# Unusual Duplication of Flexor Tendons in the Middle Finger Leading to Trigger Finger: A Case Report and Comprehensive Review

## TL;DR

A rare case of duplicated flexor tendon in the middle finger caused trigger finger symptoms, requiring surgical intervention and highlighting the need for further research.

## Contribution

The paper reports a previously unrecorded anatomical anomaly of duplicated FDP tendon in the context of trigger finger.

## Key findings

- Surgical exploration revealed a duplicated flexor digitorum profundus (FDP) tendon in a patient with trigger finger symptoms.
- Conservative treatment failed, necessitating surgical release of the A1 pulley and excision.
- The case emphasizes the importance of anatomical assessment in diagnosing rare tendon variations.

## Abstract

Duplication of the flexor digitorum profundus (FDP) tendon is an extremely uncommon anatomical anomaly found within the flexor digitorum superficialis (FDS) muscle, with minimal documentation in the current literature. We present the case of a 45-year-old female manual laborer who exhibited symptoms suggestive of trigger finger in her right middle finger. Surgical exploration uncovered a duplicated FDP tendon, a previously unreported anatomical anomaly in this context. Despite attempting conservative treatment initially, surgical intervention involving release of the A1 pulley, excision of the A1 pulley, and identification of the duplicated tendon was performed. The unusual nature of this anatomical variation highlights the need for additional research into its clinical significance and treatment options. This case highlights the significance of conducting comprehensive anatomical assessments to diagnose and treat uncommon variations within the FDS muscle. It underscores the continued need for collaborative research to enhance treatment approaches, especially in instances where trigger finger symptoms are present.