PMC6428736_01
Preoperative X-ray of the first patient showing one calcified nodule sized 1.3 x 0.8 x 1.0 cm3 at the volar side of the capitate-hamate region. (A) Anteroposterior view. (B) Lateral view.
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F1
X-ray revealed a solitary calcified nodule sized 1.3 x 0.8 x 1.0 cm3 at the volar side of the capitate-hamate region (Figure 1).
Magnetic resonance imaging of the first patient disclosed focal lower intensity of the nodular lesion (white arrow) without obvious contrast enhancement. (A) Sagittal plane of T2- and T1-weighted images. (B) Axial plane of T1-weighted image with contrast. (C) Coronal plane of T1-weighted image.
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F2
Both T1- and T2-weighted magnetic resonance imaging revealed lower focal intensity of the nodular lesion without obvious contrast enhancement (Figure 2).
PMC6428736_02
Ultrasonography and preoperative X-ray of the second patient. (A) Transverse view and (B) longitudinal view present one hyperechoic ovoid lesion occupying the carpal tunnel with obvious median nerve compression. (C) Anteroposterior view and (D) carpal tunnel view show one radiopaque nodule sized 0.6 x 0.6 x 1.3 cm3 in front of the capitate.
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F3
A hyperechoic ovoid lesion with posterior shadowing between the median nerve and capitate, which led to compression of the median nerve, was noted (Figures 3A,B). X-ray also revealed one radiopaque nodule sized size of 0.6 x 0.6 x 1.3 cm3 in front of the capitate (Figures 3C,D).
Intraoperative findings and postoperative sonography of the second patient. (A) Transverse carpal ligament was released and one whitish, well-margined nodule was observed over the carpal tunnel. (B) Grayish calcified nodule with easily crumbled content. (C) Postoperative sonography revealed no compression of the median nerve by foreign bodies.
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F4
Resection biopsy and transverse carpal ligament release were performed; the intraoperative findings revealed a solitary, whitish, well-margined nodule over the carpal tunnel (Figures 4A,B). Postoperative sonography revealed no compression of the median nerve by foreign bodies (Figure 4C).