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Diagnosing musculoskeletal tumours: How accurate is CT-guided core needle biopsy?
European Journal of Surgical Oncology 2016 July
INTRODUCTION: Biopsy is a critical juncture in the diagnostic process for evaluating musculoskeletal tumours. The traditional diagnostic standard of open biopsy yields highly accurate diagnoses but associated with it is a significant rate of procedural complications. Imaging-guided needle biopsy is now being widely adopted as a competitive and minimally-invasive alternative with significantly lower complication rates. We assess its diagnostic outcomes at a tertiary referral centre in Melbourne, Australia.
METHOD: Data pertaining to biopsy and surgical histology were retrieved from the musculoskeletal tumour database at St Vincent's Hospital, Fitzroy following approval from the Human Research Ethics Committee (HREC 091/13). Data analyses were performed in STATA 12 to assess diagnostic parameters and related outcomes.
RESULTS: Bone tumours (n = 380) yielded accuracy of 80.8% with diagnostic error of 7.1% and undiagnostic rates of 12.1%. Soft-tissue tumours (n = 751) yielded accuracy of 83.2% with diagnostic error of 10.5% and undiagnostic rates of 6.3%. Biopsy of benign tumours (n = 648, accuracy = 85.3%, error = 5.9%, undiagnostic 8.8%) was more accurate than malignant tumours (n = 501, accuracy = 75.8%, error 14.0%, undiagnostic 7.4%). The overall procedural complication rate was 0.7%.
DISCUSSION: CT-guided core needle biopsy is a safe, accurate, and highly effective procedure that obviates the need for open and surgical biopsy in a significant number of cases. When combined with fusion imaging, CT guidance is an accurate method of targeting specific regions of interest.
METHOD: Data pertaining to biopsy and surgical histology were retrieved from the musculoskeletal tumour database at St Vincent's Hospital, Fitzroy following approval from the Human Research Ethics Committee (HREC 091/13). Data analyses were performed in STATA 12 to assess diagnostic parameters and related outcomes.
RESULTS: Bone tumours (n = 380) yielded accuracy of 80.8% with diagnostic error of 7.1% and undiagnostic rates of 12.1%. Soft-tissue tumours (n = 751) yielded accuracy of 83.2% with diagnostic error of 10.5% and undiagnostic rates of 6.3%. Biopsy of benign tumours (n = 648, accuracy = 85.3%, error = 5.9%, undiagnostic 8.8%) was more accurate than malignant tumours (n = 501, accuracy = 75.8%, error 14.0%, undiagnostic 7.4%). The overall procedural complication rate was 0.7%.
DISCUSSION: CT-guided core needle biopsy is a safe, accurate, and highly effective procedure that obviates the need for open and surgical biopsy in a significant number of cases. When combined with fusion imaging, CT guidance is an accurate method of targeting specific regions of interest.
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