Skeletal Radiology

, Volume 47, Issue 5, pp 747–750 | Cite as

Hallux saltans due to stenosing tenosynovitis of flexor hallucis longus: dynamic sonography and arthroscopic findings

  • Edgar Leonardo Martinez-Salazar
  • Joao R. T. Vicentini
  • Anne H. Johnson
  • Martin Torriani
Case Report


Triggering of the toes is rare, with isolated cases reported in the literature involving predominantly the flexor hallucis longus (FHL) tendon, a condition known as “hallux saltans” (HS). We report the dynamic sonographic findings of a 42-year-old female with a 2-month history of ankle pain and triggering of right hallux, consistent with HS. Sonography demonstrated tenosynovitis and focal thickening of FHL at the level of hindfoot, with a fibrous band adjacent to the tendon. Dynamic ultrasound showed triggering and snapping of FHL tendon during hallux flexion and extension, respectively. We present comprehensive documentation of this rare entity, including sonographic still images and cine clips, as well as correlation with arthroscopic surgical findings.


Hallux saltans Trigger toe Sonography Stenosing Tenosynovitis 


Compliance with ethical standards

Conflict of interest

No conflict of interest


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Copyright information

© ISS 2017

Authors and Affiliations

  • Edgar Leonardo Martinez-Salazar
    • 1
  • Joao R. T. Vicentini
    • 1
  • Anne H. Johnson
    • 2
  • Martin Torriani
    • 1
  1. 1.Division of Musculoskeletal Imaging and Intervention, Department of RadiologyMassachusetts General Hospital and Harvard Medical SchoolBostonUSA
  2. 2.Department of OrthopaedicsMassachusetts General Hospital and Harvard Medical SchoolBostonUSA

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