Dictionary > Petechia


noun, plural: petechiae
An initially purplish red spot (less than 3 mm in diameter) that later turns blue or yellow on the body surface (i.e. skin or mucous membrane) due to a small intradermal or submucous hemorrhage
Haematoma is a localised collection of blood, usually clotted, in an organ, space or tissue, due to a break in the wall of a blood vessel. It may be classified according to the degree affected. It may be petechiae, purpura, or ecchymosis.
A petechia is an initially purplish red spot that eventually turns blue or yellow. It is caused by a small intradermal or submucous hemorrhage. It has a diameter of 1 to 2 mm, or basically less than 3 mm, making it smaller than ecchymoses or purpura.
The petechiae are very small, perfectly rounded spot on the body surface like skin. The most common cause is physical trauma, such as coughing, vomiting or crying that may lead to formation of petechiae in the face, especially around the eyes. In other cases, petechiae can be a sign of thrombocytopenia or clotting factor deficiencies.
Word origin: from Italian petecchie, pl. of petecchia, spot on skin, from Vulgar Latin petīcula
See also:

You will also like...

Fossil trilobite imprint in the sediment

There are more species of insects than any other species combined. This surely illustrates that insects have the selecti..

Animal Water Regulation

Animals adapt to their environment in aspects of anatomy, physiology, and behavior. This tutorial will help you understa..

Physiological Homeostasis
Physiological Homeostasis

Homeostasis is essential to maintain conditions within the tolerable limits. Otherwise, the body will fail to function p..

Cell Biology
Cell Biology

The cell is defined as the fundamental, functional unit of life. Some organisms are comprised of only one cell whereas o..

An artist depiction of a Precambrian multicellular life form.
The Evolution of Cell Organelles

The nucleus containing the genetic material, DNA, and the mitochondria, well-identified as the "powerhouse of the cell",..

Nephrolepis exaltata
Vascular Plants: Ferns and Relatives

Ferns and their relatives are vascular plants, meaning they have xylem and phloem tissues. Because of the presence of va..