Extensor Indicis Tendinitis
Overview
Extensor indicis tendinitis is an overuse injury affecting the extensor indicis proprius (EIP) tendon, which extends the index finger 1. It typically results from repetitive forceful extension or deviation of the index finger, often seen in athletes or individuals with specific occupational demands 1.Diagnosis
Pain and tenderness localized over the distal third of the radius and the dorsal aspect of the metacarpophalangeal (MCP) joint of the index finger 1.
Pain exacerbated by resisted extension of the index finger 1.
Pain may also occur with passive flexion of the index finger 1.
Imaging such as ultrasound or MRI may reveal tendon thickening or inflammation, but diagnosis is primarily clinical 1.Management
First-line:
* Activity modification to avoid aggravating movements 1.
* Rest and ice application 1.
* Nonsteroidal anti-inflammatory drugs (NSAIDs) for pain and inflammation 1.
Adjunctive:
* Stretching and strengthening exercises for the EIP tendon and surrounding muscles 1.
* Splinting or bracing to immobilize the index finger 1.
* Physical therapy referral for guided rehabilitation 1.
* Corticosteroid injections may be considered for persistent symptoms 1.Key Recommendations
Activity modification to avoid repetitive forceful extension or deviation of the index finger is a primary management strategy 1. (Evidence: Expert opinion)
Nonsteroidal anti-inflammatory drugs (NSAIDs) can be used to manage pain and inflammation associated with extensor indicis tendinitis 1. (Evidence: Expert opinion)
Resisted extension of the index finger is a key provocative test for diagnosis 1. (Evidence: Expert opinion)References
1 Martin RL, Cibulka MT, Bolgla LA, Koc TA, Loudon JK, Manske RC et al.. Hamstring Strain Injury in Athletes. The Journal of orthopaedic and sports physical therapy 2022. link