Pityriasis rubra pilaris is an important disease to be aware of and understand. The differential diagnosis includes psoriasis, seborrheic dermatitis, phrynoderma, atypical keratosis pilaris ...

Circumscribed PRP affects approximately 25% of patients. It affects prepubertal children and it is characterized by sharply demarcated areas of follicular hyperkeratosis and erythema on the knees ...