F-18-DOPA-accumulating Meningioma Suspicious for an Intracranial Metastasis of Medullary Thyroid Cancer

A 57-year-old woman was referred to our department for a whole-body F-18-DOPA PET/CT scan after surgical treatment of medullary thyroid cancer to exclude metastases as the reason for persistent low-level calcitonin. The PET/CT showed an area of increased tracer uptake in the frontal right skull, being otherwise unremarkable. Subsequent MRI performed to exclude an intracranial metastasis displayed a lesion consistent with a meningioma. No metastases of thyroid cancer were found, and the patient underwent surveillance.