Difference between revisions of "Ochronosis"
Jump to navigation
Jump to search
(+micro) |
(tweak) |
||
| Line 12: | Line 12: | ||
*[http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3470624/figure/f2-1841600/ Ochronosis - hip (nih.gov/CMAJ)]. | *[http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3470624/figure/f2-1841600/ Ochronosis - hip (nih.gov/CMAJ)]. | ||
==Microscopic== | |||
Features - cartilage: | Features - cartilage: | ||
*Deposits of (acellular) brown pigment (H&E sections) - '''key feature'''. | *Deposits of (acellular) brown pigment (H&E sections) - '''key feature'''. | ||
**May be dark magenta. | |||
Images: | |||
*[http://radiographics.rsna.org/content/31/4/1163/F12.expansion.html Ochronosis (rsna.org)].<ref name=pmid21768245/> | *[http://radiographics.rsna.org/content/31/4/1163/F11.expansion.html Ochronosis - cartilage (rsna.org)].<ref name=pmid21768245/> | ||
*[http://radiographics.rsna.org/content/31/4/1163/F12.expansion.html Ochronosis - soft tissue (rsna.org)].<ref name=pmid21768245/> | |||
==References== | ==References== | ||
Revision as of 13:35, 1 February 2013
Ochronosis is a disease characterized by the accumulation of homogentisic acid. It is subclassified as endogenous and exogenous.
The endogenous form is genetic and autosomal recessive.[1] Alcaptonuria is a specific genetic defect that causes ochronosis.[2]
Gross
- Tissue with blue-grey discolourization.[3]
- Affected tissues: articular and auricular cartilage, tendons, ligaments heart valves, sclera, cornea.
- Dark urine (after exposure to sunlight).
Images:
Microscopic
Features - cartilage:
- Deposits of (acellular) brown pigment (H&E sections) - key feature.
- May be dark magenta.
Images:
References
- ↑ Turgay, E.; Canat, D.; Gurel, MS.; Yuksel, T.; Baran, MF.; Demirkesen, C. (Dec 2009). "Endogenous ochronosis.". Clin Exp Dermatol 34 (8): e865-8. doi:10.1111/j.1365-2230.2009.03618.x. PMID 20055850.
- ↑ Online 'Mendelian Inheritance in Man' (OMIM) 203500
- ↑ 3.0 3.1 3.2 Baeva, M.; Bueno, A.; Dhimes, P.. "AIRP best cases in radiologic-pathologic correlation: ochronosis.". Radiographics 31 (4): 1163-7. doi:10.1148/rg.314105175. PMID 21768245.