A clinical study on pityriasis rosea

A clinical study on pityriasis rosea

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Pityriasis rosea is an acute inflammatory dermatosis of unknown etiology with a self-limited course.Fifty patients of pityriasis rosea attending out patient department of our hospital were selected for the study and the data was analysed.In the present 4 Channel LOC study out of 50 cases, 30(60%)were males and 20(40%)were females, giving male: female ratio 1.5:1.Majority of the patients 16(32%) were seen in the age group of 11-20 years.

Precipitating factors include wearing new garments in 10(20%) patients, drugs in 5(10%) and both new garment and drug in 1(2%) patient.Thirty five (70%) patients presented with herald Stove Knob Decal patch and the distributions of secondary eruptions were mainly on the trunk among 47(94%) patients.Classical pityriasis rosea (62%) was the commonest morphologic type, followed by atypical pityriasis rosea (38%) which include absence of herald patch (30%), localized pityriasis rosea (4%) and inverse pityriasis rosea and papulo -vesicular pityriasis rosea (2%) each.