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Wk 4, Case 1 - Review

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These are sagittal images on a water polo pair

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38 year old who presented with acute injury to the distal

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interphalangeal joint of his middle finger.

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We can see that there is a full thickness retracted tear of the

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terminal extensor tendon at its insertion into the

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dorsal plate of the distal feeling of this finger fluid

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signal intensity allow us to outline the tendon

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gap between the retracted tendon stump and the inspected insertion

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site at the dorsal plate.

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This is in the spectrum of mallet finger with slight,

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uh, flexion deformity at the d I P joint that goes along with

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this type of um, lesion.

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It's important to note that the bone is completely intact.

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We don't see a mallet fracture. The dorsal plate is completely normal,

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cortex is preserved and there is no bone marrow edema.

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So in short,

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soft tissue injury with tear of the extensor tendon at

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the distal interphalangeal joint on this water polo player.

Report

Patient History
38-year-old male complaining of 3rd digit pain status post water polo injury in June 2017.

Findings

LIGAMENTS: Normal. No injury to the pulley mechanisms.

OSSEOUS: No evidence of avulsion fractures with special attention to the dorsal aspect of the 3rd distal phalanx.

TENDONS: Complete tear or rupture of the terminal extensor tendon located about 6-7 mm from its insertion at the 3rd distal interphalangeal (DIP) joint capsule associated with diffuse soft tissue swelling dorsally.

The flexor digitorum profundus and superficialis tendons are intact.

Impressions
1.Soft mallet injury of the right 3rd digit with complete rupture of terminal extensor tendon 6-7 mm proximally to its insertion at the DIP joint capsule.

Case Discussion

Faculty

Stephen J Pomeranz, MD

Chief Medical Officer, ProScan Imaging. Founder, MRI Online

ProScan Imaging

Jenny T Bencardino, MD

Vice-Chair, Academic Affairs Department of Radiology

Montefiore Radiology

Todd D. Greenberg, MD

Radiologist

ProScan

Tags

Musculoskeletal (MSK)

MRI

Hand & Wrist