Difference between revisions of "Eye"
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m (→Histology: +Eccrine hidrocystoma) |
(+Pterygium) |
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*The muscles that move the eye have a high nerve:muscle ratio = ~1:4.<ref>Bilbao. 24 November 2010.</ref> | *The muscles that move the eye have a high nerve:muscle ratio = ~1:4.<ref>Bilbao. 24 November 2010.</ref> | ||
**Other muscles in the body ~1:250. | **Other muscles in the body ~1:250. | ||
Conjunctiva:<ref>URL: [http://www.lab.anhb.uwa.edu.au/mb140/corepages/eye/eye.htm http://www.lab.anhb.uwa.edu.au/mb140/corepages/eye/eye.htm]. Accessed on: 20 October 2011.</ref> | |||
*Stratified squamous. | |||
**May be stratified columnar | |||
*Goblet cells. | |||
==Pterygium== | |||
===General=== | |||
*Scleral lesion | |||
**Sclera = white part of the eye.<ref>URL: [http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0002006/ http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0002006/]. Accessed on: 20 October 2011.</ref> | |||
*Benign. | |||
*Assoc. with sun exposure. | |||
Image: | |||
*[http://trialx.com/curebyte/2011/05/31/what-does-pterygium-look-like/ Pterygium - gross (trialx.com)]. | |||
===Microscopic=== | |||
Features: | |||
*Dilated vessels. | |||
*Solar elastosis. | |||
**Dense gray/light brown acellular material. | |||
Image: | |||
*[http://www.uic.edu/depts/mcpt/eyepath/specco4.htm Pterygium (uic.edu)]. | |||
==Eccrine hidrocystoma== | ==Eccrine hidrocystoma== | ||
Revision as of 19:18, 20 October 2011
The eye is rarely seen by pathologists. They go to neuropathologists.
An introduction to neuropathology is in the neuropathology article.
Histology
- The muscles that move the eye have a high nerve:muscle ratio = ~1:4.[1]
- Other muscles in the body ~1:250.
Conjunctiva:[2]
- Stratified squamous.
- May be stratified columnar
- Goblet cells.
Pterygium
General
- Scleral lesion
- Sclera = white part of the eye.[3]
- Benign.
- Assoc. with sun exposure.
Image:
Microscopic
Features:
- Dilated vessels.
- Solar elastosis.
- Dense gray/light brown acellular material.
Image:
Eccrine hidrocystoma
General
- Benign.
- Eyelid lesion.
Clinical DDx:[4]
- Cystic BCC.
Microsopic
Features:
- Same histology as epidermal inclusion cyst.[4]
Retinoblastoma
General
- Rare.
- Malignant.
- May be familial.[5]
Microscopic
Features:
- Small round cell tumour.
- Flexner-Wintersteiner rosette - key feature.
- Rosette with empty centre (donut hole).[6]
- +/-Homer-Wright rosette.[7]
- Circular rosette with neuropil at the centre.[6]
Image:
Notes:
- DDx of Flexner-Wintersteiner rosette includes: pineoblastomas, medulloepitheliomas.
Retinal hemorrhage
Image:
See also
References
- ↑ Bilbao. 24 November 2010.
- ↑ URL: http://www.lab.anhb.uwa.edu.au/mb140/corepages/eye/eye.htm. Accessed on: 20 October 2011.
- ↑ URL: http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0002006/. Accessed on: 20 October 2011.
- ↑ 4.0 4.1 Adams, SP. (Feb 1999). "Dermacase. Eccrine hydrocystoma.". Can Fam Physician 45: 297, 306. PMC 2328272. PMID 10065300. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2328272/.
- ↑ Lohmann D (2010). "Retinoblastoma". Adv. Exp. Med. Biol. 685: 220–7. PMID 20687510.
- ↑ 6.0 6.1 Wippold FJ, Perry A (March 2006). "Neuropathology for the neuroradiologist: rosettes and pseudorosettes". AJNR Am J Neuroradiol 27 (3): 488–92. PMID 16551982.
- ↑ WH. 14 March 2011.
- ↑ URL: http://library.med.utah.edu/WebPath/EXAM/IMGQUIZ/fofrm.html. Accessed on: 6 December 2010.