PMC7649593_01
Right shoulder plain anteroposterior (AP) radiograph (a). Rapid progression of joint destruction seen at the 4-week follow-up in the AP view (b).
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Right shoulder magnetic resonance image, T1-weighted image showing a low signal intensity mass-like lesion (a). T2-weighted image showing low signal change, suggesting presence of hemosiderin deposit (b). Enhanced view showing enhancement of the mass-like lesion (c).
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T1- and T2-weighted images suggested PVNS of the shoulder joint as low signal change in T2-weighted image suggests the presence of hemosiderin deposits. The glenoid cartilage was preserved, and no distal invasion of PVNS was observed (Fig. 2a-c).
Intraoperative images. Collapsed humerus head (a). Preservation of glenoid cartilage (b).
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The humeral head collapsed, but the cartilage of glenoid remained intact (Fig. 3a and b).
Histopathological analysis at 100x magnification. The arrow indicates a multinucleated giant cell.
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Histological examination of the excised synovium indicated synovium proliferation with hemosiderin deposits (Fig. 4).
7-months postoperative follow-up plain AP view.
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Patient showed significant restoration of range of motion from 40  abduction, 10  forward flexion to 120  abduction with 50  forward flexion further flexion (Fig. 5).