PMC6727445_01
(a) X-ray detailed: X-ray, radiological follow-up at 12months revealed a progressive, "lollipop-like" heterotopic ossification of a protruding Kirschner wire at the left pelvic from the 9-year-old girl.
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F1
Radiological follow-up at 12 months revealed a progressive, "lollipop-like" HO (Fig. 1a) lateral to the acetabular roof at the tip of a protruding K-wire.
(a) X-ray detailed: X-ray, the X-ray showed a progressive,"lollipop-like"heterotopic ossification at the protruding end of the proximal titanium elastic nails (TENs) in the 15-year-old boy.(b) Macroscopy detailed: Macroscopy view, removed TENs, and resected heterotopic ossification for histopathology after surgery of the 15-year-old boy. (c) Histology detailed: Histopathology, histopathology of the "lollipop-like" heterotopic ossification at the protruding end of the proximal TEN in the 15-year-old boy.
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F2
At 12-month follow-up, there was no clinical difference in comparison with the other leg and hip, but the X-ray showed a progressive, lollipop-like HO at the protruding end of the proximal TEN (Fig. 2a). HO (Fig. 2b). Histopathology showed benign HO with no signs of infection (Fig. 2c).