The terms petechiae, purpura, and ecchymoses all describe:
a. Varying degrees of thrombocytopenia
b. Varying degrees of thrombocythemia
c. Varying qualitative platelet disorders
d. Varying size hemorrhages into the skin because of small-vessel bleeding
ANS: D
These terms all refer to small-vessel bleeding into the skin that is caused by thrombocytopenia or many of the qualitative platelet disorders. Petechiae are small pinpoint hemorrhages, purpura are about 1 cm in diameter, whereas ecchymoses are 3 cm or larger.
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