Locking of the Metacarpophalangeal Joint as a Result of the Shape of the Metacarpal Head in Achondroplasia

A 21 year-old woman with achondroplasia exhibited locking of the metacarpophalangeal joint of the right index finger which required surgery to release the joint. Locking was confirmed to be due to entrapment of the fan-like part of the radial collateral ligament on a metacarpal head prominence arising from epiphysial thickening.

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Anatomical Study of the First Dorsal Interosseous Tendon for its Use as a Plasty of the Radial Collateral Ligament of the Index Metacarpophalangeal Joint

Revista Iberoamericana de Cirugía de la Mano ◽

10.1055/s-0037-1602748 ◽

2017 ◽

Vol 45 (01) ◽

pp. 024-027

Author(s):

Angel Ferreres ◽

Montse Del Valle ◽

Alfonso Rodríguez

Keyword(s):

Anatomical Study ◽

Metacarpophalangeal Joint ◽

Distal Portion ◽

First Dorsal Interosseous ◽

Collateral Ligament ◽

Radial Collateral Ligament ◽

Dorsal Portion ◽

First Dorsal Interosseous Muscle ◽

The Difference ◽

The Right

Purpose The authors present an anatomical study to justify the use of the distal portion of the tendon of the first dorsal interosseous muscle (FDIM) for the repair of the chronic rupture of the radial collateral ligament (RCL) of the metacarpophalangeal joint of the index finger. Methods Ten hands of cryopreserved specimens were used and thawed at room temperature for dissection with optical magnification. Five were hands of women, and their ages ranged from 46–96 years (mean: 72.8), and 8 corresponded to the right hand. Results The length of the tendon of the FDIM ranged from 20 to 40 mm (mean: 25 mm). The length of the RCL ranged from 14 to 24 mm (mean: 18.2 mm). The difference between both structures of the same specimen averaged 6.8 mm (2–16 mm). Therefore, the dorsal portion of the tendon of the FIDM is always at least 2 mm longer than the length of the RCL. Conclusions In conclusion, this is a simple technique that allows the surgeon to perform a plasty of the RCL without sacrificing another tendon in the absence of the palmaris longus, which is more commonly used for this purpose. The maintenance of its distal insertion may also help in the revascularization of the repaired area.

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Entrapment of the index finger radial collateral ligament in the metacarpophalangeal joint: A case report

Ultrasound ◽

10.1177/1742271x211055844 ◽

2021 ◽

pp. 1742271X2110558

Author(s):

Eric X Jiang ◽

Michael A Korn ◽

Elizabeth A King ◽

Marnix van Holsbeeck

Keyword(s):

Case Report ◽

Index Finger ◽

Metacarpophalangeal Joint ◽

Injury Pattern ◽

Acute Injury ◽

Ligament Injury ◽

Collateral Ligament ◽

Radial Collateral Ligament ◽

Superb Microvascular Imaging ◽

Microvascular Imaging

Introduction Digital collateral ligament injuries are common hand injuries that can cause significant pain and functional impairment. Ultrasonography can be useful in the evaluation of these ligamentous injuries, as it is both cost-effective and allows for easy, dynamic evaluation during imaging. Case report We report a rare sonographic finding of an index finger radial collateral ligament injury that was found to have a flap of the ligament entrapped within the metacarpophalangeal joint, which to our knowledge has not been described previously. We correlate this finding with an intraoperative image of the entrapment of the collateral ligament. We also report on the novel application of superb microvascular imaging to aid in the diagnosis of digital collateral ligament injury. Discussion This particular injury pattern has not been reported in the literature previously and likely explains the patient’s lack of improvement with nonoperative management. Our finding is similar to a Stener lesion seen in a thumb ulnar collateral ligament injury in which the ligament is unable to heal due to entrapment. In addition, using superb microvascular imaging (SMI), we were able to visualize hyperemia to surrounding structures and the ligament itself which suggested an acute injury. Conclusion We anticipate that this case report will provide sonographers with knowledge and images of this specific injury pattern to the digital collateral ligaments.

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28-year-old woman training fencing with isolated rupture of radial collateral ligament of the metacarpophalangeal joint of the index finger

Sports Orthopaedics and Traumatology ◽

10.1016/j.orthtr.2015.06.009 ◽

2015 ◽

Vol 31 (3) ◽

pp. 228-232

Author(s):

Karolina Stępień ◽

Robert Śmigielski

Keyword(s):

Index Finger ◽

Metacarpophalangeal Joint ◽

Collateral Ligament ◽

Radial Collateral Ligament

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ROTATORY SUBLUXATION OF THE METACARPOPHALANGEAL INDEX FINGER JOINT: A CASE REPORT

Hand Surgery ◽

10.1142/s0218810413720064 ◽

2013 ◽

Vol 18 (01) ◽

pp. 103-105 ◽

Cited By ~ 1

Author(s):

Ken Teo ◽

Anthony Berger

Keyword(s):

Case Report ◽

Index Finger ◽

Extensor Tendon ◽

Metacarpophalangeal Joint ◽

Clinical Suspicion ◽

Collateral Ligament ◽

Open Injury ◽

Complete Tear ◽

Rotatory Subluxation ◽

High Level

We report a case of rotatory subluxation of the metacarpophalangeal joint (MCPJ) of the finger. A 40-year-old man sustained an open injury to his index finger following an explosive injury. Radiographs showed rotatory subluxation of the index finger MCPJ. The index finger extensor digitorium was found interposed in the MCPJ, with a complete tear of the radial collateral ligament. Treatment was by open reduction and repair of the collateral ligament and the extensor tendon. A high level of clinical suspicion is needed to diagnose this entity.

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