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Wk 3, Case 2 - Review

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This is a 62 year old man who has history of pain at the base of thumb

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articulation, coronal, ster, and coronal.

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T one weighted images demonstrate end stage osteoarthritis at the first

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carpal metacarpal joint with marked loss of articular cartilage

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and near vulnerable contact of the subcontract plates across the articulation.

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Very important to assess the integrity of the ligaments at

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the first C M C joint where we see advanced osteoarthritis.

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So we have the anterior oblique ligament also turn the big ligament,

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which in this patient, um, we, uh,

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have big osteophytes at the attachment of the anterior oblique ligament

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that go along with the, um,

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setting of osteoarthritis and first carpal metacarpal instability.

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In assessing the ligament,

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we go to the palmar surface and we see that there is discontinuity

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of the fibers at the insertion into the trapezium. Uh,

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so this patient has a chronic tear of the big ligament of the

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anterior of ligament, assessing the delta ligament.

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We see also osteophytes at the base of the first metacarpal in that location,

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some reactive antipathy at the insertion of the delta

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ligament,

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and marked thickening of the fibers contributing to the presence of

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radial subluxation of the first metacarpal base on the trapes

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in this patient with end stage osteoarthritis.

Report

Patient History
62-year-old female with history of right ulnar-sided cyst, status post multiple drainage procedures.

Findings

ALIGNMENT:

Ulnar Variance: Neutral ulnar variance position.

Distal Radioulnar Joint: Normal.

Carpal Instability: None.

ARTICULATIONS:

Thumb Carpometacarpal Joint: Dorsoradial subluxation of the 1st carpometacarpal joint associated with volar, beak-like osteophytes involving the 1st metacarpal base and ulnar side of the trapezium. Laxity and discontinuity of the anterior oblique (“beak”) ligament (AOL) which is discontinuous and retracted distally. Laxity of the radial side deltoid ligament. Generalized chondromalacia with subchondral arthropathic cysts and mild capsulitis.

Scaphotrapeziotrapezoidal Joint: Mild osteoarthritis.

Pisiform-Triquetral Joint: Normal.

Radiocarpal Joint: Normal.

Distal Radioulnar Joint: Normal.

Carpal Effusion: Nominal.

Distal Radioulnar Joint Effusion: Mild fluid distention.

INTRINSIC LIGAMENTS:

Scapholunate Ligament: Intact.

Lunotriquetral Ligament: Intact.

Triangular Fibrocartilage: Complex chronic tear of the TFCC disc proper. Associated chondromalacia and subchondral cyst formation of the lunate and triquetrum. Diffuse edema and inconspicuous signal of the triangular ligament (ligamentum subcruentum) involving its foveal and styloid attachments as well as the meniscus homologous portion.

Lunate Facet: Diffuse chondromalacia.

Extensor Compartment: No tears or tendinopathy.

Flexor Compartment: No tears or tendinopathy.

Carpal Tunnel: No space-occupying lesions. Normal flexor retinaculum.

Median Nerve: Mild increased diameter with normal signal.

Flexor Retinaculum: No thickening or scarring

Flexor Tendons: No tears or tendinopathy.

Guyon's Canal: Normal.

OTHER FINDINGS:

Vessels: Normal neurovascular bundle.

Impressions
1.Suggestion of ulnar impaction syndrome resulting in complex chronic tear of the TFCC disc, associated lunotriquetral chondromalacia and complex sprain of the triangular ligament and meniscus homologous (TFCC Palmer class IIA).
2.Severe osteoarthrosis of the thumb CMC joint with dorsoradial subluxation, injury to the AOL and laxity of the radial side deltoid ligament.

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