the ulna via the ulnar notch, forming the distal radioulnar joint. Distally, the radius also attaches to the carpal wrist bones (scaphoid and lunate) to form the radiocarpal joint.
The radius has a nail-shaped head, and a short...
The radius has a nail-shaped head, and a short...
Fractures: Bone Repair
Treatment for a fracture is based on the type of break, the bone affected, and the patient's age.
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the procedure...
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the procedure...
Functional Classification of Joints
Functional Classification of Joints
The functional classification of joints is determined by the amount of mobility between the adjacent bones. Joints are functionally classified as a synarthrosis or immobile joint, an amphiarthrosis or slightly moveable joint, or as a diarthrosis, a freely moveable joint. Fibrous and cartilaginous joints can be functionally classified as either synarthroses or amphiarthroses, whereas all synovial joints are classified as diarthroses.
Synarthrosis
An immobile...
The functional classification of joints is determined by the amount of mobility between the adjacent bones. Joints are functionally classified as a synarthrosis or immobile joint, an amphiarthrosis or slightly moveable joint, or as a diarthrosis, a freely moveable joint. Fibrous and cartilaginous joints can be functionally classified as either synarthroses or amphiarthroses, whereas all synovial joints are classified as diarthroses.
Synarthrosis
An immobile...
Muscles of the Forearm that Move the Hand and Fingers
The muscles of the forearm that move the wrist, hand, and digits are numerous and diverse. They can be classified into two groups based on their location and function — the anterior and posterior compartment muscles.
Anterior Compartment
The anterior compartment muscles originate from the humerus. They primarily function as flexors and are also known as flexor muscles. They typically insert on the carpals, metacarpals, and phalanges. The superficial layer includes the flexor carpi radialis,...
Anterior Compartment
The anterior compartment muscles originate from the humerus. They primarily function as flexors and are also known as flexor muscles. They typically insert on the carpals, metacarpals, and phalanges. The superficial layer includes the flexor carpi radialis,...
Bones of the Upper Limb: Humerus
The upper limb consists of the arm, forearm, wrist, and hand bones. The humerus is the single bone of the upper arm region. Proximally, it has a large, spherical, smooth head that articulates with the glenoid cavity of the scapula to form the glenohumeral or shoulder joint. The margin of the head is the anatomical neck, a residual epiphyseal plate. Laterally it extends to form bony projections called the greater tubercle and the lesser tubercle. Next to the tubercles is the surgical neck, a...