Vascular Skin Lesions - Differential Diagnosis Algorithm

 - Petechiae < 0.2 cm diameter

 - Purpura 0.2 - 1.0 cm diameter

 - Ecchymosis > 1 cm diameter

Blanches with Pressure - Small, dilated superficial blood vessels

 • Telangiectasia

Does not blanche with pressure - Erythematous or violaceous discolorations of skin due to extravasation of RBCs in dermis

 • Congenital - Hemangioma

 • Acquired - Vasculitis



#Vascular #Vasculitis #SkinRash #dermatology #Differential #Diagnosis #Algorithm #causes