Dark discoloration of the dorsal skin of the finger joints. A poor prognostic sign in rheumatoid arthritis.
D001168:Arthritis; D001172:Arthritis, Rheumatoid; D005384:Finger Joint; D005385:Fingers; D006801:Humans; D010859:Pigmentation Disorders
ARTHRITIS, RHEUMATOID; FINGERS; PIGMENTATION DISORDERS