AUTHOR=Xiao Jianchun , Mao Jinzhu , Li Binglu TITLE=Clinical Characteristics and Treatment of Intra-abdominal Aggressive Fibromatosis: A Retrospective Study of 16 Patients JOURNAL=Frontiers in Medicine VOLUME=Volume 7 - 2020 YEAR=2020 URL=https://www.frontiersin.org/journals/medicine/articles/10.3389/fmed.2020.00002 DOI=10.3389/fmed.2020.00002 ISSN=2296-858X ABSTRACT=Background: This study aimed to investigate the clinical characteristics and treatment methods for intra-abdominal aggressive fibromatosis. Methods: We reviewed the clinical data from 16 patients who were diagnosed with intra-abdominal aggressive fibromatosis and were admitted to Peking Union Medical College Hospital between March 1983 and September 2018. Results: Among the 16 patients, 11 patients presented with a hard smooth abdominal mass with clear borders and a diameter of 4.3-25.0cm. Six patients had a history of abdominal surgery and 3 patients had a history of familial adenomatous polyposis. Computed tomography imaging revealed a slightly dense masss with mild-to-moderate enhancement. Of all the 16 patients, 11 patients underwent surgical treatment and no recurrence occurred in 10 case after complete resection while recurrence occurred in 1 case after partial resection.Two patients underwent surveillance and 3 patients received cytotoxic drugs treatment, and no disease progression was observed via imaging during their follow-up. Conclusions: Intra-abdominal aggressive fibromatosis is histologically benign tumor with high local recurrence rate. Surgery is an effective treatment and complete resection is essential in reducing the local recurrence rate.