Fetus in fetu (FIF) is an extremely rare anomaly. It is predominantly seen retroperitoneally in 80% of cases but can present at atypical sites like the skull, sacrum, scrotum and the mouth. We reported a rare case of intracranial parasitic fetus. We described the prenatal and postnatal MRI findings of the case. There was no obvious spinal signal on the imaging findings at 35 weeks of gestation. However, the postnatal MRI revealed spinal column signal at 5 months and 11 days.

中文翻译：

---

颅内寄生胎儿的产前和产后MRI影像学发现：一例报告。

胎儿胎（FIF）是极为罕见的异常。80％的病例主要在腹膜后可见，但可出现在非典型部位，如头骨，ac骨，阴囊和口中。我们报道了颅内寄生胎儿的罕见病例。我们描述了该病例的产前和产后MRI发现。妊娠35周时，影像学检查结果无明显脊髓信号。但是，产后MRI在5个月和11天时发现了脊柱信号。