Peritoneal and Nodal Gliomatosis Mimicking Metastasis on FDG PET/CT in a Patient With Ovarian Immature Teratoma

Peritoneal and nodal gliomatosis is a rare disease condition characterized by implants of mature glial tissue on the peritoneum and lymph nodes. It is typically associated with teratoma and has no adverse effect on prognosis. We present a case of 22-year-old woman who underwent FDG PET/CT for the staging of ovarian immature teratoma. PET/CT revealed mildly increased FDG uptake in the peritoneal cavity and increased FDG uptake in the internal mammary and cardiophrenic angle lymph nodes, which were histopathologically diagnosed as peritoneal and nodal gliomatosis. This case suggests that PET/CT findings of peritoneal and nodal gliomatosis could mimic metastasis.

Automated summary

Peritoneal and nodal gliomatosis is a rare disease characterized by mature glial tissue growth on the peritoneum and lymph nodes. It is often associated with teratoma and does not affect prognosis. We present a case of a 22-year-old woman with ovarian immature teratoma, where PET/CT revealed FDG uptake in the peritoneal cavity and lymph nodes, which were diagnosed as peritoneal and nodal gliomatosis.