• Systemic organ involvement and vascular pathology unify rheumatoid arthritis across organ systems, highlighting arteritis, vascular lesions, and cardiac manifestations as core disease processes [4], [5], [6], [7], [12].

• Immunoserology reveals autoantibody-like responses and serologic biomarkers with multiple hemagglutination studies and serum protein analyses shaping autoimmune understanding in RA [10], [11], [14], [17], [19].

• Endocrine modulation and therapeutic criteria influenced early RA management, integrating adrenal cortex hormone effects with guideline-like treatment criteria to guide responses [3], [8].

• Infectious factors and preventive strategies anchor a preventive paradigm, linking streptococcal infections to rheumatic activity and supporting prophylaxis to reduce recurrences [9], [13], [16].

• Pathology-focused lesion patterns illuminate disease biology, from arteritis of striated muscle to vertebral nodules and febrile rheumatism tissue changes, highlighting non-joint pathology [1], [15], [20].