Abstract
Background18F-fluoro-2-deoxy-D-glucose (18F-FDG) accumulations are commonly seen in the neck-related muscles of the surgical and non-surgical sides after surgery with neck dissection (ND) for oral cancers, which leads to radiologists having difficulty in diagnosing the lesions. To examine the alterations in 18F-FDG accumulation in neck-related muscles of patients after ND for oral cancer.Material and Methods18F-FDG accumulations on positron emission tomography (PET)-computed tomography (CT) in neck-related muscles were retrospectively analyzed after surgical dissection of cervical lymph nodes in oral cancers.ResultsAccording to the extent of ND of cervical lymph nodes, the rate of patients with 18F-FDG-PET-positive areas increased in the trapezius, sternocleidomastoid, and posterior neck muscles of the surgical and/or non-surgical sides. In addition, SUVmax of 18F-FDG-PET-positive areas in the trapezius and sternocleidomastoid muscles were increased according to the extent of the ND.ConclusionsIn evaluating 18F-FDG accumulations after ND for oral cancers, we should pay attention to the 18F-FDG distributions in neck-related muscles including the non-surgical side as false-positive findings. Key words:18F-FDG, PET-CT, oral cancers, muscles.
Highlights
Surgical dissections are usually performed for patients with oral cancers and metastatic lymph nodes
In evaluating 18F-FDG accumulations after neck dissection (ND) for oral cancers, we should pay attention to the 18F-FDG distributions in neck-related muscles including the non-surgical side as false-positive findings
In our experience, 18F-FDG accumulations are commonly seen in the neck-related muscles of the surgical and non-surgical sides after surgery with neck dissection (ND) for oral cancers, which leads to radiologists having difficulty in diagnosing the lesions
Summary
Surgical dissections are usually performed for patients with oral cancers and metastatic lymph nodes. Positron emission tomography (PET)-CT using fluorine-18-labeled (18F) fluoro-2-deoxy-D-glucose (18F-FDG) should be used to evaluate recurrence of oral cancers and metastatic lymph nodes, and the clinical applications of this modality have expanded widely [1,2,3,4,5,6]. To the best of our knowledge, there have been no reports on 18F-FDG distribution in neck-related muscles of the oral and maxillofacial regions after surgery with ND for oral cancer. The alterations in the 18F-FDG distributions in neck-related muscles of the oral and maxillofacial regions before and after surgery with ND for oral cancer were analyzed
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