Final answer:
Salmon-pink plaques with silvery scales are characteristic of psoriasis, a skin condition that leads to itchy or sore patches on various body parts, differentiating it from other skin disorders like eczema or pityriasis rosea.
Step-by-step explanation:
The description of salmon-pink plaques with silvery scales is highly indicative of psoriasis. Psoriasis is a chronic skin condition characterized by itchy or sore patches of thick, red skin covered with silvery scales. These patches often appear on the elbows, knees, scalp, back, face, palms, and feet. The disease is associated with abnormal skin cell turnover, which leads to these distinctive plaques.
In contrast, eczema presents as a red, flaky rash and does not typically have silvery scales. Dermatitis herpetiformis is characterized by an itchy, blistering rash, and pityriasis rosea often starts with a single patch before developing a distinctive pattern of similar patches across the body.