A 22-year-old woman was admitted on account of painless gross haematuria and low-grade fever. She had no known systemic disease, but had experienced episodes of microscopic and macroscopic haematuria in the past decade. Her recent history included weight loss of 5 kg due to poor diet and her body mass index was 18.5 kg/ m2. Both the creatinine clearance rate and daily urine protein excretion were within the normal range. Tests for serum antinuclear antibodies, anti-neutrophil cytoplas-mic antibody, anti-double stranded DNA antibody, rheumatoid factor, immunoglobulin and C3 and C4 complement component levels and urine cytology were unrevealing. Microbiological investigations excluded the presence of urinary tract infection or systemic tuberculosis. Computed tomography (CT) revealed extrinsic compression of the left renal vein between the superior mesenteric artery (SMA) and the abdominal aorta (AA) (Fig 1). Magnetic resonance angiography (MRA) showed a markedly compressed left renal vein and an engorged tributary lumbar vein.
展开▼
