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52 yo women comes to physician after noticiing lump in left breast. Vitals are normal. Physical exam shows: Firm, palpable, immobile mass in upper outer quadrant. No evidence of nipple or skin retraction or axillary lymphadenopathy. Right breast is free of masses or nipple dishcharge. Mammogram reveals a 3 cm ill defined lesion without calcifications. Lumpectomy shows on microscopy small infiltrating glandular strucutres lined by poorly differentiated cells surrounded by desmoplastic stroma, minimal lymphocytic infiltrate. 1. What is most likely diagnosis and why?

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The development of the reproductive system begins with the formation of undifferentiated gonads and the paired mesonephric and paramesonephric ducts.


1. 52 yo women comes to physician after noticiing lump in left breast. Vitals are normal. Physical exam shows: Firm, palpable, immobile mass in upper outer quadrant. No evidence of nipple or skin retraction or axillary lymphadenopathy. Right breast is free of masses or nipple dishcharge. Mammogram reveals a 3 cm ill defined lesion without calcifications. Lumpectomy shows on microscopy small infiltrating glandular strucutres lined by poorly differentiated cells surrounded by desmoplastic stroma, minimal lymphocytic infiltrate. 1. What is most likely diagnosis and why?





 
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