PMC5011147_01
(a) Preoperative findings. (b) Preoperative magnetic resonance imaging (T2) findings. The arrow indicates anterior bending of the coccyx.
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PMC5011147_01_eplasty16e25_fig1.jpg
F1
The elastic-hard nodule, 7 x 4 cm in diameter, was positioned cephalad in the gluteal cleft (Fig 1a). In the magnetic resonance image, the nodular mass was well bordered with a low signal on T1 and T2 (Fig 1b). It was localized at the outer side of the second to fourth coccyges, and the sacrococcygeal joint was flexed anteriorly at the right angle (Fig 1b).
Intraoperative findings. The protruding coccyx was resected.
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PMC5011147_01_eplasty16e25_fig2.jpg
F2
The nodule was resected with a small overlayed skin, and the prominence of the sacrococcygeal joint was shaved and rounded using a filea rasp under general anesthesia (Fig 2).