Polymyalgia Rheumatica Complicated by Nephrotic Syndrome in a Nonagenarian: A Case Report.

This case report describes a 91-year-old bedridden man with a complex medical history who presented with fever and low oxygen saturation, suspected to be aspiration pneumonia. Further investigation revealed nephrotic syndrome, microscopic hematuria, and joint pain. The diagnosis of polymyalgia rheumatica (PMR) was considered due to the presence of characteristic symptoms and elevated inflammatory markers despite the inability to perform a kidney biopsy. The patient was treated with low-dose prednisolone (PSL), leading to significant improvement in joint pain, renal function, and overall condition. This case highlights the importance of considering PMR in elderly patients with unexplained nephrotic syndrome and systemic inflammation. Early diagnosis and corticosteroid treatment can improve clinical outcomes and enhance activities of daily living. This report underscores the need for awareness of PMR as a potential cause of nephrotic syndrome in the elderly and the effectiveness of PSL in managing such cases.