Ulnar impaction syndrome: MR imaging findings.

Imaeda, Toshihiko; Nakamura, Ryogo; Shionoya, Kaori; Makino, N

doi:10.1148/radiology.201.2.8888248

Cited by 128 publications

(70 citation statements)

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“…The pathological radiological features include: fraying (patient described in case 1) or tearing (patient described in case 3) of the TFCC, chondromalacia of the ulnar head, lunate or triquetral bone, instability or tear of the lunotriquetral ligament, and a late and advanced feature is osteoarthritis of the distal radio-ulnar joint and ulnocarpal joint. 1,6,11,12,13 Ulnar impaction syndrome is associated with positive ulna variance but may occur with neutral or negative variance. 1,6,8,14 Only one patient described in our series had a mildly positive ulnar variance.…”

Section: Discussionmentioning

confidence: 99%

“…In such cases, when there is a high clinical index of suspicion of ulnar impaction syndrome, further imaging including MRI should be considered for detection of occult disease. 1,6,12 Depending on the suspected pathology, other modalities including ultrasound, CT, 99Technetium bone scans, MRI, MR arthrography or conventional arthrography may be used.…”

Section: Discussionmentioning

confidence: 99%

“…MR imaging and MR arthrography may be necessary to demonstrate the integrity of the TFCC and lunotriquetral ligaments in patients with radiographic evidence of ulnar impaction syndrome. 1,6,12,13 The joint cartilage of the ulnar head and ulnar carpus is characterised by fibrillation in the early stages of ulnar impaction syndrome. Further disease progression leads to bone hyperaemia and later to sclerosis.…”

Section: Discussionmentioning

confidence: 99%

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Ulnar impaction syndrome: A case series and imaging approach

Liebenberg¹,

Velleman²,

Suleman³

2016

SA orthop. j.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Ulnar impaction syndrome: A case series and imaging approach

Liebenberg¹,

Velleman²,

Suleman³

2016

SA orthop. j.

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“…Edema is seen in the lunate, most commonly followed by edema within the radial portion of the triquetrum. According to one study, only 10 % of patients demonstrated edema within the ulnar head [ 46 ]. Late MRI shows decreased signal intensity on T1-and T2-W images, suggesting subchondral sclerosis; radiographs show sclerosis of the involved osseous structures and subchondral cystic change.…”

Section: Imagingmentioning

confidence: 99%

The Hand and Wrist: Acquired Disorders

Pai

Smith

Strouse

2014

Pediatric Orthopedic Imaging

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This chapter discusses the clinical and imaging characteristics of acquired lesions that are encountered in the pediatric hand and wrist. The fi rst section addresses three categories of fractures: radial and ulnar fractures, carpal bone fractures, and hand fractures. The second section focuses on overuse injuries including Kienböck osteonecrosis, gymnast wrist, and ulnocarpal impaction. Disorders involving tendons and ligaments are then discussed, addressing tendon pathology in the extensor compartments, trigger thumb, carpal instability, the ulnar collateral ligament of the thumb, and the triangular fi brocartilage complex. Following this in-depth section on tendons and ligaments, imaging of neurovascular injuries and ganglion cysts is addressed. The chapter closes with a discussion of burns and frostbite.

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“…Bislang erreichte die MRT nur eine eingeschränkte Treffsicherheit in der Diagnostik der TFCC-Verletzung. Je nach Autor und Untersuchungsmodus ergaben sich erhebliche Schwankungen der Trefferquoten zwischen 40% und 95% [9,10,20]. Neue Magnetresonanztomographen mit verbesserter Hard-und Software, lassen eine höhere Trefferquote erwarten.…”

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TFCC-L�sionen

Meier

Schmitt²,

Christopoulos³

et al. 2003

Der Unfallchirurg

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In a blinded study from January to July 2000, 125 patients suffering from specific complaints of the wrist were examined with direct MR arthrography prospectively. Within 24 hours an arthroscopy of the wrist was performed. With the MR arthrography in 70 patients or 56% of all patients injury of the TFCC was diagnosed. In 65 patients this could be verified arthroscopically. In the remaining 55 patients no TFCC lesion was diagnosed with the MR arthrography. However lesions were found via arthroscopy in three cases,were MRI findings expected an intact TFCC. In the remaining 52 cases the MRT could exclude a lesion of the TFCC correctly. An agreement of the MRT and arthroscopic results could be determined in 93.6% of the cases (correlation). The diagnosis of a TFCC lesion by means of MRI was correct in 94% of the cases (sensitivity), the exclusion of such lesion in 89% (specificity). Positive or negative predictive values of 91% or 93% were achieved. Since neither a specificity nor a sensitivity of 100% can be reached at the moment, the MR arthrography cannot replace the arthroscopy. However it could be a potent additional tool for wrist diagnosis if intraarticular contrast is used. It can facilitate the diagnostics and the indication for surgery at the ulnocarpal wrist and help to reduce arthroscopic interventions that are only for diagnostic purposes and without any therapeutic consequences. With improvement of the technique of magnet resonance tomography we can expect further increase of accuracy and the clinical use of the MR arthrography in the diagnostic workup at the ulnocarpal wrist.

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Ulnar impaction syndrome: MR imaging findings.

Abstract: Most ulnar impaction syndrome cases have characteristic focal signal intensity changes in the ulnar part of the lunate. The signal intensity often returns to normal after ulnar recession arthroplasty.

Cited by 128 publications

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Ulnar impaction syndrome: A case series and imaging approach

Ulnar impaction syndrome: A case series and imaging approach

The Hand and Wrist: Acquired Disorders

TFCC-L�sionen

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