Linear comedo nevus.
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A 19-year-old young woman with linear comedo nevus is reported. The disorder was first noted al the age of 8 months. lt initially affected the ulnar region of the right hand and later on the lateral aspect of the right upper limb and shoulder with a linear distribution, probably along the Blaschko's lines. From a morphological point of view, the nevus was characterized by agminated papules, with a central, dark, comedo-like horny plug. The papules, were associated with scarring residua and sebum retention cysts. The biological and radiographic examinations were within normal limits. The ophthalmological and neurological visit were negative.