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URBANA ATLAS OF PATHOLOGY

Image Number 51 - Pleura, pleural petechiae

Petechiae are round pinpoint hemorrhages of the skin or mucosae. Ecchymoses are hemorrhages of the skin or mucosae which are larger than petechiae. Like petechiae, ecchymoses are not raised but may be irregular in shape. Purpura is often used as a general term to denote bleeding into the skin or mucosae such as ecchymoses and petechiae. Technically speaking, purpura are hemorrhages less than 1 cm in diameter (however, not many people follow this definition). In this specimen, both petechiae and ecchymoses are seen, both of which are examples of purpura.

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