A carpal coalition that indicates the fusion of two carpal bones resulting from the failure of differentiation is a rare condition compared to the tarsal coalition. The most common carpal coalition is the luno-triquetral coalition, followed by the capitate-hamate coalition. Most of these coalitions are usually asymptomatic. Thus far, only a few cases of a coalition between the scaphoid and lunate with accompanied anomalies in the ipsilateral hand, such as accessory carpal bone or ray deficiency, have been reported. We present, for the first time, a case of a symptomatic isolated scapho-lunate coalition without any accompanying anomalies.
Carpal Bones ; Hand

Most capitate fractures occur in association with additional carpal injuries, particularly scaphoid fractures. Isolated fractures of the capitate account for only 0.3% of carpal injuries, and stress fractures are one form of this fracture. We report the case of a 20-year-old male who had a stress fracture of the capitate after serving as an honor guard in the military. Conventional radiographs and computed tomography of the right wrist revealed a minimally displaced fracture line located at the midcarpal aspect of the right capitate. A magnetic resonance imaging scan demonstrates a subarticular capitate fracture with diffuse bone marrow edema, small osteophytes, and irregularity of the midcarpal articular cartilage. We also review the carpal kinematics which possibly caused the stress fracture. Although stress fractures of the capitate are rare, they should also be accounted for with patients who perform repetitive motions of the wrist to a considerable extent.
Biomechanical Phenomena ; Bone Marrow ; Capitate Bone ; Carpal Bones ; Cartilage, Articular ; Edema ; Fractures, Stress ; Humans ; Magnetic Resonance Imaging ; Male ; Military Personnel ; Multidetector Computed Tomography ; Osteophyte ; Wrist ; Young Adult

The wrist joint is formed by the distal end of the radius and ulna proximally, and eight carpal bones distally. It has many ligaments to maintain stability of the complex bony structures. The incidence of ligament injuries of the wrist has increased due to sports activities. However, diagnosis and management of these injuries are sometimes difficult because of the anatomic complexity and variable injury patterns. Among them, scapholunate ligament injury and triangular fibrocartilage tears are the two most common injuries resulting in chronic disabling wrist pain. Thorough understanding of the wrist anatomy and physical and radiologic examination is mandatory for proper diagnosis and management of these conditions. This article will briefly discuss the wrist joint anatomy and biomechanics, and review the diagnosis and management of the scapholunate ligament injury and triangular fibrocartilage injury.
Carpal Bones ; Diagnosis* ; Incidence ; Ligaments* ; Radius ; Sports ; Tears ; Triangular Fibrocartilage ; Ulna ; Wrist Joint ; Wrist*

The wrist joint is a complicated structure composed of many bones and ligaments. Therefore, understanding the anatomy and the biomechanics of the wrist is important in order to administer proper treatment for patients. To easily understand the complicated structure, there were many trials to unite the complicated structure with a simple group such as the carpal row concept and the carpal column concept. Movement and load transfer along the wrist joint occurs with balanced action between carpal bones. To evaluate this static equilibrium, measuring tools such as carpal height ratio are used. When wrist flexion/extension occurs, each carpal row moves synchronously with action of the scaphoid. In contrast with flexion/extension, when wrist radial deviation/ulnar deviation occurs, the proximal carpal row moves in the sagittal plane, instead of the coronal plane. Recently, the dart throwing motion which occurred from the position of dorsiflexion with radial deviation to volar flexion with ulnar deviation is considered the main movement of the wrist joint.
Carpal Bones ; Humans ; Ligaments ; Range of Motion, Articular ; Wrist Joint ; Wrist*

PURPOSE: The purpose of this study is to evaluate the incidence and characteristics of concomitant carpal bone fractures and ligament injuries and to analyze risk factors for carpal injuries in patients with distal radius fractures. MATERIALS AND METHODS: A total of 362 patients with 379 distal radius fractures were reviewed retrospectively. Associated carpal bone fractures and ligament injuries were evaluated by plain radiographs and computed tomography at the time of initial trauma. Correlation between associated carpal injuries and various parameters was also analyzed. RESULTS: Of 379 distal radius fractures, 39 cases (10.3%) had one or more carpal bone fracture and 40 cases (10.6%) had carpal ligament injuries. Overall, carpal injuries occurred in 59 cases (15.6%) distal radius fractures. Associated carpal ligament injuries showed correlation with young age and associated carpal bone fractures showed correlation with AO type B distal radius fractures. Carpal injuries including fracture and ligament injury showed correlation with male, high energy trauma, or associated injuries beyond wrist. CONCLUSION: The incidence of concomitant carpal injuries in patients with distal radius fractures is relatively high. Concomitant carpal injuries were more common in young age, male, high energy trauma, AO type B distal radius fractures, or associated injuries beyond wrist.
Carpal Bones ; Humans ; Incidence ; Ligaments ; Male ; Radius Fractures* ; Retrospective Studies* ; Risk Factors ; Wrist

