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Eye (view source)

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===Anterior angle===
===Anterior angle===
*Angle between cornea and iris.
*Angle between cornea and iris.
===Canthi===
The canthi are where the upper and lower eyelids meet:
*Medial canthus.
*Lateral canthus.
Note:
*The most common malignant canthus lesion is [[basal cell carcinoma]].<ref>URL: [https://iovs.arvojournals.org/article.aspx?articleid=2372910 https://iovs.arvojournals.org/article.aspx?articleid=2372910]. Accessed on: 2022 Nov 17.</ref>


=Histology=
=Histology=
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==Eccrine hidrocystoma==
==Eccrine hidrocystoma==
*Occasionally spelled ''eccrine hydrocystoma''.<ref name=pmid10065300/>
*Occasionally spelled ''eccrine hydrocystoma''.<ref name=pmid10065300/>
===General===
{{Main|Eccrine hidrocystoma}}
*Benign.
*Eyelid lesion.
 
Clinical DDx:<ref name=pmid10065300/>
*Cystic [[BCC]].
 
===Microsopic===
Features:<ref name=pmid15205675>{{Cite journal  | last1 = Singh | first1 = AD. | last2 = McCloskey | first2 = L. | last3 = Parsons | first3 = MA. | last4 = Slater | first4 = DN. | title = Eccrine hidrocystoma of the eyelid. | journal = Eye (Lond) | volume = 19 | issue = 1 | pages = 77-9 | month = Jan | year = 2005 | doi = 10.1038/sj.eye.6701404 | PMID = 15205675 }}</ref><ref>{{Ref Derm|314}}</ref>
*Cyst lined by a bland bilayer.
**Inner lining cells have:
***Small, round nuclei - usu. basal.
***Moderate pale/greyish cytoplasm.
***No apocrine snouts - flat surface.
**Outer lining cells - spindled.
***May be difficult to see.
 
Note:
*According to the CMAJ, it has the histology of an [[epidermal inclusion cyst]].<ref name=pmid10065300>{{Cite journal  | last1 = Adams | first1 = SP. | title = Dermacase. Eccrine hydrocystoma. | journal = Can Fam Physician | volume = 45 | issue =  | pages = 297, 306 | month = Feb | year = 1999 | doi =  | PMID = 10065300 |PMC = 2328272 }}</ref>
 
DDx:
*[[Apocrine hidrocystoma]] - have apocrine snouts; surface is ''not'' flat.
*Cystadenoma - has epithelial proliferation.
 
====Image====
<gallery>
Image:SkinTumors-P7110453.JPG | Apocrine hidrocystoma (AH). AH looks similar to ''eccrine hidrocystoma''. (WC)
</gallery>
www:
*[http://www.nature.com/eye/journal/v19/n1/fig_tab/6701404f1.html Eccrine hidrocystoma (nature.com)].
*[http://www.dermnet.org.nz/pathology/apocrine-hidrocystoma-path.html Apocrine hidrocystoma (dermnet.org)].
*[http://www.flickr.com/photos/42574434@N03/9519309216 Apocrine hidrocystoma (flickr.com)].
 
===Sign out===
<pre>
SKIN LESION, ADJACENT TO RIGHT EYELID, EXCISION:
- ECCRINE HIDROCYSTOMA.
</pre>
 
====Micro====
The sections show hair bearing skin with a cyst lined by a bland bilayered epithelium.  The predominant lining cell has moderate pale grey cytoplasm and a small round nucleus. 
 
The lesion is excised in the plane of section.


==Chalazion==
==Chalazion==
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==Papilloma of the caruncle==
==Papilloma of the caruncle==
*[[AKA]] ''caruncle papilloma''.
{{Main|Eye papilloma}}
===General===
*Benign.
*Second most common caruncle tumour ~ 15% of caruncle tumours.<ref name=pmid16935590>{{Cite journal  | last1 = Kaeser | first1 = PF. | last2 = Uffer | first2 = S. | last3 = Zografos | first3 = L. | last4 = Hamédani | first4 = M. | title = Tumors of the caruncle: a clinicopathologic correlation. | journal = Am J Ophthalmol | volume = 142 | issue = 3 | pages = 448-55 | month = Sep | year = 2006 | doi = 10.1016/j.ajo.2006.04.035 | PMID = 16935590 }}</ref>
**Most common is [[nevus]] ~ 50% of caruncle tumours.
 
===Gross===
*Frond-like lesion.
 
Image:
*[http://www.atlasophthalmology.com/atlas/photo.jsf?node=2748&locale=en Papilloma of caruncle (atlasophthalmology.com)].
 
===Microscopic===
Features:<ref name=pmid16935590/>
*Fibrovascular fronds in a cauliflower-like arrangement.
*No nuclear atypia.
 
Image:
*[http://www.atlasophthalmology.com/atlas/photo.jsf?node=4686&locale=en Papilloma of caruncle - crappy image (atlasophthalmology.com)].
 
===Sign out===
<pre>
LESION, RIGHT CARUNCLE, EXCISION:
- PAPILLOMA.
- NEGATIVE FOR MALIGNANCY.
</pre>
 
====Micro====
The sections show benign conjunctival mucosa and a lesion consisting of fibrovascular
cores covered by a conjunctival epithelium with a cauliflower-like appearance at low
power. Parakeratosis is present. No significant nuclear atypia is identified. No koilocytic
change is seen. No mitotic activity is appreciated.
 
===External links===
*[http://eyewiki.aao.org/Conjunctival_Papilloma Conjunctival papilloma (eyewiki.aao.org)].


==Corneal ulcer==
==Corneal ulcer==
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- NEGATIVE for dysplasia.
- NEGATIVE for dysplasia.
</pre>
</pre>
==Conjunctival nevus==
{{Main|Conjunctival nevus}}


=Tumours of the eye=
=Tumours of the eye=
Michael
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