SciELO - Scientific Electronic Library Online

 
vol.28 número12Efeitos da ingestão de glicose sobre a circulação materno-fetalCriopreservação de sêmen humano: comparação entre métodos de congelação e tipos de envase índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Revista Brasileira de Ginecologia e Obstetrícia

versão impressa ISSN 0100-7203versão On-line ISSN 1806-9339

Resumo

FRANCISCO, Viviane Vieira; GOLDMAN, Suzan Menasce; FARIA, Juliano  e  SZEJNFELD, Jacob. Value of magnetic resonance imaging in prenatal diagnosis of placental accretism. Rev. Bras. Ginecol. Obstet. [online]. 2006, vol.28, n.12, pp.700-707. ISSN 1806-9339.  https://doi.org/10.1590/S0100-72032006001200003.

PURPOSE: to establish the main signs of placental accretism in magnetic resonance imaging (MRI) in patients with clinical suspicion and to estimate the benefit of this method. METHODS: prospective transversal study with 15 patients suspected of placental accretism, referred between March 2003 and February 2006. Gestational age varied from 20 to 31 weeks. All patients underwent MRI to study the placenta and had previously done an ultrasonography. Material was sent to histological study. MRI was done on Magnetom Impact and Sonata Maestro Class Siemens®, with acquired sequences HASTE, TURBO SPIN in axial, sagittal, coronal planes and echo gradient (GE®), pre- and post-dynamic contrast in the best plan for acquisition. Images were analyzed by a team of two radiologists. RESULTS: mean gestational age was 24.3 weeks. We studied seven placenta previa (47%), six anterior placentas (40%) and two posterior placentas (13%). Ultrasonography was positive in 80% of the palcentas and MRI in 53%. However, echography had a low concordance with anatomic pathological studies by Kappa test (11%), revealing 75% of sensitivity, 14% of specificity, 50% as positive predictive value (PPV) and 33% as negative predictive value (NPV). MRI had an excellent concordance with anatomic pathological studies (0.86), showing 100% of sensitivity, 86% of specificity, 89% as PPV and 100% as NPV. CONCLUSIONS: MRI is useful for placental accretism diagnosis. The principal findings are transmural hyper-signal, the loss of continuity in myometrial wall in fast sequences and the identification of vessels invading myometrial layer in dynamic sequences.

Palavras-chave : Placenta accreta [diagnosis]; Magnetic resonance imaging.

        · resumo em Português     · texto em Português     · Português ( pdf )

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons