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Background: Neonatal tumors are usually prenatally diagnosed or within the irst 30 days of life. The true incidence of<br />neonatal tumors is unknown as a great number of pregnancies with a prenatally diagnosed mass result in stillbirth or<br />miscarriage. Most solid neonatal tumors are benign whereas less than 50% of neonatal neoplasms are malignant;<br />however, some tumors with malignant patterns may histologically show benign behaviors. The incidence of malignant<br />tumors is 1 in every 12,500-27,500 live births, accounting for 2% of all childhood cancers. Teratomas are the most<br />common perinatal neoplasms, accounting for 25-33% of the cases. Around two-thirds of all sacrococcygeal teratomas<br />(SCTs) are reported in the neonatal period but with a small risk of malignancy.<br />Case report: Herein, we reported a case of SCT in a newborn leading to a complicated cesarean delivery.<br />Conclusion: In general, teratomas are embryonic typically benign tumors arising from germ cells. They usually consist<br />of various tissues originating from two or more embryonic layers. These tumors are believed to be the most common<br />neonatal germ cell tumors. The sacrococcygeal region is the most common site for extragonadal teratomas formation.