%0 Journal Article %T Una causa infrecuente de tromboembolismo pulmonar %A Sancho-Chust %A J. N. %A Chiner-Vives %A E. %A Luz Andreu-Rodr¨ªguez %A A. %A Llombart-Cant¨® %A M. %A Senent-Espa£¿ol %A C. %A Mediero-Carrasco %A G. %J Anales de Medicina Interna %D 2008 %I Scientific Electronic Library Online %R 10.4321/S0212-71992008000400008 %X we present a case of pulmonary thromboembolism in a young patient triggered by a long haul travel, in which a homocygotic mutation in the gene of the metilentetrahidrofolate reductase was demonstrated. this mutation can cause hyperhomocysteinemia that is a recognized risk factor for venous thromboembolism (vte). in the management of these patients, the levels of homocysteine should be lowered, as well as use of thromboprophylaxis before transitory risk situations. it is important to know when the screening should be performed, because they are behind an important number of cases of vte. %K inherited thrombophilia %K methylenetetrahydrofolate reductase %K hyperhomocysteinemia %K venous thromboembolism %K pulmonary thromboembolism %K economy class syndrome. %U http://scielo.isciii.es/scielo.php?script=sci_abstract&pid=S0212-71992008000400008&lng=en&nrm=iso&tlng=en