Pterygoid Base Pneumatization Simulating Residual Disease-A Pitfall of Structural Imaging in Juvenile Nasal Angiofibroma.

Abstract: As prostate-specific membrane antigen (PSMA) expression is universal in juvenile nasopharyngeal angiofibroma, it is commonly used for specifically differentiating recurrences from surgical site reparative tissues. Postoperative contrast-enhanced MRI revealed a residual disease in the left pterygoid base, but there was no PET/CT uptake with 68Ga-labeled PSMA at the same site. In retrospect, in comparison with preoperative PET/CT, it was found that the pterygoid base pneumatization was showing enhancement in contrast-enhanced MRI and not in functional PSMA. Postoperative 68Ga-PSMA PET/CT is a useful clinical tool in ambivalent diagnostic conditions avoiding morbidities.
Competing Interests: Conflicts of interest and sources of funding: none declared.
(Copyright © 2021 Wolters Kluwer Health, Inc. All rights reserved.)