NBCE Practice Test 2025 – Complete Exam Prep Guide

The correct choice identifies a condition where there is a flexion deformity at the proximal interphalangeal joint of the toe, commonly referred to as a hammertoe. This condition is characterized by an abnormal bend in the toe, often resembling a hammer, hence the name "hammertoe." The proximal interphalangeal joint is flexed while the distal joint may remain extended or can also be flexed, contributing to the distinctive appearance.

In contrast, a claw toe involves a similar but more complex flexion at both the proximal interphalangeal joint and the metatarsophalangeal joint, leading to an overall curled shape of the toe. The piano key sign typically refers to a specific examination technique used to assess the stability of the acromioclavicular joint, and is not related to toe deformities. The boutonniere deformity is a condition affecting the fingers, characterized by flexion of the proximal interphalangeal joint and hyperextension of the distal interphalangeal joint, which is also not applicable to the toe joint discussed in this question.