“…The preoperative diagnoses were divided into nine groups: (1) lipoma (including fibrolipoma and angiolipoma), (2) giant cell tumor of tendon sheath (GCTTS), (3) fibroma (including fibromatosis and dermatofibroma), (4) vascular tumors (e.g., (hem)angioma, lymphangioma, varix, Masson lesion, venous malformation, organized thrombus/hematoma, fibrovascular lesion), (5) glomus tumor, (6) neurological tumor (e.g., schwannoma, neurofibroma, (traumatic) neuroma, perineurioma), (7) leiomyoma or angiomyoma, (8) other (e.g., calcification, chondroma), and (9) unknown benign tumor.…”