Two Cases of Pityriasis Rotunda / 대한피부과학회지

ABSTRACT

Fifty six year old woman with liver cirrhosis and 31 year old man in good health had similar skin lesions which were well-defined, round to oval, isolated or confluent, scaly brown patches on her lower back, and his trunk and thighs, respectively, without any symptom. The biopsy specimens taken from the lesions showed slight hyperkeratosis with occasional follicular pluggings, presence of a granular layer, and epidermal flattening in case 1; increased melanin pigment in the basal layer in case 2. In both cases, the upper dermis revealed minirnal perivascular lymphohistiocytic inf iltration. We, therefore, present two cases of pityriasis rotunda and review the literature.