Fig. 1

a Ultrasound indicates the lesions were located under superficial layer of the planta before operation. b The tumor was located above the plantar fascia. c For the superficial type, the vogue lobulated lesion was arranged. The lesion constituted discrete fibroblast, the confined lacuna vasorum and red collagen fibers. Fibroblast had the shape of short shuttle, the partial cells were rich with bundles of spindle-shaped arrangement (magnification ×100)