Paraneoplastic Focal Segmental Glomerulosclerosis in Association With Colon Cancer: A Rare Clinical Case Report.

In patients with malignancy, the development of new-onset nephrotic syndrome should prompt consideration of paraneoplastic focal segmental glomerulosclerosis and prompt early renal biopsy, guiding integrated oncologic and nephrologic management even when proteinuria persists. Timely diagnosis may influence both cancer treatment and renal outcomes, enhancing patient care despite advanced disease.