Purpose or Case Report: We present a case of expansion in the oral cavity, referred from routine antenatal ultrasound screening to fetal MRI in 24^th gestational week for extension of diagnostic information concerning predominantly the character of tissue and relationship to adjacent structures. The aim of the presentation, which includes two fetal MRI and one MR performed immediately postnatal, is to specify which details could be obtain by evaluating the fetal MRI in such type of diagnoses and what is their practical application for influencing the outcome of the baby. Orofaryngeal teratomas are exceedingly rare and despite their usual benign histopathology they are potentially lethal due to airway obstruction. Complete surgical resection is the guiding principle of usually urgent postnatal management. The role of imaging method and MRI, with its tissue contrast, is the best method of the choice , is to establish the level of the airway compression, to specify the extent of the lesion for facilitating the postnatal planning , including the approach for resection . We emphasized some question the radiologist could be asked by involved surgeon, especially concerning the tongue involvement, as this factor definitely influenced the quality of life.
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