We describe the case of an 86-year-old man presenting with clinical symptoms suggestive of Temporal Arteritis. The evolution of the case prompted extensive work-up, including temporal artery and kidney biopsy. Based on the clinical and pathological findings, a diagnosis of ANCA-negative granulomatous necrotizing vasculitis involving the small-, medium-, and large-size vessels was made. The patient was treated with prednisone and cyclophosphamide, which was later switched to rituximab. The patient remained asymptomatic under this regimen and stabilization of his kidney function was achieved.
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