• wrist tendon entrapment syndrome in which gliding of the abductor pollicis longus and the extensor pollicis brevis tendons is restricted within the first dorsal compartment.
• Tenosynovitis - inflammation of synovial tendon sheath lining

<aside> 💡 inflammation not considered to be a key component

</aside>

• Anatomy

Demographics: women, 30-50yo, maybe with other systemic inflamm (RA)

Pathophysiology

• repetitive strain and tissue trauma→ degenerative thickening of extensor retinaculum and extensor tendons→ space narrows in fibro-osseous canal → impaired tendon gliding of abductor pollicis longus and extensor pollicis brevis → discomfort and funtional impairment

Risk factors

• Repetitive activities involving radioulnar deviation, such as with certain
  • sports (for example, cross-country skiing, golfing)
  • household chores or caregiving (for example, lifting an infant/child or pet)
  • occupations (for example, hammering)
  • Individuals who text a lot
• Pregnancy, postpartum period, and lactation
• Inflammatory conditions such as rheumatoid arthritis

Clinical Features

• Pain (with or without swelling) of the radial styloid
• Pain may radiate to thumb or elbow, exacerbated by movement/grasping objects.