Abstract
OBJECTIVES: To assess the accuracy of incisional biopsies (IB) and needle biopsies (NB) in soft-tissue tumors treated at a Brazilian center of reference, as well as the variables related to the demographic profile and treatment established. METHODS: A retrospective, descriptive and observational study was conducted with patients with malignant soft tissue tumoral lesions, of indeterminate and intermediary malignancy, subjected to IB or NB at the institution from January 2010 to December 2019. RESULTS: 114 biopsies were performed in soft-tissue tumors of malignant lesions, of indeterminate and intermediary malignancy; of these 90 biopsies, 61 (67.7%) were IB and 29 (25.4%) were NB. It was necessary to perform a new collection in 5 cases among the NB (17.2%) and 1 case among the IB (1.6%). The IB accuracy was 83.6, while NB was 62.1. Of the 18 patients subjected to surgical treatment with radical margin, 7 were initially subjected to NB (36.8%) and 9 to IB (17.3%). CONCLUSION: Despite the advantages inherent to the percutaneous procedure of NB, IB must still be considered a diagnostic option in soft tissue tumors with high heterogeneity and degree of necrosis. Level of Evidence III; Diagnostic Studies - Investigating a Diagnostic Test .