Analysis of prolonged survival time of rats with liver transplantation induced by rejection reaction model ) therapy, the total radiation dose was 60Cv. Because its estrogen receptor was positive, oral tamoxifen was given after operation, 10r, 3 times/d, for 1 year of treatment. One recurrent patient also orally took tamoxifen for one year because its estrogen receptor was positive to prevent recurrence. Results: There was no death in this group of cases. The wounds of 9 patients who underwent direct suture of the abdominal wall after tumor resection all healed in phase I. Among the 5 patients who underwent repair of the abdominal wall with polyester cloth and Marlex mesh, one patient developed subcutaneous effusion, which was cured after treatment. This group followed up 11 cases (including 9 cases initially diagnosed in our hospital and 2 patients who came to our hospital for consultation after recurrence). The average follow-up time was (40.8±8.8) months. Except for one case with subtotal tumor resection who had slow tumor progression during 4 years of follow-up, there was no recurrence observed in others. Discussion: Macfarlane first reported this disease in 1832. It is reported abroad that the incidence rate is about 0.2~0.5/100,000 people, accounting for less than 3% of soft tissue tumors [1], and approximately two-thirds of the total number of desmoid tumors. Etiology: ①The relationship between pregnancy, abdominal surgery, and desmoid tumors on the abdominal wall: Many authors have acknowledged that pregnancy and abdominal surgery causing abdominal wall injury can lead to the onset of the disease. In this group, 10 cases had a history of pregnancy, 8 cases had a history of abdominal surgery, and all 8 cases occurred in the surgical scar area and nearby. ②The relationship between familial adenomatous polyposis (FAP) and desmoid tumors on the abdominal wall: Statistics show that the incidence rate of desmoid tumors in FAP patients is 852 times higher than in the normal population; the main site of onset is the mesentery, but it can also occur on the abdominal wall, where the lesion can be solitary or multiple [1]. Only one case in this group was accompanied by multiple adenomatous polyps in the colon. ③The relationship between sex hormones and desmoid tumors on the abdominal wall: This tumor is more common in women of childbearing age between 18-36 years old, and fewer cases occur after menopause. Quite a few authors have reported that large desmoid tumors on the abdominal wall can disappear spontaneously or naturally regress after menopause; estrogen receptors have been detected in desmoid tumor specimens [1]. In this group, 13 cases were women of childbearing age, and among the 8 cases sent for examination, 6 cases were positive for estrogen receptors, supporting this viewpoint. Clinically, if married women of childbearing age find hard, round or oval masses near the surgical incision with unclear edges, they should highly suspect this disease. Ultrasound and CT scans can help clarify the location, size, and extent of the tumor, but final confirmation depends on pathological examination. Although this tumor does not metastasize, it has been reported that the recurrence rate after surgery can be as high as 50%-66.8%, mainly occurring in the age group of 18-30 years old, speculated to be related to insufficient surgical resection or excessively large tumors. Our treatment experience is that for initial diagnosis cases, wide and thorough removal of the tumor should be the first choice. Incomplete initial surgery directly correlates with tumor recurrence, and the resection margin needs to be more than 2cm away from the tumor edge. For cases with large abdominal wall defects after tumor removal, good tissue-compatible artificial materials such as polyester cloth and Marlex mesh can be used for repair. Some scholars believe that adjuvant radiotherapy after surgery can reduce the postoperative recurrence rate when the surgical resection range is insufficient [1], and the radiation dose is generally 50-60Gv. In this group, one patient who only underwent partial tumor resection received radiotherapy after the operation. Because his estrogen receptor was positive, he was simultaneously given oral tamoxifen. During 4 years of follow-up, the tumor progressed slowly. Some scholars reported that the effective rate of endocrine therapy for solitary tumors is 60%, with tamoxifen being the first choice drug, and luteinizing hormone-releasing hormone as the second-line drug, provided that the tumor's estrogen receptor is positive. In this group, both the one recurrent patient with a positive estrogen receptor and the one patient with incomplete tumor resection were given tamoxifen after the operation, with satisfactory results.