Healing of UBC. Fifteen-year-old male of UBC in his left distal radius: Anteroposterior radiograph at his first presentation (A) and 12 months later (B). He had a pathological fracture at first visit and complete healing was observed after observation. Ten-year-old male of UBC in his left proximal humerus: Anteroposterior radiograph after surgery (C) and 4 years 7 months after surgery (D). Partial healing was observed after surgery of cannulated screw.