Final answer:
Purple, pruritic, polygonal, papules on physical exam should make you think of lichen planus as a possible diagnosis.
Step-by-step explanation:
Purple, pruritic, polygonal, papules on physical exam should make you think of lichen planus as a possible diagnosis. Lichen planus is a chronic inflammatory disease that affects the skin and mucous membranes. The characteristic papules are often purple, itchy, and have a polygonal shape. They can occur on various parts of the body, including the skin, oral mucosa, and genital area.