Final answer:
Localized plaque psoriasis is a specific type of psoriasis that affects less than 5% of the body surface area.
Step-by-step explanation:
Localized plaque psoriasis refers to a specific type of psoriasis that affects less than 5% of the body surface area. It is characterized by raised, red patches of skin covered with silvery scales. The first-line treatment for localized plaque psoriasis is typically topical medications.