Utility of ultrasonography in hair-thread tourniquet syndrome

Pediatr Dermatol. 2018 Mar;35(2):e138-e139. doi: 10.1111/pde.13400. Epub 2018 Jan 16.


A 2-year-old girl presented with a 2-month history of an erythematous, indurated plaque with well-defined borders on the third toe of the right foot. Bedside high-resolution ultrasonography demonstrated a thickened epidermis overlying a hyperechoic focus within the dermis. Her clinical and sonographic presentation was in keeping with a foreign body causing hair-thread tourniquet syndrome. The foreign body was surgically extirpated without neurovascular sequelae. Ultrasonography expedited accurate diagnosis and is a promising adjunct to clinical evaluation for radiolucent foreign bodies.

Keywords: diagnostic imaging; hair; hair-thread tourniquet syndrome; pseudoainhum; ultrasonography.

Publication types

  • Case Reports

MeSH terms

  • Ainhum / etiology*
  • Child, Preschool
  • Constriction, Pathologic / etiology*
  • Female
  • Foreign Bodies / diagnostic imaging*
  • Foreign Bodies / surgery
  • Humans
  • Point-of-Care Testing
  • Toes / injuries
  • Toes / surgery
  • Ultrasonography / methods*

Supplementary concepts

  • Pseudoainhum