Purpura is extravasation of red blood cells into the skin or mucous membrane. The differential diagnosis for purpura can be done using the lesion morphology in addition to clinical and laboratory findings. Clinical Terms: Retiform purpura : Stellate lesions with angular or geometric borders. Mostly palpable plaques present. Petechiae : Macules ≤4 mm, flat lesions, primarily bright red and then fade to a rust color.
Ecchymosis : Macules >5 mm, flat lesions, primarily red or purple and then may fade to yellow, brown, or green. Palpable purpura : Elevated, round or oval, red or purple papules, barely palpable. The prognosis of pediatric immune thrombocytopenic purpura (ITP) has a favorable prognosis, but it is difficult to predict the course of this disease at the time of diagnosis. Causes of nonthrombocytopenic purpura: Medicines that affect platelet formation Genetic disorders like…
