Pigmented Purpuric

 

Lichenoid Dermatosis

 

(Gougerot and Blum)

 

In 1925, Gougerot and Blum reported a pigmented eruption on the lower extremity of a 41-year-old man. The distinguishing feature of this sub-type is the primary lesion, a reddish-brown polygonal or round lichenoid papule, in association with purpura or telangiectasia. Individual papules frequently coalesce into plaques with or without overlying scale. The term lichenoid describes the clinical appearance rather than a histologic feature. The color and morphology of the lesions can be mistaken clinically for Kaposi sarcoma . Like the other sub-types, this eruption is found on the lower extremities and, occasionally, the arms. It occurs in males more often than females and has a chronic course.