A 40-year-old woman asks about her future risk of developing breast cancer after undergoing a core needle biopsy for a mammographic abnormality. Arrange the following potential histopathologic biopsy results in order from the LOWEST to the HIGHEST risk for the subsequent development of invasive breast cancer.
- 1Simple breast cyst
- 2Intraductal papilloma without atypia
- 3Atypical ductal hyperplasia
- 4Ductal carcinoma in situ
Answer
The correct sequence from lowest to highest risk is: Simple breast cyst, Intraductal papilloma without atypia, Atypical ductal hyperplasia, and Ductal carcinoma in situ.
Breast pathology findings are clinically classified by their associated risk for the subsequent development of invasive breast cancer. Nonproliferative lesions (e.g., simple cysts, mild hyperplasia, simple fibroadenomas) do not elevate this risk above that of the general population. Proliferative lesions without atypia (e.g., intraductal papillomas, complex fibroadenomas, moderate or florid hyperplasia, sclerosing adenosis) convey a slightly increased relative risk. Proliferative lesions with atypia (e.g., atypical ductal or lobular hyperplasia) carry a moderately increased relative risk, warranting closer surveillance. Finally, carcinoma in situ (e.g., ductal carcinoma in situ) is considered a pre-malignant lesion with the highest relative risk of progression to invasive disease among these categories.
Step-by-Step Solution
Key Concept
Breast pathology findings are stratified by their future risk of invasive breast cancer: nonproliferative (no increased risk), proliferative without atypia (slight increase), proliferative with atypia (moderate increase), and carcinoma in situ (high risk).