Diagnosis: Porokeratosis
Description: Annular plaques with keratotic rim.
Morphology: Annular
Site: Leg
Sex: F
Age: 34
Type: Clinical
Submitted By: Nameer Al-Sudany
Differential Diagnosis
History: Asymptomatic, annular, keratotic plaques with firm raised edges on the right shin of one year duration. Skin biopsy revealed the characteristic histological picture of porokeratosis.