Incidental Thyroid Carcinoma by FDG-PET/CT: A Study of Clinicopathological Characteristics

被引:12
作者
Law, T. T. [1 ]
Lang, Brian Hung-Hin [1 ,2 ]
机构
[1] Univ Hong Kong, Dept Surg, Div Endocrine Surg, Hong Kong, Hong Kong, Peoples R China
[2] Queen Mary Hosp, Dept Surg, Div Endocrine Surg, Hong Kong, Hong Kong, Peoples R China
关键词
POSITRON-EMISSION-TOMOGRAPHY; DISTINCT TUMOR FOCI; PAPILLARY MICROCARCINOMA; CANCER; NODULES; PREVALENCE; MALIGNANCY; METASTASIS; RISK; NECK;
D O I
10.1245/s10434-010-1287-6
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
The rising incidence of incidental thyroid carcinoma (ITC) detected during fluoro-2-deoxy-d-glucose (FDG)-positron emission tomography (PET)/computed tomography (CT) scanning poses a challenge to clinicians. The present study aims to critically evaluate the clinicopathological characteristics of ITC detected by FDG-PET/CT. Among the 557 patients managed at our institution, 40 (7.2%) patients were identified as having ITC. Of these, 22 patients had their tumor detected by FDG-PET/CT (PET group) and 11 by ultrasonography (USG group). Additional bedside ultrasonography +/- A fine-needle aspiration (FNA) was done in all patients at their clinic visit. The clinicopathological characteristics were compared between the PET and USG groups. The PET group had significantly more patients with history of nonthyroidal malignancy (P < 0.001). Papillary carcinoma was the most common histological type in both groups. Despite having similar histological and prognostic features including tumor size, tumor multifocality, capsular invasion, extrathyroidal extension, and lymph node metastases, tumor bilaterality (or presence of contralateral tumor focus) was significantly more frequent in the PET than the USG group (P = 0.04). The tumors were also more advanced by the tumor-node-metastasis (TNM) staging system in the PET group (P = 0.021). None of the contralateral tumor foci were evident preoperatively. One patient in the USG group developed metastatic thyroid carcinoma in neck lymph nodes 28 months after thyroid resection. ITC by FDG-PET/CT had higher incidence of tumor bilaterality than those detected by ultrasonography. Total thyroidectomy should be considered for ITC detected by FDG-PET/CT even for tumor size < 10 mm.
引用
收藏
页码:472 / 478
页数:7
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