Trapezoid fracture is a rare condition and especially, isolated trapezoid fracture is most rare condition of carpal bone fracture. And principle of treatment has not yet been established. Most of trapezoid fractures can be treated using cast but displaced fracture or fracture combined with other carpal bone fractures may require operative treatment. There have been reports about case of conservative treatment in trapezoid stress fracture but no report about case of operative management. We treated a trapezoid stress fracture in a weight lifting athlete by operative treatment and report the results with literature review.
Athletes ; Carpal Bones ; Fractures, Stress* ; Humans ; Trapezoid Bone ; Weight Lifting

Dorsal perilunar dislocations are rare traumatic entities. Associated fractures such as carpal bones and radial styloid processes can occur. However, the dorsal perilunar dislocation associated with dislocation of distal radioulnar joint is extremely rare. The authors herein report the case of a 34-year-old man who was presented with transscaphoidal perilunar dislocation which is associated with dislocation of distal radioulnar joint.
Adult ; Carpal Bones ; Dislocations* ; Humans ; Joints* ; Lunate Bone ; Scaphoid Bone

Although intraosseous ganglion of the carpal bones is an uncommon lesion, it can be a cause of chronic wrist pain. Especially, pathologic fracture as complication of idiopathic intraosseous ganglion of the lunate is extremely rare. We report a rare case of idiopathic intraosseous ganglion with pathologic fracture of the lunate that was successfully treated by curettage and autogenous cancellous bone graft.
Bone Cysts* ; Carpal Bones ; Curettage ; Fractures, Spontaneous* ; Transplants ; Wrist

PURPOSE: A total of 27 carpal bone cysts were analyzed for their sites, relations of other wrist soft tissue ganglions and their results of treatment were evaluated. METHODS: Twenty-seven carpal bone cysts in 20 patients (bilateral 5, multiple 2) from February 2002 to June 2013 were evaluated. Mean follow-up period was 16.6 months. We investigated etiological classification, the site of carpal bone cyst, and their relationship with soft tissue ganglion in same wrist. Pain, range of motion, radiographic changes, and their satisfaction after treatment were assessed postoperatively. RESULTS: The carpal bone cysts occurred mainly at the radial wrist axial ray on the lunate (12 cases), scaphoid (6 cases), and triquetrum (5 cases), trapezium (2 cases), and capitate (2 cases). Based on the magnetic resonance imaging (MRI) findings in 25 cases, we classified carpal bone cysts into 4 distinct types; type I with purely intraosseous lesion (16 cases), type II with bone cyst associated cortical perforations (6 cases), type III with coexisting soft tissue ganglion communicating with intra-osseous lesion (2 cases), and type IV with coexisting soft tissue ganglion non-communicating intraosseous lesions (1 case). CONCLUSION: The carpal bone cysts can be classified by MRI into 4 distinct types. The purely intraosseous type is most common, suggesting the intrinsic cause in the development of carpal bone cyst.
Bone Cysts ; Carpal Bones* ; Classification ; Follow-Up Studies ; Ganglion Cysts ; Humans ; Magnetic Resonance Imaging ; Range of Motion, Articular ; Wrist

PURPOSE: The aim of this study was to identify an adequate chest compression site with measurement of the sternal length of young Korean adults. METHODS: We measured the distance from the suprasternal notch to the lower end of the sternum by palpation and width of heel above the carpal bone end 1 cm (H1), 2 cm (H2) in young Korean adults. We also measured weight, height, and BMI of participants. We then compared correlation of each collected variant to sternal length and heel length. RESULTS: A total of 200 young adults (100 men, 100 women) were enrolled. In measurement of the mean sternal length (SL), no difference was observed between men (19.9 cm) and women (19.6 cm) (p<0.05). However, height, weight, and BMI showed positive correlation with SL (R2 value, BMI=6.7, height=9.2, weight=10.4). After participants were divided into four groups based on gender and mean height, we calculated mean H2 and SL/2 of each group. The mean H2 and SL/2 of the group composed of men above mean height was 8.5 cm and 10.2 cm. The same value for the group of men below mean height was 8.5 cm and 9.7 cm. The mean H2 and SL/2 of the group composed of women above mean height was 7.5 cm and 10.1 cm. The same values for the group of women below mean height were 7.3 cm and 9.6 cm. The mean SL/2 was always higher than the mean H2 in different height groups. CONCLUSION: Compression just above the lower end of the sternum by heel on the hand is appropriate in men. In contrast, when performing chest compression in women, chest compression at the level of the sternum away from the width of the index finger of the sternal end is recommended.
Adult* ; Cardiopulmonary Resuscitation ; Carpal Bones ; Female ; Fingers ; Hand ; Heel ; Humans ; Male ; Palpation ; Sternum ; Thorax* ; Young Adult