PMC9542568_01
Plain radiographs of the left hand of a 39-year-old male of Amish descent with congenital proximal symphalangism demonstrating bony fusion of the second through fourth PIP joints and camptoclinodactyly of the fifth DIP joint.
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Radiographs of his bilateral hands revealed complete bony ankylosis in extension of the PIP joints in his bilateral second through fourth digits (Figure 1).
Plain radiographs of the left fourth digit reveal cortical irregularity at the level of the fused PIP joint (arrows) and adjacent soft tissue swelling.
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Radiographs of the affected left ring finger revealed persistent cortical irregularity in the region of the fused PIP joint with mild, adjacent soft tissue swelling, consistent with a subacute fracture (Figure 2).
Plain radiographs of the left ring finger after 6 weeks immobilization demonstrating mature trabecular bridging across the PIP joint.
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Radiographs revealed mature trabecular bridging across the fracture with restoration of the congenital bony fusion (Figure 3).