The costovertebral angle (CVA) is located on your back at the bottom of your ribcage. Pain in this area is typically related to the kidneys, but it can have other causes. Talk with your doctor if ...

3. A lump or swelling in the side (flank) area. A firm mass or swelling in your side could indicate a tumour in or near the kidney. This is more often picked up during scans for unrelated issues ...

On day 5 of her treatment, the patient complains of "tenderness" over her right flank area and slight shortness of breath. An oxygen saturation study is done and it is found to be 89% on room air.