“…The relationship between GCBD and BC represents the main conundrum. Although several studies have indicated GCBD as a precancerous lesion with higher risk of subsequent BC development [5,6,26,32,42,47,57,61,63], others have not [9,15,29,36,39,44,46,58,60,64,71,72]. Controversial results have also been obtained for different risk profiles of apocrine and flattened subtypes of gross cysts, suggesting that the lack of standardization does not prevent adoption of BCF biomarkers as useful diagnostic tools.…”