Difference between revisions of "Apocrine metaplasia of the breast"

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'''Apocrine metaplasia of the breast''', also '''apocrine metaplasia''', is a benign change in the breast without increased risk of malignancy.
'''Apocrine metaplasia of the breast''', also '''apocrine metaplasia''', is a benign change in the [[breast]] without increased risk of malignancy.


==General==
==General==
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===Etiology===
===Etiology===
*Increased number of mitochondria.
*Increased number of mitochondria.
**In other body sites this has different names, e.g. ''[[Hurthle cell change]]'' (thyroid), ''[[oncocytoma|oncocytic]] change'' (kidney - [[oncocytoma]], thyroid).
**In other body sites this has different names, e.g. ''Hurthle cell change'' (thyroid), ''[[oncocytoma|oncocytic]] change'' (kidney).
 
==Gross==
*Blue dome cysts.<ref name=pmid25610180>{{Cite journal  | last1 = Rodrigues | first1 = G. | last2 = Prabhu | first2 = R. | last3 = Nair | first3 = R. | last4 = Thinda | first4 = R. | title = A blue-domed cyst of bloodgood. | journal = Eurasian J Med | volume = 43 | issue = 2 | pages = 132 | month = Aug | year = 2011 | doi = 10.5152/eajm.2011.30 | PMID = 25610180 }}</ref>


==Microscopic==
==Microscopic==
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**Prominent nuclear membrane.
**Prominent nuclear membrane.
**Prominent, often single nucleolus.
**Prominent, often single nucleolus.
*+/-Luminal papillary tufts.<ref>URL: [http://www.breastpathology.info/Benign%20proliferative%20disease.html http://www.breastpathology.info/Benign%20proliferative%20disease.html]. Accessed on: May 9, 2016.</ref>


Note:  
Note:  
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===Images===
===Images===
====Case====
<gallery>
Image: Apocrine metaplasia -- low mag.jpg | AM - low mag.
Image: Apocrine metaplasia -- intermed mag.jpg | AM - intermed. mag.
Image: Apocrine metaplasia -- high mag.jpg | AM - high mag.
Image: Apocrine metaplasia -- very high mag.jpg | AM - very high mag.
Image: Apocrine metaplasia - alt -- very high mag.jpg | AM - very high mag.
</gallery>
====Others====
<gallery>
<gallery>
Image:Fibrocystic_change_-_very_high_mag.jpg | FCC with apocrine metaplasia (right bottom of image) - high mag. (WC/Nephron).
Image:Fibrocystic_change_-_very_high_mag.jpg | FCC with apocrine metaplasia (right bottom of image) - high mag. (WC/Nephron).

Latest revision as of 21:36, 9 May 2016

Apocrine metaplasia of the breast, also apocrine metaplasia, is a benign change in the breast without increased risk of malignancy.

General

  • Benign/not significant. Can be considered to be pretty wallpaper in the house of breast pathology.
  • Very common in adults.
  • Apocrine lesions as a group are usually benign, some pre-neoplastic and some malignant.[1]

Etiology

  • Increased number of mitochondria.
    • In other body sites this has different names, e.g. Hurthle cell change (thyroid), oncocytic change (kidney).

Gross

  • Blue dome cysts.[2]

Microscopic

Features:

  • Eosinophilic cytoplasm - key feature.
  • Voluminous pink cytoplasm.
  • Apocrine snouts may be present.
    • Small protrusiona at the apical aspect of the cell (composed of cytoplasm and plasma membrane).
  • Central round nucleus
    • Prominent nuclear membrane.
    • Prominent, often single nucleolus.
  • +/-Luminal papillary tufts.[3]

Note:

  • Apocrine changes, i.e. cytoplasmic eosinophilia, can appear in malignant tumours; eosinophilia doesn't make something benign.

Images

Case

  • AM - low mag.

  • AM - intermed. mag.

  • AM - high mag.

  • AM - very high mag.

  • AM - very high mag.

Others

  • FCC with apocrine metaplasia (right bottom of image) - high mag. (WC/Nephron).

  • Breast - Apocrine Change - high power (SKB)

Sign out

  • Typically not reported.

See also

References

  1. ↑ Wells, CA.; El-Ayat, GA. (Dec 2007). "Non-operative breast pathology: apocrine lesions.". J Clin Pathol 60 (12): 1313-20. doi:10.1136/jcp.2006.040626. PMID 18042688.
  2. ↑ Rodrigues, G.; Prabhu, R.; Nair, R.; Thinda, R. (Aug 2011). "A blue-domed cyst of bloodgood.". Eurasian J Med 43 (2): 132. doi:10.5152/eajm.2011.30. PMID 25610180.
  3. ↑ URL: http://www.breastpathology.info/Benign%20proliferative%20disease.html. Accessed on: May 9, 2016.
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