Bilateral Supernumerary extensor carpi radialis brevis tendons mimicking de quervain's tenosynovitis: A rare cause of radial wrist pain.

We present a rare case of bilateral supernumerary extensor carpi radialis brevis (ECRB) tendons in a 35-year-old male with chronic radial wrist pain. MRI demonstrated 3 tendons in the second extensor compartment of both wrists, mimicking De Quervain's tenosynovitis. Anatomical variations such as this may contribute to symptoms and must be considered in differential diagnosis. Awareness of these findings is essential for accurate diagnosis and appropriate treatment.