Breast Cancers: High-Risk Breast Lesions
- Atypical ductal hyperplasia diagnosed on core biopsy requires excision because of the risk of cancer present at the site, but expert histologic review may be helpful because of the risk of misdiagnosis.
- Pleomorphic lobular carcinoma in situ should be treated as ductal carcinoma in situ based on its behavior and greater risk of associated invasive disease.
- Excision of pseudoangiomatous stromal hyperplasia has been questioned because of limited data suggesting that imaging discordance and the presence of suspicious clinical findings are the primary risk factors for associated cancer, and their absence may permit safe observation.








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