PMC9091393_01
Clinical findings, shortening, malrotation, and inability to flex the metacarpohalangeal of the little finger.
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F1
An initial diagnosis of proximal interphalangeal dislocation of the fifth finger was made, which was reduced and immobilized with dynamic finger splint (Fig. 1).
Anterior posterior, lateral and oblique radiography, and palmar dislocation of the fifth metacarpal bone.
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F2
X-ray of the hand was taken (Fig. 2), which shows a shortening of the fifth metacarpal, an alteration of the cascade of the metacarpal lines, a disruption of the M line, a loss of the relationship between the base of the fifth metacarpal with the hamate toward the ulnar aspect, and an overlapping of the base of the fifth metacarpal with the hamate.
Computed tomography, coronal, sagittal and axial image, and palmar dislocation of the fifth metacarpal bone.
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F3
A computed tomography scan of the hand was made (Fig. 3).
Fluoroscopic and clinical intraoperative images, evaluating reduction of palmar dislocation of the fifth metacarpal bone, the Kirschner wire and the internal brace in proper positioning.
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F4
The fixation was done with an internal brace (Arthrex, Naples FL) fixed at the base of the fifth metacarpal, the base of the fourth metacarpal and the hamate, achieving an adequate restitution of the articular relationship between the fifth metacarpal and the hamate, and an ulnar gutter was placed (Fig. 4).
Clinical evaluation in the last control, comparing contralateral hand.
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F5
The little finger had a deformity in flexion of the proximal interphalangeal, the active flexion at the metacarpophalangeal level was 45 , and she was able to perform full extension, the proximal interphalangeal achieving a maximum flexion of 100 , and active extension of 64  Fig. 5.