Haematuria and abdominal aortic aneurysm

Haematuria and left loin pain in a patient with abdominal aortic aneurysm and associated with the radiological finding of a poorly or non-functioning left kidney are the pathognomonic features of aorto-left renal vein fistula, a condition in which the aneurysm leaks into an anomalous retro-aortic left renal vein.