Which description best defines a nodule?

• A. A plateau-like lesion >10 mm
• B. Papular growth >5 mm
• C. Circumscribed, elevated lesion containing pus
• D. Vesicle >5 mm

Answer: (B)

Nodules are solid, elevated skin lesions that are larger than a small papule—typically >5 mm in diameter—and often extend into the deeper layers of the skin. The option describing a solid, raised lesion larger than 5 mm fits this pattern, labeling it as a papular growth over that size. While “papule” usually implies a smaller elevation, when the size exceeds 5 mm it aligns with what clinicians call a nodule because it is a solid, raised lesion of notable size. The other descriptions point to a plaque (plateau-like, usually >1 cm, flat-topped), a pustule (pus-filled), and a vesicle (fluid-filled), none of which define a nodule.