Fetal intracranial tumors are very rare

accounting for 10% of fetal tumors. They are mainly in the third trimester of pregnancy and often lead to intrauterine fetal death or neonatal death. Most of the previously reported fetal intracranial tumors are benign

growing in sacrococcygeal

intracranial

oral

gastric and other parts

and few teratomas grow from intracranial to extraoral. The examination should be increased in the fourth and third trimester of pregnancy to reduce the missed diagnosis of abnormal pregnancy. At the same time

the intracranial structure of the fetus should be observed more to see whether there are abnormal changes in the whole growth process.