In recent years there has been increased use of core biopsy for the preoperative diagnosis of screen detected and symptomatic breast lesions. The aim of this study was to compare the quality assessment parameters for preoperative diagnosis by fine needle aspiration cytology (FNAC) before conversion to core biopsy with those for core biopsy after conversion in screening and symptomatic practice. Accuracy of typing and grading of tumours on core biopsy was assessed.
