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5.
Acta Radiol ; 52(9): 1032-6, 2011 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-21948596

RESUMO

BACKGROUND: Only a few studies have used in/opposed phase method for a quantitative evaluation of fat fraction in the spine. PURPOSE: To compare multivoxel proton MR spectroscopy and chemical-shift gradient-echo MR imaging for bone marrow fat quantification in vertebral compression fractures (VCF). MATERIAL AND METHODS: Vertebral marrow fat quantification in fifteen patients was measured at 3.0-T. Multi-voxel proton spectroscopy (MRS) and in/opposed-phase MR imaging using a fat map build with a triple-echo gradient-echo sequence was used. All the patients had benign vertebral collapse. Bone marrow fat content was evaluated by both techniques in compressed (acute or chronic) and in non-compressed vertebrae. RESULTS: The percentage of fat fraction measured by the triple-echo sequence was well correlated with those calculated by MRS (r(2) = 0.85; P < 10(-4)). There was a significant decrease of fat fraction in acute VCF versus both chronic VCF (P < 10(-9)) and non-fractured vertebrae (P < 10(-7)). There was no significant difference in fat fraction evaluated by both techniques between non-fractured vertebrae and chronic VCF. CONCLUSION: We have validated the in/opposed phase method compared with MRS for vertebral bone marrow fat quantification. The fat mapping using a triple-echo gradient-echo sequence allows distinguishing acute and chronic benign VCF.


Assuntos
Medula Óssea/química , Fraturas por Compressão/metabolismo , Lipídeos/análise , Imageamento por Ressonância Magnética/métodos , Espectroscopia de Ressonância Magnética/métodos , Osteoporose/metabolismo , Fraturas da Coluna Vertebral/metabolismo , Doença Aguda , Adulto , Idoso , Idoso de 80 Anos ou mais , Doença Crônica , Feminino , Humanos , Masculino , Pessoa de Meia-Idade
6.
Acta Haematol ; 119(1): 12-4, 2008.
Artigo em Inglês | MEDLINE | ID: mdl-18176074

RESUMO

We report the case of a 54-year-old patient presenting with a typical pernicious anaemia. His mother was diagnosed with unquestionable pernicious anaemia 5 years previously. Serum ferritin was strongly increased (1,160 microg/l, normal range 29-380), with a transferrin saturation of 95%. We found a homozygous C282Y mutation of the HFE gene in our patient, his mother being heterozygous. The son of our patient was compound C282Y/H63D heterozygous without detectable pernicious anaemia. This seems to be the first report of an association between familial pernicious anaemia and hereditary haemochromatosis. The simultaneous occurrence of the 2 diseases in the same patient helps to delineate the relative contribution of each of them to iron metabolism and erythropoiesis: iron overload was only moderately increased and responded rapidly to phlebotomies, whereas haemochromatosis did not modify the cytologic presentation of pernicious anaemia.


Assuntos
Anemia Perniciosa/complicações , Hemocromatose/complicações , Adulto , Anemia Perniciosa/tratamento farmacológico , Anemia Perniciosa/genética , Hemocromatose/genética , Proteína da Hemocromatose , Antígenos de Histocompatibilidade Classe I/genética , Humanos , Masculino , Proteínas de Membrana/genética , Pessoa de Meia-Idade , Mutação , Vitamina B 12/administração & dosagem , Vitamina B 12/sangue , Vitamina B 12/uso terapêutico
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