Primary Intracranial Neuroendocrine Carcinoma Revealed by 18 F-FDG PET/CT

Area of Science:

• Neuro-oncology
• Medical Imaging
• Pathology

Background:

• Neuroendocrine carcinoma (NEC) is a rare, aggressive malignancy typically originating in the gastrointestinal tract or lungs.
• Primary intracranial NEC is exceptionally uncommon, with scarce case reports available.
• Understanding the imaging features of rare brain tumors is crucial for diagnosis and management.

Purpose of the Study:

• To report the distinctive FDG PET/CT imaging findings of a rare case of primary intracranial neuroendocrine carcinoma.
• To contribute to the limited literature on primary intracranial NEC, focusing on its radiological presentation.
• To emphasize the utility of FDG PET/CT in characterizing such rare lesions.

Main Methods:

• Case presentation of a patient with primary intracranial NEC.
• Detailed analysis of fluorine-18 fluorodeoxyglucose Positron Emission Tomography/Computed Tomography (FDG PET/CT) imaging.
• Correlation of imaging findings with histopathological data (implied).

Main Results:

• The intracranial NEC presented as a large cystic-solid mass within the cerebral parenchyma.
• FDG PET/CT demonstrated intense radiotracer uptake in the irregular rim and solid components of the mass.
• The imaging pattern suggests aggressive tumor characteristics.

Conclusions:

• FDG PET/CT can reveal characteristic imaging findings for primary intracranial NEC.
• The intense FDG uptake in the rim and solid portions is a key imaging feature.
• This case underscores the importance of considering rare neuroendocrine tumors in the differential diagnosis of intracranial masses.