Key Difference –Petechiaevs Purpura vs Ecchymosis
Skin manifestations are one of the most vital signs that are frequently overlooked by patients as well as by some healthcare professionals. They often signify the prevalence of an underlying condition that requires medical attention. Not identifying these dermatological changes properly can put the patients’ lives in peril. Petechiae, purpura, and ecchymosis are three of the commonest manifestations that are predominantly associated with vasculitis. They can be seen in various other diseases also. Petechiae are pinhead-sized macules of blood in the skin. A large macule or a papule of blood that is not blanched by the application of pressure using a glass lens is identified as purpura whereas large extravasation of blood into the skin is known as ecchymosis. So the difference in these skin changes lies in their size. Thekey differencebetween Petechiae, Purpura and Ecchymosis is thatPetechiae are the smallest and ecchymoses are largest, Purpura is usually smaller than ecchymoses but larger than Petechiae.
What are Petechiae?
Causes of Petechiae
- Viral hemorrhagic fever
- Adverse effects of different drugs such as antidepressants and anticonvulsants
Before starting the management, the exact cause of Petechiae has to be identified. When there is an infection, appropriate anti-microbial agents have to be used to counter the infection. If the Petechiae is a result of adverse drug reactions, consider the replacement of those medications with some other drugs.
What is Purpura?
A large macule or a papule of blood that is not blanched by the application of pressure using a glass lens is identified as purpura.
Causes of Purpura
- Senile purpura which is due to weakening of capillary walls with age
- Schamberg’s disease
The underlying cause has to be identified and treated.
What is Ecchymosis?
A large extravasation of blood into the skin is known as ecchymosis.
- Some medications such as warfarin,antibiotics, and corticosteroids
- Bleeding disorders
Similar to the other two conditions, in ecchymosis also the underlying cause has to be aptly treated. Once that is done ecchymoses spontaneously disappear.
What is the Difference Between Petechiae Purpura and Ecchymosis?
|Purpura||A large macule or a papule of blood that is not blanched by the application of pressure using a glass lens is identified as purpura.|
|Ecchymosis||A large extravasation of blood into the skin is known as ecchymosis.|
|Petechiae||Petechiae are the smallest in size.|
|Purpura||Purpura is larger than Petechiae but smaller than ecchymoses.|
|Ecchymosis||Ecchymoses are the largest where there is widespread extravasation of blood.|
Summary – Petechiaevs Purpura vs Ecchymosis
瘀点在th大小斑点的血液e skin. A large macule or a papule of blood that is not blanched by the application of pressure using a glass lens is identified as purpura. Large extravasation of blood into the skin is known as ecchymosis. These skin changes are differentiated from each other according to their size. Petechiae are the smallest of the three and ecchymoses are the largest. Purpura is of moderate size. This is the difference between these three dermatological manifestations.
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1.Gawkrodger, David J. Dermatology: An Illustrated Colour Text. 3rd ed., Churchill Livingstone; 2002.
1.’Oral petechiae’By Mdscottis – Own work,(CC BY-SA 3.0)viaCommons Wikimedia
2.’Purpuraschoenleinhennoch’By Peter Rammstein – Own work,(CC BY 3.0)viaCommons Wikimedia
3.’shiner’by Katy Warner(CC BY-SA 2.0)viaFlickr