Abstract
Objective: To characterize the frequency of carpal coalitions. Background: Carpal coalition is a rare congenital condition in which there is lack of segmentation of the carpal bones.1 This study attempts to characterize the frequency of different coalitions in the wrist.
Methods : A search was performed in the University of Utah PACS for all studies with keywords “coalition” that were included the hand or wrist anatomy (xray, CT, and MRI modalities). Patients’ ethnicity/race was obtained from information available on Epic charting.
Results: A total of 232 coalitions were identified in 198 patients (105 females, 93). 86 coalitions were found in the left wrist and 78 coalitions were found in the right wrist. Coalitions occurred bilaterally in 34 patients. The following types of coalition were identified: lunotriquetral (189), capito-hamate (20), trapezoid-capitate (11), scapholunate (6), scaphoid-trapezium (4), triscaphe (4), scaphoid-trapezoid (3), trapezium-trapezoid (3), hamatopisiform (2), capitate-triquetrum (2), capitate-lunate-hamate (1), scapholunotriquetrum (1). Multiple coalitions occurred in 11 wrists. 127 of these patients identified with White, not Hispanic/Latino, 37 as Black (African-American), 18 as Hispanic/Latino, 4 as Black (African), 3 as Asian, 1 as Pacific Islander, 1 as other, and 7 did not disclose.
Conclusion: Highest frequency was lunotriquetral (81%), capito-hamate (9%), trapezoid-capitate (5%) and in Whites (64%) and African/Americans (19%).
References
- Resnik C, Grizzard JD, Simmons BP, Yaghmai I. Incomplete carpal coalition. AJR 1986; 147:301-304
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Analyzing the Frequency of Different Types of Carpal Coalitions and Distribution by Tina Basak, MD