Seronegative Rheumatoid Arthritis in an Elderly Dialysis Patient With Multiple Comorbidities: A Case Report.

The diagnosis of autoimmune diseases in elderly, immunocompromised patients undergoing dialysis poses significant challenges due to the diverse etiology of symptoms such as fever and systemic pain. This case study reports on a 79-year-old man undergoing hemodialysis with a history of multiple comorbidities, including diabetes, heart failure, and pure red cell aplasia. He presented with subacute polyarthritis and fever and was ultimately diagnosed with seronegative rheumatoid arthritis. The case illustrates the complexities of differential diagnosis in this population, emphasizing the need for a systematic approach to distinguish between possible infectious and autoimmune causes. Despite the absence of rheumatoid factor and anti-citrullinated protein antibody, the patient's clinical presentation and response to steroids supported the diagnosis of seronegative rheumatoid arthritis. Treatment with prednisolone resulted in significant improvement in symptoms and quality of life, demonstrating the effectiveness of steroids in managing autoimmune conditions in elderly, high-risk patients. However, such treatment necessitates careful monitoring due to potential adverse effects. This case underlines the importance of considering autoimmune diseases in differential diagnoses and customizing treatment strategies to accommodate the unique needs of elderly, immunocompromised patients on dialysis. Insights from this case contribute to better understanding and management of complex clinical scenarios in similar patient populations.