Fig. 4

a: 1 month old baby’s right thigh with a huge KHE and KMP, the tumor occupied the outer side of the thigh. b: Three-dimensional reconstruction of CTA showed the tumor was feeding by the right deep femoral artery and its branches. c: In the operation, a part of the tumor feeding artery was ligated to reduce intraoperative bleedingat first. d: 1 year after tumor resection and skin grafting, the patient’s wound healed well and no recurrence was seen. e: Pelvic cavity CT scan of a 9-month-old baby showed a soft tissue mass in the left pelvic cavity. The boundary between the mass and the left psoas muscle and the iliopsoas muscle was unclear. The spinal canal was invaded, and the left side of L3–5 vertebrae structure was destroyed. Contrast-enhanced CT scan showed significant enhancement within the tumor. f: Three-dimensional reconstruction of CTA showed the tumor was closely adhered to the abdominal aorta and the left internal iliac artery. The tumor was compressed and partially wrapped around the left external iliac artery. g: 1 year after surgery, pelvic CT showed L3–5 vertebral structurewas partially repaired, and no recurrence was seen. h: 1 year after surgery, CTA showed no tumor was wrapped in the left external iliac artery, and no filling defect was seen in the lumen