By definition: Petechiae are less than 4 millimeters (mm) in diameter. Purpura are between 4 mm and 10 mm in size. Areas that are larger than 10 mm are referred to as ecchymosis, also known as ...

Purpura associated with acquired rubella ... was an unusual incidence of periorbital and palatine ecchymoses and 2 cases of generalized petechiae. This outbreak occurred in a small, isolated ...