In neonates, teratomas infrequently involve the abdomen: among 51 known cases, 39 were gastric teratomas, which account for less than 2% of all germ cell tumors in the neonatal period. Associated malformations are minor, located in the region of the tumor, and apparently less frequent than in other sites. Malignancy is exceedingly rare (a single case) and well controlled as a result of the anti-tumor processes specific to the neonatal period. Gastric teratomas are diagnosed early and can be cured by tumorectomy removing a thin ring of the surrounding stomach wall.
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