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Images 10.98.1A: Perivascular dermatitis, and infundibulitis, spongiotic + 10.98.1B: Predominance of lymphocytes and scale-crusts at lips of infundibular ostia = Seborrheic dermatitis ¬†Mounds of scale-crust at lips of infundibular ostia are an important clue to diagnosis of seborrheic dermatitis. Spongiosis in infundibula is common in the condition and doubtlessly contributes to the formation of scale-crusts […]