Painless effusions in joints in congenital syphilis are called
Clutton's joint - painless synovitis occurring at puberty, is a late manifestation of congenital syphilis, If most commonly affects the knee and elbow, mostly bilateraly
a. Charcot's joint - occures in Tabes dorsalis, syringomyelia diabetes, amyloidosis, leprosy, intra-articular glucocorticoid infection.
b. Commonest site in diabetes is - tarsals and metatarsals.
c. Barton's fractures - the true Barton's injury is a volar fracture associated with subluxation of the corpus. The fracture line runs obliquely across the volar lip of the radius into the wrist joint, the distal fragment is displaced anteriorly.