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| ==Collagenous spherulosis== | | ==Collagenous spherulosis== |
| *[[AKA]] ''mucinous spherulosis'', [[AKA]] ''spherulosis''.<ref name=stanford_collspher>URL: [http://surgpathcriteria.stanford.edu/breast/collspher/ http://surgpathcriteria.stanford.edu/breast/collspher/]. Accessed on: 4 September 2011.</ref> | | *[[AKA]] ''mucinous spherulosis'', [[AKA]] ''spherulosis''.<ref name=stanford_collspher>URL: [http://surgpathcriteria.stanford.edu/breast/collspher/ http://surgpathcriteria.stanford.edu/breast/collspher/]. Accessed on: 4 September 2011.</ref> |
| ===General===
| | {{Main|Collagenous spherulosis}} |
| *Benign.
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| *Almost always an incidental finding.
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| *Can mimic [[ADH]], [[cribriform DCIS]], [[adenoid cystic carcinoma of the breast|adenoid cystic carcinoma]].<ref name=pmid16330938>{{Cite journal | last1 = Resetkova | first1 = E. | last2 = Albarracin | first2 = C. | last3 = Sneige | first3 = N. | title = Collagenous spherulosis of breast: morphologic study of 59 cases and review of the literature. | journal = Am J Surg Pathol | volume = 30 | issue = 1 | pages = 20-7 | month = Jan | year = 2006 | doi = | PMID = 16330938 }}</ref>
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| **Epidemiologically, it may be associated with [[LCIS]].<ref name=pmid16330938/>
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| ===Microscopic===
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| Features:<ref name=stanford_collspher>URL: [http://surgpathcriteria.stanford.edu/breast/collspher/ http://surgpathcriteria.stanford.edu/breast/collspher/]. Accessed on: 4 September 2011.</ref><ref>URL: [http://www.hsc.stonybrook.edu/breast-atlas/V-33.htm http://www.hsc.stonybrook.edu/breast-atlas/V-33.htm]. Accessed on: 31 August 2011.</ref>
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| *Tubular/cribriform architecture.
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| *Intratubular eosinophilic material - '''key feature'''.
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| **Classical: Arranged like the spokes of a wheel ("radial spikes").
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| **Atypical: Granules ~ 1-2 micrometers.
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| *No mitotic activity.
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| *Two cells populations (epithelial & myoepithelial) - like a well-behaved breast gland.
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| Notes:
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| *Usually small lesions: < 50 spherules per lesion, <100 micrometers.
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| *May be multifocal.
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| *+/-Calcifications - may prompt biopsy.
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| DDx:
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| *[[Atypical ductal hyperplasia]].
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| *[[Cribriform DCIS]].
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| *[[Adenoid cystic carcinoma of the breast]].
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| ====Images====
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| <gallery>
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| Image:Collagenous_spherulosis_-_intermed_mag.jpg | Collagenous spherulosis - intermed. mag. (WC/Nephron)
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| Image:Collagenous_spherulosis_-_very_high_mag.jpg | Collagenous spherulosis - very high mag. (WC/Nephron)
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| </gallery>
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| www:
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| *[http://www.hsc.stonybrook.edu/breast-atlas/V-33.htm Collagenous spherulosis (stonybrook.edu)].
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| ==Nipple adenoma== | | ==Nipple adenoma== |