 Nephrotic syndrome , in which protein from the bloodstream is released into the urine due to kidney diseases , can predispose to thrombosis ; this is particularly the case in more severe cases ( as indicated by blood levels of albumin below 25 g / l ) and if the syndrome is caused by the condition membranous nephropathy . Inflammatory bowel disease ( ulcerative colitis and Crohn 's disease ) predispose to thrombosis , particularly when the disease is active . Various mechanisms have been proposed . 
