Abstract
In 2005, the European Pediatric Soft Tissue Sarcoma Study Group (EpSSG) proposed a conservative treatment algorithm-consisting of an initial wait-and-see strategy, non-mutilating surgery, and minimal-morbidity chemotherapy (in the case of tumour progression)-for paediatric patients with desmoid-type fibromatosis. We aimed to investigate the outcomes of this algorithm. In this case series, patients (<25 years) with desmoid-type fibromatosis from 57 centres in eight countries were prospectively registered through a web-based system. Diagnosis was based on histological analysis of the tumour specimen after biopsy or surgery, and we classified patients by tumour site, clinical stage (TNM system), and post-surgical stage (Intergroup Rhabdomyosarcoma Study system). Progression-free survival was defined as the time from diagnosis until disease progression (clinical or radiological progressive disease, relapse, or death from any cause). From Oct 1, 2005, to July 31, 2016, 173 patients (median age 11·4 years [IQR 4·0-14·1], 88 [51%] male patients) were registered. After excluding patients with missing data, 54 (35%) patients had no immediate therapy (wait-and-see strategy), 47 (31%) had immediate surgery, and 53 (34%) had immediate chem...Continue Reading
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