Cardoso, FPires, JMiranda, JAraújo, JM2012-08-282012-08-282012BMJ Case Rep. 2011 Aug 4;2011. pii: bcr0520114220. doi: 10.1136/bcr.05.2011.4220.1757-790Xhttp://hdl.handle.net/10400.10/671Primary myelofibrosis is one of the entities that may manifest with lesions of extramedullary haematopoiesis, especially in spleen and liver. The authors report a case of primary myelofibrosis presenting incidentally as an intrahepatic focal lesion of extramedullary haematopoiesis, a rare occurrence that highlights the challenge of hepatic nodule differential diagnosis, and allows reflection about the diagnostic criteria and prognostic factors of this myeloproliferative diseaseengMielofibrose primáriaHematopoese extramedularNeoplasias do fígadoDiagnóstico diferencialPrimary myelofibrosisExtramedullary haematopoiesisHepatic nodulejournal article