[Hemorrhagic pigmentary dermatoses]

According to morphologic differences or provoking factors, variants of hemorrhagic pigmentary dermatoses (HPD) have been reported under numerous names. Common characteristics of these disorders are grouped petechiae, eczematoid dermatitis and, in older lesions, hyperpigmentation due to hemosiderin deposits; these symptoms are usually seen on the lower extremities. Today, we suppose a uniform pathogenesis of the clinically varying types of HPD.