LINEAR POROKERATOSIS PRESENTING AS EROSIONS IN THE NEWBORN PERIOD

The classic appearance of porokeratosis is characterized by a hyperker atotic annular rim that expands peripherally, leaving an atrophic cent er. Linear porokeratosis is a variant with collections of such lesions arranged in a linear fashion, usually corresponding to a dermatome or Blaschko's lines. Ulcerations have rarely been reported in patients w ith porokeratosis. We report an unusual case of linear porokeratosis a t birth, with erosions and ulcerations of the face and lower extremity , that eluded diagnosis for nearly a year. Porokeratosis should be con sidered in the differential diagnosis of erosions in the newborn perio d.