Reporting terminology
      To maximize the mutual understanding and to improve  the diagnostic standardization all  breast  FNA’s cytology specimens should be coded using one of the following five  reporting categories as defined by the U.K. Breast Screening Programme in 1993.  These categories are:
      C1: Inadequate
        C2: Benign
        C3: Atypia probably benign
        C4: Suspicious of malignancy
        C5: Malignant