Mascarenhas, AEusébio, MFreitas, OAlmeida, T2013-11-192013-11-192011BMJ Case Reports 2011 Feb 17; doi:10.1136/bcr.12.2010.3618http://hdl.handle.net/10400.17/1555Acquired factor X deficiency is an extremely rare situation. It has shown to be associated with systemic amyloidosis, respiratory mycoplasma infection, factor X inhibitors, antiphospholipid antibodies, vitamin K defi ciency/liver disease as well as the use of certain medications (meropenem, valproic acid). The pathogenesis and transient nature of this deficit remain poorly understood. The authors describe the case of a teenager hospitalised for extensive burns that developed active bleeding after removal of central venous catheter. He was diagnosed with transient factor X deficiency. Normalisation of coagulation status and factor X levels occurred spontaneously 10 days after the bleeding episode.engFactor XQueimadurasAdolescenteHDE PEDHDE HEM PEDjournal article