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General
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Epidemiology
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Sites
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Etiology
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Case reports
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Gross description
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Gross images
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Well-circumscribed mass

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Small cysts

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Courtesy of Dr. Mark R. Wick

Micro description
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Micro images
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Well circumscribed

Invasive carcinoma

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Focus of hyperplasia

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Actively secreting epithelial cells

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Greatly expanded lobules

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Apical cytoplasmic blebs

Lactating adenoma

Stroma and dilated ectatic glands - H&E

Infarcted lactating adenoma - A: edge of infarction, B: hemosiderin laden macrophages, C: peripheral fibrosis, D: viable tumor, E: capsule

Orderly arrangement of glands

Clear vacuolization

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Courtesy of Dr. Mark R. Wick

Cytology description
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Cytology images
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FNAB, courtesy of Dr. Mark R. Wick

Increased lobular size

Cytoplasmic vacuoles and background foamy material

Differential diagnosis
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Additional references
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End of Breast - nonmalignant > Benign tumors / changes > Lactating adenoma of breast



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