Point‐of‐care ultrasound differentiated the cause of proteinuria in a patient with lung cancer.

This article focuses on the utility of point-of-care ultrasound (POCUS) in diagnosing and managing kidney dysfunction and proteinuria caused by congestive kidney injury secondary to obstructive heart failure from metastatic pericardial effusion in a patient with advanced lung adenocarcinoma. Using POCUS and the venous excess ultrasound score (VExUS) grading system, clinicians identified moderate kidney congestion, guiding prompt pericardial drainage that improved the patient’s kidney function and proteinuria. The report emphasizes POCUS as a rapid bedside tool that aids nephrologists in differentiating causes of proteinuria, particularly distinguishing congestive kidney injury from chemotherapy-related effects, and highlights its growing role in nephrology practice.