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Intracavernous Schwannoma Characterized With 18F-FDG, 68Ga-DOTATOC, and 18F-Choline PET
Julien Farce1, Isabelle Lecouillard2, Béatrice Carsin Nicol3
1From the Departments of Nuclear Medicine.
Abstract:
We report the case of a 75-year-old man with history of prostate cancer whose left intracavernous lesion was successfully characterized by 3 PETs performed successively with different tracers. This poorly characterized tumor was initially discovered on an MRI conducted to investigate an acute diplopia and slowly growing during follow-up. On 18F-FDG PET, the lesion showed no significant uptake, and no extracranial lesion was found nor did it have increased 68Ga-DOTATOC uptake. Finally, this tumor displayed a high 18F-choline uptake, and no extracranial lesion was revealed with this tracer. The diagnosis of schwannoma without malignancy criterion was proven by biopsy.
Insights
Three PET scans using different tracers helped characterize a rare intracavernous tumor in a prostate cancer patient. Fluorine-18 choline PET revealed high uptake, aiding in the schwannoma diagnosis.
Area of Science:
- Oncology
- Neurology
- Radiology
Background:
- A 75-year-old man with a history of prostate cancer presented with acute diplopia.
- An MRI revealed a slowly growing, poorly characterized lesion in the left intracavernous region.
