Differential Diagnosis for Left Wrist Extensor Tendon Pain near Base of Thumb with Golfing

• Single most likely diagnosis:
  • De Quervain's Tenosynovitis: This condition is characterized by inflammation of the tendons on the thumb side of the wrist, which can be exacerbated by activities like golfing that involve repetitive wrist motion. The location of the pain near the base of the thumb and the association with a specific activity like golfing make this diagnosis highly plausible.
• Other Likely diagnoses:
  • Intersection Syndrome: This condition involves inflammation of the tendons that cross over each other on the back of the forearm, near the wrist. It can cause pain and swelling in this area, especially with activities that involve gripping or twisting, such as golfing.
  • Wrist Extensor Tendinopathy: Overuse or repetitive strain from golfing can lead to inflammation and pain in the extensor tendons of the wrist, which could be felt near the base of the thumb due to the anatomical proximity.
• Do Not Miss diagnoses:
  • Gout or Pseudogout: Although less common, these conditions can cause sudden, severe pain and swelling in the wrist or thumb area. Missing these diagnoses could lead to inappropriate treatment and potential long-term damage.
  • Infectious Tenosynovitis: Bacterial infection of the tendon sheath can present with pain, swelling, and decreased mobility. This is a medical emergency requiring prompt antibiotic treatment.
• Rare diagnoses:
  • Ganglion Cyst: A lump or mass that can develop near joints or tendons, causing pain if it presses on nearby nerves. While not typically associated with activity-related pain, it could be a consideration if other diagnoses are ruled out.
  • Kienbock's Disease: A rare condition involving the collapse of the lunate bone in the wrist, which could cause chronic wrist pain. However, it is less likely to be directly related to golfing activity without a history of trauma.