Breast carcinomas of limited extent

Clinical trials established the value of breast‐conserving treatment (BCT) including the macroscopic removal of the tumor followed by local radiation therapy (RT) for Stage I and II invasive carcinomas. The occurrence of local tumor recurrence is related to the extent and multifocality of the tumor. Various studies aim to identify those tumors that could be proper candidates for conventional BCT. Furthermore, recent studies have focused on the identification of tumors that may be treated by breast‐conserving surgery alone without RT. Small, localized tumors theoretically should be the potential candidates for this type of treatment. The mammographic and pathologic criteria for the identification of tumors with limited extent are not yet established; furthermore, the optimal extent of the surgical excision and the method for margin examination are controversial.

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