Instability of the extensor digitorum tendons in Jaccoud arthropathy assessed by semi-dynamic MRI of the metacarpophalangeal joints

Finger extensor tendon dislocation at the metacarpophalangeal joint is caused by various etiologies, such as trauma, congenital anomaly, or rheumatoid arthritis. When the dislocation occurs with no etiology, this is called spontaneous dislocation. Although spontaneous extensor tendon dislocation in one, two or three fingers has been described, to our knowledge, simultaneous dislocation in four fingers has not been reported. In this paper, we report a spontaneous ulnar dislocation of all the extensor tendons in the index, long, ring, and small fingers. Repair of the radial sagittal bands of the extensor digitorum communis of the middle and ring fingers reduced dislocation of all the extensor tendons in four fingers.

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Evidence for the Presence of Synovial Sheaths Surrounding the Extensor Tendons at the Metacarpophalangeal Joints

10.20944/preprints202109.0122.v1 ◽

2021 ◽

Author(s):

Yousra Dakkak ◽

Friso Jansen ◽

Lambertus Wisse ◽

Monique Reijnierse ◽

Annette van der Helm-van Mil ◽

...

Keyword(s):

Contrast Enhancement ◽

Synovial Tissue ◽

Microscopy Study ◽

Extensor Digitorum ◽

Synovial Lining ◽

Metacarpophalangeal Joints ◽

Extensor Tendons ◽

Increased Risk ◽

Anatomic Variants ◽

Fibroblast Like Synoviocytes

Background. MRI-detected inflammation around the metacarpophalangeal (MCP-)joints is prevalent in RA and poses a markedly increased risk of RA-development when present in arthralgia patients. Such inflammation is called ‘peritendinitis’, since anatomy literature reports no presence of a tenosynovial sheath at these tendons. However, the presence or absence of a synovial sheath at these extensor tendons has never been studied. Methods. A macroscopy and microscopy study of extensor-tendons at the MCP-joints of two embalmed human hands was performed. Routine histology was performed with Haematoxylin-Eosin staining. Results. We found evidence for the presence of synovial lining around extensor-tendons at MCP-joints. A delimited space surrounding the extensor digitorum tendon was observed, which was lined with an epithelium representing fibroblast-like synoviocytes. Conclusion. Contrast-enhancement around extensor tendons at MCP joints observed on MRI in RA represents tenosynovitis and thus inflammation of synovial tissue. Further studies with larger numbers of specimen are warranted to study anatomic variants. In addition, the molecular composition of the tenosynovium remains to be characterized.

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Radiographic Prevalence of Osteochondrosis in Yearling Feral Horses

Veterinary and Comparative Orthopaedics and Traumatology ◽

10.1055/s-0038-1632481 ◽

1999 ◽

Vol 12 (03) ◽

pp. 151-155 ◽

Cited By ~ 19

Author(s):

L. W. Valentino ◽

E. M. Gaughan ◽

D. R. Biller ◽

R. H. Raub ◽

J. D. Lillich

Keyword(s):

Subchondral Bone ◽

Management Practices ◽

Articular Surface ◽

Radiographic Images ◽

Feral Horses ◽

Metacarpophalangeal Joints ◽

Genetic Base ◽

Domestic Horses ◽

The Difference ◽

Metatarsophalangeal Joints

The purpose of the study is to document the prevalence of articular surface osteochondrosis lesions in feral horses. Eighty yearling feral horses were used. Radiographic images of the left stifle, both tarsocrural, metatarsophalangeal, metacarpophalangeal joints were taken. Radiographs were examined for the presence of osteochondral fragmentation and abnormal outline of subchondral bone suggestive of osteochondrosis. The prevalence of each lesion was calculated for each joint as well as for overall prevalence within the group, the latter being 6.25%. Typical osteochondrosis lesions were found within the tarsocrural and metatarsophalangeal joints. Based on the difference in prevalence of osteochondrosis between feral and certain domestic horses, management practices and perhaps genetic base may have a greater influence on the development of the disease in horses than trauma alone.

