The Full Wiki

Petechia: Wikis

  
  

Note: Many of our articles have direct quotes from sources you can cite, within the Wikipedia article! This article doesn't yet, but we're working on it! See more info or our list of citable articles.

Encyclopedia

From Wikipedia, the free encyclopedia

Petechia
Petechiaesmall.jpg

Multiple small petechiae.
ICD-10 R23.3
ICD-9 782.7
MeSH D011693

A petechia (pronounced /pɨˈtiːkiə/, plural petechiae /pɨˈtiːkɪ.iː/) is a small (1-2mm) red or purple spot on the body, caused by a minor hemorrhage (broken capillary blood vessels)[1].

The most common cause of petechiae is through physical trauma such as a hard bout of coughing, vomiting or crying, which can result in facial petechiae, especially around the eyes. Petechiae in this instance are completely harmless and usually disappear within a few days. Petechiae may be a sign of thrombocytopenia (low platelet counts) when platelet function is inhibited (e.g., as a side effect of medications or during certain infections), or in clotting factor deficiencies[1]. They may also occur when excessive pressure is applied to tissue (e.g., when a tourniquet is applied to an extremity or with excessive coughing).

If unsure, petechiae should always be quickly investigated. They can be interpreted as vasculitis, an inflammation of the blood vessels, which requires immediate treatment to prevent permanent damage. Some malignancies can also cause petechiae to appear. Petechiae should be investigated by a skilled health care provider immediately to rule out the more dangerous conditions. Dermatologists can be the most helpful specialists in these conditions because they can more easily identify if the condition is petechiae or some similar looking but less worrisome rash.

The significance of petechiae in children depends on the clinical context in which they arise. Petechiae in children can occur with viral infections. In this instance, they do not necessarily signify a serious illness. However, they are a hallmark signal of some potentially serious illnesses, such as meningococcemia, leukemia, and certain causes of thrombocytopenia. Therefore, their presence should not be ignored.

Contents

Associated conditions

Infections
Non-infectious conditions
Non-diseases

Forensics

Petechiae on the face and conjunctiva (eyes) are a sign of a death by asphyxiation. They are thought to result from an increase of pressure in the veins of the head and hypoxic damage to endothelial of blood vessels.[3]

See also

References

  1. ^ a b Kumar, Vinay; Abbas, Abul K.; Fausto, Nelson; & Mitchell, Richard N. (2007). Robbins Basic Pathology (8th ed.). Saunders Elsevier. p. 86 ISBN 978-1-4160-2973-1
  2. ^ Grayson MD, Charlotte (2006-09-26). "Typhus". MedlinePlus Medical Encyclopedia. National Institutes of Health. http://www.nlm.nih.gov/medlineplus/ency/article/001363.htm. Retrieved 2007-11-05.  
  3. ^ Ely, Susan F.; Charles S. Hirsch (2000). "Ashpyxial deaths and petechiae: a review" (PDF). Journal of Forensic Science 45 (6): 1274–1277. http://www.charlydmiller.com/LIB04/2000petechiaereview.pdf. Retrieved 2007-09-22.  







Got something to say? Make a comment.
Your name
Your email address
Message