Abstract
Background
Fine needle aspiration cytology (FNAC) and core needle biopsy (CNB) are two outpatient procedures used in the differential diagnosis of a suspected bone tumor. Although open biopsy is a recommended procedure, its invasive nature mandates the search of a minimally invasive procedure for the diagnosis of a bone tumor prior to surgical resection or radio/chemotherapy. Therefore, the aim of this study was to compare the FNAC and CNB regarding their diagnostic accuracy in the diagnosis of primary bone tumor.
Material and methods
All patients suspected of having a bone neoplasm, who underwent FNAC or CNB and subsequent open biopsy or tumor resection during January 2011 to December 2012, were included in the study. Diagnostic accuracy, specific diagnostic rates, specificity, sensitivity, positive predictive value, and negative predictive value (NPV) were calculated for both the procedures, and the proportions were compared by Fischer’s exact test.
Results
A total of 117 patients of primary bone tumor were recruited in this retrospective study. A total sensitivity of 56.6 % and a specificity of 43.4 % were detected for FNAC compared to 78.2 and 95.8 % for CNB which was statistically significant (p values 0.0237 and <0.0001, respectively). The positive predictive value for both techniques was 100 %. The diagnostic accuracy of FNAC was 53 % compared to CNB which was 84.2 % (p value <0.0001). Specific diagnosis could be made in 36 out of 44 (81.8 %) FNAC procedures done, whereas specific diagnosis was made for 58 out of 59 (98.3 %) CNB procedures done (p value 0.0196).
Conclusion
In our study, CNB was found to have superior diagnostic accuracy, sensitivity, specificity, NPV, and specific diagnostic rates when compared to FNAC in diagnosing primary bone tumors. Therefore, CNB emerged as a safe and cost-effective method of diagnosis in bone tumors, although the combined efficiency of both the procedures in our setup needs to be explored further.
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Sharma, D., Krishna, K.V., Dhiman, P. et al. Fine needle aspiration cytology versus core needle biopsy in the diagnosis of primary bone tumors: a retrospective study. Eur Orthop Traumatol 6, 35–38 (2015). https://doi.org/10.1007/s12570-014-0277-8
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DOI: https://doi.org/10.1007/s12570-014-0277-8