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Effects of early exercise on metacarpophalangeal joints in horses

Journal of the American Veterinary Medical Association ◽

10.2460/javma.236.8.891 ◽

2010 ◽

Vol 236 (8) ◽

pp. 891-891

Author(s):

Chris E. Kawcak ◽

C. Wayne McIlwraith ◽

Elwyn C. Firth

Keyword(s):

Early Exercise ◽

Metacarpophalangeal Joints

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A Novel Reconstruction Approach Combining Global and Local Low-rank Constraints for Undersampled Dynamic MRI

Current Medical Imaging Formerly Current Medical Imaging Reviews ◽

10.2174/1573405613666170407154317 ◽

2018 ◽

Vol 14 (5) ◽

pp. 732-743

Author(s):

Changfeng Xi ◽

Jinxu Tao ◽

Bensheng Qiu ◽

Zhongfu Ye ◽

Jinzhang Xu

Keyword(s):

Dynamic Mri ◽

Low Rank ◽

Rank Constraints ◽

Global And Local

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AB1294 Psoriatic arthritis - a follow-up study applying dynamic MRI, conventional MRI and clinical measures:

Annals of the Rheumatic Diseases ◽

10.1136/annrheumdis-2012-eular.1290 ◽

2013 ◽

Vol 71 (Suppl 3) ◽

pp. 711.14-711

Author(s):

R.P. Poggenborg ◽

P. Bøyesen ◽

C. Wiell ◽

S.J. Pedersen ◽

I.J. Sørensen ◽

...

Keyword(s):

Psoriatic Arthritis ◽

Dynamic Mri ◽

Follow Up Study ◽

Conventional Mri ◽

Clinical Measures

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Clinical outcomes after mini-hook plate fixation for small avulsion fractures around the interphalangeal or metacarpophalangeal joints of the hand

Journal of Orthopaedic Surgery and Research ◽

10.1186/s13018-021-02339-z ◽

2021 ◽

Vol 16 (1) ◽

Author(s):

Jung Il Lee ◽

Ki-Chul Park ◽

Hyun Soo So ◽

Duk Hee Lee

Keyword(s):

Clinical Outcomes ◽

Plate Fixation ◽

Hook Plate ◽

Joint Stability ◽

Avulsion Fractures ◽

Metacarpophalangeal Joints ◽

Early Results ◽

Mallet Fracture ◽

Osseous Union ◽

Central Slip

Abstract Background Mini-hook plate has been described for the treatment of various small avulsion fragments in the hand. This retrospective study aimed to evaluate clinical outcomes after mini-hook plate fixation in patients with an avulsion fracture around the interphalangeal or metacarpophalangeal joints of the hand. Methods Nineteen patients with avulsion fractures around the interphalangeal or metacarpophalangeal joints of the hand were included in this study. Seven patients had a mallet fracture, and 12 patients had other phalangeal avulsion fractures including central slip, collateral ligament, volar plate, and flexor avulsion fractures. The osseous union and functional outcomes, including finger joint motion, joint stability, pinching strength, and the disabilities of the arm, shoulder, and hand score, were evaluated. Results The mean duration of follow-up was 33.8 months. All patients in mallet and other phalangeal avulsion fractures achieved osseous union between the avulsion fragment and phalangeal bone, and there was no joint subluxation. There were no significant differences in the disabilities of the arm, shoulder, and hand scores. However, the patients with mallet fracture have lower mean percentage values of the total active range of motion and pinching strength than other phalangeal avulsion fractures. We abandoned this procedure in mallet fractures because the early results after mini-hook plate fixation in mallet fractures appeared unfavorable. Conclusion These results suggest that the mini-hook plate fixation can provide sufficient stability and good clinical outcomes in those with phalangeal avulsion fractures. However, the outcomes for mallet fractures were not as good as those for other phalangeal avulsion fractures.

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