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| #Apocrine change. | | #Apocrine change. |
| #Columnar cell change. | | #Columnar cell change. |
| #Duct ectasia
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| #*Dilation of large ducts secondary to luminal obstruction by inspissated secretions
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| #*Presentation
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| #**~age 40-50, possibly with cheesy nipple discharge
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| #*Pathology
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| #**Duct lumen dilated and containing foamy macrophages
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| #**Necrosis/shedding of epithelium
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| #**If duct rupture: chronic and granulomatous inflammation of periductal region
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| #**Fibrotic thickening of duct wall
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| <gallery>
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| Image:Breast DuctEctasia LP PA.JPG|Breast - Duct Ectasia - low power (SKB)
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| Image:Breast DuctEctasia MP2 PA.JPG|Breast - Duct Ectasia - low power (SKB)
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| Image:Breast DuctEctasia MP PA.JPG|Breast - Duct Ectasia - medium power (SKB)
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| </gallery>
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| #[[Fibroadenoma]]. | | #[[Fibroadenoma]]. |
| #*Abundant myxoid (light/blanched) stroma - very common. | | #*Abundant myxoid (light/blanched) stroma - very common. |