Image Challenge – November 12th

Reference here. Steinberg, David R. (2021). Boutonniere Deformity. Merck Manual Professional Version. Link:

Question: What is the name of the physical exam finding below on the patient’s ring finger? What is an example of a cause of this?

Answer: Boutonnière Deformity! This results in flexion of the proximal interphalangeal (PIP) joint with hyperextension of the distal interphalangeal (DIP) joint and can result from tendon laceration, dislocation, fracture, osteoarthritis, rheumatoid arthritis.

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