We report a case of meconium pseudocyst evaluated by prenatal MR imaging. The unusual features were its huge size, the absence of meconium peritonitis, and its development late in fetal life. The case also demonstrates a possible diagnostic pitfall since it suggests that rapid deterioration of a mechanically compensated bowel obstruction may occur, potentially occurring only after an MRI study has been performed.

• MeSH
• atrézie střev komplikace   diagnóza   MeSH
• cysty diagnóza   etiologie   MeSH
• dospělí MeSH
• ileum abnormality   MeSH
• lidé MeSH
• magnetická rezonanční tomografie * MeSH
• mekonium * MeSH
• nemoci plodu diagnóza   MeSH
• novorozenec nedonošený MeSH
• novorozenec MeSH
• prenatální diagnóza * MeSH
• těhotenství MeSH
• ultrasonografie prenatální MeSH
• volvulus intestini komplikace   diagnóza   MeSH
• Check Tag
• dospělí MeSH
• lidé MeSH
• novorozenec MeSH
• těhotenství MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• kazuistiky MeSH

BACKGROUND: Ultrafast T2-weighted (T2-W) MRI sequences are currently considered a routine technique for fetal MR imaging. Limited experience exists with fetal T1-weighted (T1-W) imaging techniques. OBJECTIVE: To determine MRI patterns of some fetal abdominal or haemorrhagic disorders with particular respect to the diagnostic value of T1-W images. MATERIALS AND METHODS: In addition to standard T2-W single-shot sequences, T1-W single-shot and/or multislice sequences were employed in 25 MR examinations performed in 23 fetuses between 20 and 36 weeks of gestation for more detailed assessment of liver, meconium-filled digestive tract, haemorrhage, or further characterization of a fetal abdominal mass. Diagnostic value and presence of motion artefacts on T1-W images was recorded in each case. RESULTS: T1-W images enabled superior delineation of fetal liver and large intestine. They provided additional diagnostic information in 9 (39%) of 23 fetuses. One false-positive and one false-negative MRI diagnosis of malrotation anomaly were encountered. Use of single-shot T1-W sequences reduced the occurrence of motion artefacts in 64%. CONCLUSION: Our results suggest that the specific signal properties of methaemoglobin, meconium and liver are sufficiently important for T1-W sequences to become a routine part of fetal MRI protocols when dealing with digestive tract anomalies, diaphragmatic and abdominal wall defects, intraabdominal masses, and fetal haemorrhage.

• MeSH
• břicho abnormality   MeSH
• druhý trimestr těhotenství MeSH
• játra abnormality   MeSH
• krvácení diagnóza   MeSH
• lidé MeSH
• magnetická rezonanční tomografie * MeSH
• mekonium MeSH
• prenatální diagnóza metody   MeSH
• retrospektivní studie MeSH
• těhotenství MeSH
• třetí trimestr těhotenství MeSH
• Check Tag
• lidé MeSH
• těhotenství MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH