Multimodal depiction of a rare immature gastric teratoma from fetus to infant.

Immature gastric teratomas are rare gastrointestinal tumors. Presented here are imaging findings of this neoplasm which was first seen via antenatal ultrasound. Subsequent fetal magnetic resonance imaging demonstrated a partially calcified mass that contained areas of diffusion restriction. Meconium pseudocyst was originally entertained as a differential consideration. Follow-up computed tomography and upper gastrointestinal fluoroscopy after delivery revealed a bilobed mass that was at least partially endogastric. Resection was performed, and the diagnosis was uncovered via histologic analysis.