Remember the following tables and they will help remember easily for a long time.
Here is a table that helps to remember diagnostic criteria for RA easily.
|Points||Number and site of involved joints||Serological abnormality (rheumatoid factor or anti-citrullinated peptide/protein antibody)|
|1||Symptom duration at least six weeks||Elevated acute phase response ESR or CRP|
above the ULN
|2 to 10 large joints (from among shoulders, elbows, hips, knees, and ankles)|
|2||1 to 3 small joints (from among the metacarpophalangeal joints, proximal interphalangeal joints, second through fifth metatarsophalangeal joints, thumb interphalangeal joints, and wrists)||Low positive (above the upper limit of normal [ULN])|
|3||4 to 10 small joints||High positive (greater than three times the ULN)|
|5||Greater than 10 joints (including at least 1 small joint)|
In addition to those with the criteria above, which are best suited to patients with newly presenting disease, the following patients are classified as having RA:
●Patients with erosive disease typical of RA with a history compatible with prior fulfillment of the criteria above
●Patients with longstanding disease, including those whose disease is inactive (with or without treatment) who have previously fulfilled the criteria above based upon retrospectively available data.
Reference: UpToDate. Diagnosis and differential diagnosis of rheumatoid arthritis
Which joints are involved in different conditions in hand?