Unilateral pain where ECRL and ECRB intersect with abductor pollicis longus (APL), extensor pollicis brevis (EPB) - over the dorsum of the wrist on the radial side of the dominant hand, about 5 cm proximal to wrist joint
Swelling
Crepitus may be present on active and passive wrist flexion, extension, radial, and ulnar deviation
Neurovascular evaluation should be normal, and there is usually no associated pain or restriction is proximal joints (elbow, shoulder, neck)
Easily confused with De Quervain tenosynovitis
Intersection syndrome
Distal finger
Superior mesenteric artery syndrome
Finger amputation
Toxic megacolon
Fingertip laceration
Ogilvie's syndrome
Nail avulsion