The Extensor Indicis Proprius Transposition for the Ulnar Collateral Ligament Stabilization in Thumb Hypoplasia Grades II-IIIa

Dzintars Ozols (Coresponding Author), Rūdolfs Laucis, Reinis Osins, Marisa Maija Berezovska, Linda Kalniņa, Aleksandrs Mikitins, Aigars Pētersons

Research output: Contribution to journalArticlepeer-review


Congenital upper extremity deformities are rare, the reported incidence is from 0.15% to 0.2%. The thumb is very important for a hand's functionality, as it provides up to 50% of its total performance. Proper pinch grip formation at the age of 12 to 16 months is part of normal development; however, no functional development can affect a child's psychoemotional development. Well-described techniques such as third or fourth superficial flexor transposition can be found in the literature. There is a paucity of studies on using the extensor indicis proprius (EIP) transposition for stabilization of the ulnar collateral ligament for the first metacarpophalangeal joint (MCPJ). Techniques for the usage of EIP tendon for the reconstruction of absent extensor pollicis longus tendon are more commonly practiced as they create abduction and extension for the thumb hypoplasia grade II-IIIa. We performed EIP transposition with subperiosteally fixation for the ulnar collateral ligament stabilization for thumb hypoplasia patients with a mean age of 38 months (11 to 128) and grade II (n=9), grade IIIa (n=4), and grade IIIb (n=1). Long-term follow-up (2 to 10 y) for the esthetical and functional study was performed. Patients and parents are satisfied with functional and esthetic outcomes. We believe that the EIP tendon transposition can be an alternative method for thumb hypoplasia patients grade II-IIIa reconstruction.
Original languageEnglish
Pages (from-to)73-78
Number of pages6
JournalTechniques in Hand and Upper Extremity Surgery
Issue number2
Publication statusPublished - 4 Jun 2023


  • congenital hand deformity
  • extensor indicis proprius transposition
  • thumb hypoplasia
  • ulnar collateral ligament reconstruction

Field of Science*

  • 3.2 Clinical medicine

Publication Type*

  • 1.1. Scientific article indexed in Web of Science and/or Scopus database


Dive into the research topics of 'The Extensor Indicis Proprius Transposition for the Ulnar Collateral Ligament Stabilization in Thumb Hypoplasia Grades II-IIIa'. Together they form a unique fingerprint.

Cite this