PIMP in talar OCD lesions describes which shape?

• A. Deep Cup-shaped
• B. Wafer-shaped
• C. Dome-shaped
• D. Flat

Answer: (A)

Understanding how talar osteochondral defects are described helps you visualize what the imaging shows. PIMP denotes a pattern where the lesion appears as a deep, cup-shaped cavity in the talar dome. This is a concave, contained crater in the subchondral bone, often with the articular cartilage overlying the area still recognizable but sitting above a substantial void beneath.

This shape stands in contrast to other morphologies: a wafer-shaped lesion is thin and plate-like, a dome-shaped lesion is more spherical or raised, and a flat lesion lacks notable depth. The deep cup-shaped appearance is the hallmark of the PIMP description, indicating a pronounced concavity that guides considerations for management and prognosis.