Final answer:
In 90% of Rheumatoid Arthritis patients, the common labs present are rheumatoid factor (RF) and anticyclic citrullinated peptide antibodies (anti-CCP), as well as elevated levels of C-reactive protein (CRP) and erythrocyte sedimentation rate (ESR).
Step-by-step explanation:
Laboratory tests that are present in 90% of patients with Rheumatoid Arthritis typically include rheumatoid factor (RF) and anticyclic citrullinated peptide antibodies (anti-CCP). Additionally, elevated levels of acute-phase proteins such as C-reactive protein (CRP) and erythrocyte sedimentation rate (ESR) are often seen in these patients. These tests, along with clinical assessments such as joint inflammation symptoms and imaging techniques like X-ray, MRI, and arthrography, assist rheumatologists in diagnosing RA.