We report a case in which a sacrococcygeal teratoma was identified and characterized on prenatal and postnatal MRI, and correlated with subsequent surgical resection.

A case of immature gastric teratoma in a neonate is being reported here. The neonate was presented with abdominal mass and distension and managed with excision of mass; the patient is doing fine postoperatively.

Growing tumor syndrome (GTS) occurs rarely in women with immature ovarian teratoma. Unlike many malignancies, it can be successfully treated chemotherapy and fertility-sparing surgery. Early diagnosis is crucial to avoid unnecessarily aggressive treatment.