S66: Injury of muscle and tendon at wrist and hand level
S66.2: Injury of extensor muscle and tendon of thumb at wrist and hand level
Tendons are made up of very firm connective tissue. Tendons attach muscles to bones. Muscles and tendons enable corresponding parts of the body to be moved.
Muscles and tendons can get injured in an accident, for example. In your case, muscles or tendons that are used to extend the thumb have been damaged.
Where exactly the problems are depends on which muscle or tendon has been damaged. The problems also depend on which part of the muscle or tendon has been damaged. When muscles or tendons in the hand are damaged, you are usually no longer able to move your hand properly. The movement is then no longer as strong as usual. The range of movement is often reduced, too. When muscles or tendons are badly damaged, they may also tear, for example. You can also have pain in the area affected.
Patient Disclaimer
The information provided on this page is for general educational purposes only. It is not intended for self-diagnosis and does not replace professional medical advice. Always consult your doctor or a qualified healthcare provider with any questions or concerns about your health.
If you see an ICD diagnosis code (e.g., on a medical report), be aware that doctors may also include additional indicators to express diagnostic certainty. Only a healthcare professional can interpret these codes accurately in the context of your individual case.
For a complete understanding of your condition and what the diagnosis means for you, please speak directly with your doctor.