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*''extent'' refers to the size of the abnormal cell population within the papillary lesion. | *''extent'' refers to the size of the abnormal cell population within the papillary lesion. | ||
==Important Differential Diagnoses== | |||
===Papillary Lesions=== | |||
*Nipple adenoma | *Nipple adenoma | ||
*Intraductal papilloma | *Intraductal papilloma | ||
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===Spindle Cell Lesions=== | ===Spindle Cell Lesions=== | ||
*Metaplastic Breast Carcinoma | *Metaplastic Breast Carcinoma | ||
*Treated Breast Carcinoma | |||
*Mammary Myofibroblastoma | *Mammary Myofibroblastoma | ||
*Phyllodes Tumor - stromal component | *Phyllodes Tumor - stromal component |
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