Journal of Ultrasound

, Volume 18, Issue 1, pp 79–82 | Cite as

Sonographic findings of extensor digiti minimi triggering caused by thickened extensor retinaculum

  • Jyoti PanwarEmail author
  • Binu P. Thomas
  • Raveendran Sreekanth
Case Report


Trigger finger is a common well recognized condition and involves the flexor tendons at the A1 pulley in the palm. Triggering of the extensor tendons is a very rare clinical entity. We report a rare case of extensor triggering of little finger caused by constriction of the extensor digiti minimi by a markedly thickened extensor retinaculum (ER) at the wrist, well delineated dynamically by real-time high-resolution ultrasound. The patient underwent release of thickened ER and was asymptomatic immediately.


Extensor Tendon Trigger Retinaculum Ultrasound 


Il dito a scatto è una condizione frequente, ben riconosciuta, che coinvolge i tendini flessori a livello della puleggia A1. A livello dei tendini estensori è un’entit□ clinica molto rara. Riportiamo un raro caso di dito a scatto dell’estensore del mignolo causato da un marcato ispessimento del retinacolo degli estensori (ER) a livello del polso, ben evidenziato con ecografia dinamicamente ad alta risoluzione. Il paziente è stato sottoposto a intervento con resezione dell’ER ispessito con conseguente, completa, risoluzione della patologia.



We thank Dr. J. Roland Manoj for image assistance.

Conflict of interest

Authors declare that they have no conflict of interest.

Human and animal studies

The study described in this article does not contain studies with human or animal subjects performed by any of the authors.

Supplementary material

Supplementary material 1 (MPG 3946 kb)

Supplementary material 2 (MPG 3042 kb)


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Copyright information

© Società Italiana di Ultrasonologia in Medicina e Biologia (SIUMB) 2014

Authors and Affiliations

  • Jyoti Panwar
    • 1
    Email author
  • Binu P. Thomas
    • 2
  • Raveendran Sreekanth
    • 2
  1. 1.Department of RadiologyChristian Medical College and HospitalVelloreIndia
  2. 2.Department of Hand and Leprosy Reconstructive Surgery (HLRS)Christian Medical College and HospitalVelloreIndia

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