Abdominal wall tumors are common occupying lesions in abdominal wall surgery, which can be divided into benign and malignant from pathological typing. Benign tumors of the abdominal wall include sclerofibrosarcoma, fibroma, neurofibroma, hemangioma, papilloma, dermatoid cysts, and so on. Malignant tumors include fibrosarcoma, bulging cutaneous fibrosarcoma, melanoma, skin cancer and metastatic cancer. 【Clinical manifestations】 Clinically, it presents as a painless ovoid mass within the abdominal wall, which is hard and slow-growing. In most patients, the tumor is found when its diameter reaches several centimeters. When the abdominal muscles are contracted, the outline of the tumor can still be clearly detected, which can be differentiated from intra-abdominal tumors. In a few patients with delayed diagnosis, the tumor shows patchy infiltrative growth in all directions, with a large area of abdominal wall rigidity, and the diameter can be up to more than 10 centimeters. Pathological description: The tumor originates from the muscle sheath or tendon membrane of the rectus abdominis, external oblique, internal oblique, or transversus abdominis muscle, and shows infiltrative growth into the muscle. The tumors had no envelope, irregular margins, and were crab-like; the texture was tough like rubber; the cut surface was grayish-white and interlaced and braided. Under the microscope, the tumor was composed of abundant collagen fibers and fewer fibroblasts, which were arranged in parallel; the cells had no anisotropy and nuclear schizophrenic phase; at the edge of the tumor, islets of transverse striated muscle tissue encircled by the tumor were often seen. The tumor histomorphology is benign, but it is highly prone to recurrence. The disease is more common in young adults. The tumor usually occurs in the dermis and is bulging. Under the microscope, the tumor is composed of spindle-shaped cells, with different cell lengths, fatness and thinness, mostly arranged in a mat pattern or whirlpool, some cells may have more significant heterogeneity, and the nuclear schizophrenic phase is rare, which is a kind of tumor with low malignancy. It is a low grade malignant tumor. The treatment should be surgical excision. The scope includes the tumor and the normal muscle, muscle membrane and tendon membrane nearby, and if it involves the peritoneum, it should be partially resected. Incomplete resection may lead to recurrence. If the abdominal wall defect is large after tumor resection, local tissue transfer combined with artificial material repair should be adopted to repair the abdominal wall to prevent the formation of incisional hernia. If the tumor is too extensive to be resected, radiation therapy can be tried.