Issue N# 3 - 2006
CERVICO-FACIAL CARCINOLOGY
Parapharyngeal lymph node metastasis of a papillary thyroid carcinoma: Interest of the Pet Scan
Authors : F. Turner, J. Paris, A. Giovanni, M. Zanaret (Marseille)
Ref. : Rev Laryngol Otol Rhinol. 2006;127,3:175-178.
Article published in french 
Downloadable PDF document french
Summary :
Thyroid cancer rarely metastasizes to the parapharyngeal space. A inconsistent lymphatic drainage pathway is involved, as described by Rouvière. Objectives: To demonstrate the interest of [18 F]-FDG PET in early diagnosis of metastasis and in the follow up of the patient. Material and method: 40 y.o. male with papillary carcinoma who had a secondary parapharyngeal metastasis. The diagnosis of recurrence was difficult, as the plasmatic thyglobulin was low, and the iodine scan was not informative. In this case, [18 F]-FDG PET-CT was informative (clear parapharyngeal fixation) and led to the diagnosis of recurrence. Conclusion: It appears that 18F FDG PET has a good diagnostic value and that its sensitivity is better than CT scan and MRI. Some authors recommend the use of [18 F]-FDG PET and scintigraphy with Iodine 131 to screen patients with thyroid cancer recurrences.
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