Close
Thickening with abnormal intrasubstance increased fluid signal of the first
dorsal (extensor) compartment tendons of the wrist (abductor pollicis longus and extensor pollicis
brevis).
There is increased fluid within the first dorsal (extensor) compartment tendon sheath.
Degenerative changes such as joint space narrowing, cartilage thinning, and fraying
and subchondral cystic changes are seen along with the first CMC joint.