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Spectrum of ¹⁸F-FDG PET/CT Findings in Oncology-Related Recurrent Laryngeal Nerve Palsy

¹ Department of Radiology/Nuclear Medicine, University of Michigan Medical Center, B1G 505G University Hospital, 1500 E Medical Center Dr., Ann Arbor, MI 48109-0028.
² Department of Nuclear Medicine, Department of Veterans Affairs Ann Arbor Health Care System, Ann Arbor, MI.

OBJECTIVE. The objective of our study was to review recurrent laryngeal nerve (RLN) anatomy and describe the typical ¹⁸F-FDG (FDG) PET/CT appearance of vocal cord paresis due to oncology-related RLN injury including a spectrum of presentations, causes, and sites of nerve injury.

CONCLUSION. Oncology-related RLN palsy may be caused by direct tumor invasion or its therapy. FDG PET/CT findings should be recognized to avoid misdiagnosis. Laryngoscopy confirms the suspected diagnosis and excludes primary vocal cord neoplasm.

Keywords: laryngeal nerves • oncologic imaging • PET/CT • recurrent laryngeal nerve palsy • vagus nerve • vocal cord paresis

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