Hollenhorst plaque

Hollenhorst plaque

A Hollenhorst plaque is a cholesterol embolus that is seen in a blood vessel of the retina. It is usually seen when a physician performs ophthalmoscopy, during which a plaque will appear bright, refractile, and yellow. It is caused by an embolus lodged within the retinal vessel that originated from an atheromatous plaque in a more proximal (upstream) vessel, usually the internal carotid artery. It is often an indication of a previous ischemic episode in the eye and is a sign of severe atherosclerosis. The most important step in management is to identify and treat the originating plaque to prevent further embolization.

The phenomenon is named after the American ophthalmologist Dr Robert Hollenhorst (1913-2008) who first described their significance in 1961. [cite journal | author=Hollenhorst RW | title=Significance of bright plaques in theretinal arterioles | journal=JAMA 1961 | volume=178 | pages=23-29 | pmid=13908419]

References

External links

* [http://www.revoptom.com/HANDBOOK/sect5l.htm Handbook of ocular diseases.]
* [http://dro.hs.columbia.edu/hollenhorst.htm Columbia U.]


Wikimedia Foundation. 2010.

Игры ⚽ Поможем написать реферат

Look at other dictionaries:

  • Hollenhorst plaques — atheromatous emboli containing cholesterol crystals in the retinal arterioles, a warning sign of impending serious cardiovascular disease such as stroke, myocardial infarction, aortic aneurysm, or occlusion of the retinal arterioles. Hollenhorst… …   Medical dictionary

  • Plaque — (1) An semi hardened accumulation of substances from fluids that bathe an area. Examples include dental plaque and cholesterol plaque. Minerals form dental plaque around the teeth as a result of bacterial action on food particles. Dental plaque… …   Medical dictionary

  • Hollenhorst plaques — Hol·len·horst plaques (holґən horst) [Robert W. Hollenhorst, American ophthalmologist, 1913–2008] see under plaque …   Medical dictionary

  • Hollenhorst — Robert W., U.S. ophthalmologist, *1913. See H. plaques, under plaque …   Medical dictionary

  • Dalrymple's sign — is a widened palpebral (eyelid) opening, or eyelid spasm, seen in thyrotoxicosis (as seen in Graves disease, exophthalmic Goitre and other hyperthyroid conditions), causing abnormal wideness of the palpebral fissure. As a result of the retraction …   Wikipedia

  • Dix–Hallpike test — Diagnostics ICD 9 CM 95.46 The Dix–Hallpike test[1] or Nylen Barany test is a diagnostic maneuver used to identify …   Wikipedia

  • Cholesterol embolism — Classification and external resources ICD 9 445 DiseasesDB 2567 …   Wikipedia

  • Embolie de cholestérol — L’embolie de cholestérol est une forme particulière d’embolie artérielle où il y a migration de cristaux de cholestérol, provenant le plus souvent d’une rupture d’une plaque d’athérome vers la distalité de l’arbre artériel. Elle se distingue de… …   Wikipédia en Français

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”