Joint least commonly involved in RA according to 1987 modified ara criteria is?
1987 revised criterion for RA patient has RA if four out of seven are present,1-4 must be present for at least 6 weeks.
a. Morning stiffness >1 hour
b. 3out of 14 joints involved right or left -PIP/MCP/WRIST/ELBOW/KNEE/ANKLE/MTP
i. At least one area swollen out of wrist/MCP/PIP
ii. Symmetrical arthritis
iii. Rheumatoid nodule (pathognomic)
iv. Rheumatoid factor (positive in 80%)
v. Radiographic changes on wrist and hand x rays