Did any prior biopsy show Atypical Ductal Hyperplasia
(ADH) [taken from BX_ADH_YN from the Patient History form]
(numeric, code table).
NOTE 1: One case (9866712) had missing data for the elements BX_HX_LEFT and BX_HX_RIGHT on the Patient History form, but the ADH, ALH and LCIS questions on that form were answered No.  For consistency, these 3 elements were set to .M for this case.
NOTE 2: One case (9011509), BX_HX_LEFT and BX_HX_RIGHT are both equal to 0, but the ADH, ALH, LCIS questions on that form were answered No.  For consistency, these 3 elements were set to .N for this case.