The role of post-radiation therapy FDG PET in prediction of necessity for post-radiation therapy neck dissection in locally advanced head-and-neck squamous cell carcinoma

International Journal of Radiation Oncology, Biology, Physics
Min YaoJohn M Buatti

Abstract

The role of neck dissection after radiation therapy ([RT] with or without chemotherapy) for regionally advanced head and neck cancer is controversial. As much as 50% of residual lymphadenopathy after radiation has no viable tumor cells present on histopathologic analysis. [(18)F] fluorodeoxyglucose positron emission tomography (FDG PET) imaging can detect metabolically active cancer. This study examines the ability of post-RT FDG PET imaging to predict the tumor status of residual lymphadenopathy after nonsurgical management of regionally advanced neck disease. From February 2000 to October 2002, 41 patients were treated definitively by radiation (with or without chemotherapy) and underwent FDG PET and computed tomography (CT) imaging after treatment to assess response. Patients with negative CT and FDG PET scans were observed and did not undergo neck dissection. Patients with radiographically persistent lymphadenopathy underwent either neck dissection or fine-needle aspiration of the lymph nodes using ultrasound guidance. The results of the FDG PET scans were correlated with the pathologic findings. Twelve patients with persistent lymphadenopathy underwent either neck dissection or fine-needle aspiration. Four of the 12 were f...Continue Reading

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