Pitfalls in imaging the submandibular glands with PET/CT

Area of Science:

• Nuclear medicine imaging
• Oncologic imaging
• Head and neck imaging

Background:

• Submandibular gland imaging is crucial for diagnosing malignant neoplastic processes.
• Fluorine-18 fluorodeoxyglucose-positron-emission tomography/computed tomography (FDG-PET/CT) is a key modality for malignancy detection, offering metabolic and anatomical insights.

Observation:

• FDG-PET/CT imaging of salivary glands presents unique challenges and potential pitfalls.
• Normal variations in radiotracer uptake can be misinterpreted as malignant findings.
• Physiologic uptake, benign conditions, and iatrogenic factors can also complicate interpretation.

Findings:

• The study reviews a specific case where compensatory hypertrophy of a submandibular gland was initially suspected to be a malignancy.
• This highlights the importance of recognizing non-neoplastic causes of increased FDG uptake.

Implications:

• Accurate interpretation of FDG-PET/CT in submandibular glands requires awareness of potential mimics of malignancy.
• Understanding these pitfalls can improve diagnostic accuracy and patient management.
• Distinguishing true neoplastic processes from benign conditions is essential for appropriate treatment planning.