Which description is associated with a well-defined abnormality with a uniform border?

• A. Punched-out
• B. Corticated (uniform)
• C. Internal rim
• D. Sclerotic

Answer: (B)

A well-defined abnormality with a uniform border points to a corticated border. This means there is a thin, smooth, sclerotic rim around the lesion, showing the bone has formed a cortex as the lesion grew slowly. That cortical reaction indicates a benign, slow-growing process rather than an aggressive one. The corticated, uniform border is the hallmark here.

Punched-out describes sharp margins without a surrounding sclerosis rim, typical of more aggressive processes like certain lytic lesions. An internal rim refers to a ring seen inside the lesion rather than around its outer edge. Sclerotic describes the density of the border itself rather than its uniform, corticated appearance.