What are the four P's of lichen planus?

The four P's of lichen planus are accurately represented by the terms Purple, Polygonal, Pruritic, and Papule. This dermatitis condition is characterized by its distinctive appearance and symptoms.

"Purple" refers to the typical color of the lesions, which are often a violaceous hue. "Polygonal" describes the shape of the lesions, which commonly have angular edges, giving them a unique geometric appearance. "Pruritic" indicates that the lesions are usually itchy, which is a significant symptom for patients. Lastly, "Papule" signifies the type of lesion; lichen planus typically presents as small, raised bumps on the skin.

Understanding these descriptors helps in the clinical identification of lichen planus, enabling appropriate diagnosis and management. The terms in the other choices do not accurately describe the classic presentation of lichen planus and do not align with the commonly accepted criteria used in dermatology.