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Case Reports in Oncological Medicine
Volume 2015, Article ID 617294, 4 pages
http://dx.doi.org/10.1155/2015/617294
Case Report

Left Vocal Cord Paralysis Detected by PET/CT in a Case of Lung Cancer

1Nuclear Medicine Department, School of Medicine, Afyon Kocatepe University, 03200 Afyon, Turkey
2Nuclear Medicine Department, School of Medicine, Akdeniz University, 07070 Antalya, Turkey
3Nuclear Medicine Department, Antalya Training and Research Hospital, Antalya, Turkey
4Nuclear Medicine Department, Isparta State Hospital, Isparta, Turkey

Received 6 September 2015; Accepted 18 October 2015

Academic Editor: Jose I. Mayordomo

Copyright © 2015 Ali Ozan Oner et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We report a patient with lung cancer. The first PET/CT imaging revealed hypermetabolic mass in the left aortopulmonary region and hypermetabolic nodule in the anterior segment of the upper lobe of the left lung. After completing chemotherapy and radiotherapy against the primary mass in the left lung, the patient underwent a second PET/CT examination for evaluation of treatment response. This test demonstrated, compared with the first PET/CT, an increase in the size and metabolic activity of the primary mass in the left lung in addition to multiple, pathologic-sized, hypermetabolic metastatic lymph nodes as well as multiple metastatic sclerotic areas in bones. These findings were interpreted as progressive disease. In addition, an asymmetrical FDG uptake was noticed at the level of right vocal cord. During follow-up, a laryngoscopy was performed, which demonstrated left vocal cord paralysis with no apparent mass. Thus, we attributed the paralytic appearance of the left vocal cord to infiltration of the left recurrent laryngeal nerve by the primary mass located in the apical region of the left lung. In conclusion, the knowledge of this pitfall is important to avoid false-positive PET results.