Autoimmune Pancreatitis Accompanied by Tubulointerstitial Nephritis

A Case of IgG4-Related Pancreas and Kidney Disease Mimicking a Renal Pelvic Malignancy

“…patterns are relatively rare [3,4]. Differentiating IgG4-related sclerosing disease involving the kidney as a mass-like lesion from renal malignancies is difficult; therefore, many cases are diagnosed after surgical removal of the renal masses [5,6].…”

“…Unfortunately, differentiating autoimmune renal involvement disease with a malignant mass is difficult using radiological criteria alone. Autoimmune kidney disease has been mistaken for a malignant mass in many reports and diagnosed only after invasive operations [5,6]. To date, a total of four domestic cases of IgG4-related disease involving the kidney have been reported, and two patients who presented with a renal mass underwent nephrectomy due to the unclear differential diagnosis with malignancy.…”

“…To date, a total of four domestic cases of IgG4-related disease involving the kidney have been reported, and two patients who presented with a renal mass underwent nephrectomy due to the unclear differential diagnosis with malignancy. The patients were diagnosed with IgG4-related sclerosing disease involving the kidney after several years [6].…”