# Distal Intersection Tenosynovitis: Surgical Insights From Five Cases

## TL;DR

This paper presents surgical insights into a rare condition called distal intersection tenosynovitis based on five cases, suggesting wrist joint issues may contribute to its occurrence.

## Contribution

The study provides new surgical observations on the physiopathology of distal intersection tenosynovitis, highlighting potential roles of wrist joint disorders.

## Key findings

- Wrist joint issues were linked to DIT in three of the five cases.
- Tendon lesions were found in either the extensor carpi radialis brevis or extensor pollicis longus.
- Different tendon lesions suggest distinct pathological mechanisms are involved.

## Abstract

Background: Distal intersection tenosynovitis (DIT) is a rare and recently described condition that affects the extensor pollicis longus (EPL), extensor carpi radialis brevis (ECRB), and longus (ECRL). Based on surgical observations, this study aimed to provide new insights into its physiopathology. Methods: This was a retrospective study of all patients who underwent surgery for DIT at our institution from 2015 to 2024. Five patients were included in the study. Results: Wrist joint issues clearly explained the occurrence of DIT in three cases. Tendon lesions were observed either on the extensor carpi radialis brevis or extensor pollicis longus. Conclusions: These additional data complement the existing literature, which primarily focuses on the anatomical mechanisms of DIT without fully explaining its causes. Our observations suggest that wrist joint or bone disorders may play a significant role in its occurrence. Lesions in different tendons suggest the involvement of distinct pathological mechanisms.