Paraneoplastic IgA Vasculitis in an Older Adult With Metastatic Lung Adenocarcinoma

Immunoglobulin A (IgA) vasculitis is a rare disease in the older adult patient population. It is often triggered by an underlying etiology such as infection or malignancy. Paraneoplastic cases have been reported in the geriatric population in literature but the exact prevalence is unknown. Diagnosis requires satisfaction of both clinical and laboratory criteria, with additional emphasis on finding an underlying etiology. Treatment is focused on supportive care and may include immunosuppressive therapy. However, targeting the primary cause is also important for improving outcomes. Our patient in this report presented with a novel case of paraneoplastic IgA vasculitis that likely occurred secondary to lung adenocarcinoma.