4.Renal Vein thrombosis: History: This patient has been admitted on previous occasions this year: 1) april - May for acute left renal vein thrombosis which presented as left loin pain and nephritic syndrome. 2) June-July for recurrent pulmonary thrombo-emblism with pulmonary infarcts bilaterally. At this time he was also found to have persistent proteinuria and hypoalbuminaemia. He responded favourably to anticoagulant therapy which was maintained until the end of September, when he failed to re-attend the P I clinic and stopped his drugs. Present illness: 2 days prior to admission he was awoken by severe costovertebral angle pain, this time on the right side which persisted for several hours. This was followed by increasing ankle oedema. There was no haematuria
