Body surface masses are tumors or other lesions originating from superficial skin soft tissues such as skin, skin adnexa and subcutaneous tissues, which are benign and malignant, with benign being the most common. The treatment of malignant body surface tumor is relatively complicated, and the repair of defect and appearance function after surgical enlargement and excision is more complicated, which is an important work of plastic surgery (plastic surgery). 1.Skin basal cell carcinoma is a common malignant tumor of body surface, a kind of low-grade malignant tumor that often occurs in epidermal basal cells or skin appendages in hairy areas, with lower incidence in yellow than white people. It is most common in outdoor workers and the elderly, and is more common on the head and face. It starts as a hard basal macular papule or wart-like protrusion, and gradually breaks down to form an ulcer. It grows slowly and rarely metastasizes. It is advisable to perform local enlargement excision surgery at an early stage and repair and plastic surgery of defects, and regular review after surgery. 2.Squamous epithelial carcinoma of skin is a common malignant tumor of skin, which originates from epidermis or keratinocytes of appendages, and mostly occurs on the basis of chronic ulcer, mucous membrane leukoplakia and staining dry skin disease. It is prevalent on the head, face and extremities, and can also occur on the trunk. The degree of malignancy varies, and local infiltration and lymph node metastasis can occur, while hematogenous metastasis is less common. Treatment can be based on the lesion site and the condition of the first choice of local enlargement resection and repair plastic surgery, if necessary, selective lymphatic dissection, regular postoperative review, according to the condition of the disease can be supplemented with radiotherapy, generally good prognosis. It is a highly malignant tumor originating from melanocytes in the skin. The incidence rate of yellow people is significantly lower than that of white people, and according to the literature, the incidence rate of yellow people is only 1/10~1/7 of that of white people, which is manifested as gradually increasing pigmented nodules with redness around them. Depending on the diversity of the patient’s condition, the treatment plan is complex. Early non-metastatic tumors should undergo extended resection, the extent of which varies depending on the pathological manifestations of the mass. In some cases, amputation/finger/toe surgery is necessary, and the lymph nodes that are definitely involved should be cleared, combined with chemotherapy, radiation therapy, biological therapy and other comprehensive means if necessary. 4. Aneurysmal dermatofibrosarcoma is characterized by painless hard nodules of pale red and lavender skin on the trunk and proximal extremities. It usually develops in middle age with slow progression and may show accelerated growth or surface rupture, local invasion and occasional dissemination, but distant metastasis is rare. To reduce the recurrence rate after surgery, the expansion of the excision range is large, and the postoperative soft tissue skin defect is large, which usually requires plastic surgery repair surgery such as flap transfer or skin graft. 5.Fibrosarcoma is a deep single hard nodule of limited nature, with rare skin breakdown, usually with normal skin surface and sometimes with certain tension. The tumor may be more malignant if the tumor is fast progressing, soft and larger. The treatment is mainly surgical resection, radiotherapy and chemotherapy are only used as adjuvant treatment, especially for the treatment of grade III to IV fibrosarcoma, and post-operative plastic surgery (plastic surgery) is needed to repair according to the specific defect. 6.Liposarcoma is a common malignant soft tissue tumor, mostly seen in patients aged 30 to 70. It is prevalent in the extremities, especially the thighs and buttocks. It is moderately malignant, progresses slowly, and rarely metastasizes. Localized extensive surgical resection treatment is preferred. Radiation therapy is not the main treatment for liposarcoma, but can be supplemented with a combination of radiotherapy and chemotherapy for patients with higher malignancy. After the above description, it can be seen that surgical extensive resection is one of the most fundamental and effective means to treat malignant tumors. However, when the tumor is removed, the oversized tissue defect is often difficult to be directly sutured, and it needs to be repaired by flap grafting or skin grafting in plastic surgery technique. There are also some tumors in important areas such as face, breast, hands and feet, perineum, etc. The shape after resection and repair is very important, and it is difficult for non-plastic surgeons to achieve perfect repair. Therefore, malignant body surface skin soft tissue masses and lesions are important for early diagnosis and early treatment, and appropriate treatment through plastic surgery (plastic surgery) is expected to completely remove the tumor lesions from the body surface, while achieving maximum functional rehabilitation and appearance improvement.