Bae Ja Seong, Chae Byung Joo, Park Woo Chan, Kim Jeong Soo, Kim Sung Hoon, Jung Sang Seol, Song Byung Joo
Department of Surgery, The Catholic University of Korea, Seoul, Korea.
World J Surg Oncol. 2009 Aug 10;7:63. doi: 10.1186/1477-7819-7-63.
Incidentally found thyroid lesions are frequently detected in patients undergoing FDG-PET/CT. The aim of this study was to investigate the prevalence of incidentally found thyroid lesions in patients undergoing FDG-PET/CT and determine the risk for thyroid cancer.
FDG-PET/CT was performed on 3,379 patients for evaluation of suspected or known cancer or cancer screening without any history of thyroid cancer between November 2003 and December 2005. Medical records related to the FDG-PET/CT findings including maximum SUV(SUVmax) and pattern of FDG uptake, US findings, FNA, histopathology received by operation were reviewed retrospectively.
Two hundred eighty five patients (8.4%) were identified to have FDG uptake on FDG-PET/CT. 99 patients with focal or diffuse FDG uptake underwent further evaluation. The cancer risk of incidentally found thyroid lesions on FDG-PET/CT was 23.2% (22/99) and the cancer risks associated with focal and diffuse FDG uptake were 30.9% and 6.4%. There was a significant difference in the SUVmax between the benign and malignant nodules (3.35 +/- 1.69 vs. 6.64 +/- 4.12; P < 0.001). There was a significant correlation between the SUVmax and the size of the cancer.
The results of this study suggest that incidentally found thyroid lesions by FDG-PET/CT, especially a focal FDG uptake and a high SUV, have a high risk of thyroid malignancy. Further diagnostic work-up is needed in these cases.
在接受氟代脱氧葡萄糖正电子发射断层扫描/计算机断层扫描(FDG-PET/CT)的患者中,经常会偶然发现甲状腺病变。本研究的目的是调查接受FDG-PET/CT检查的患者中偶然发现甲状腺病变的患病率,并确定甲状腺癌的风险。
2003年11月至2005年12月期间,对3379例患者进行了FDG-PET/CT检查,以评估疑似或已知癌症或进行癌症筛查,这些患者均无甲状腺癌病史。回顾性分析与FDG-PET/CT检查结果相关的病历,包括最大标准摄取值(SUVmax)和FDG摄取模式、超声检查结果、细针穿刺活检(FNA)以及手术获得的组织病理学结果。
285例患者(8.4%)在FDG-PET/CT检查中被发现有FDG摄取。99例有局灶性或弥漫性FDG摄取的患者接受了进一步评估。FDG-PET/CT偶然发现的甲状腺病变的癌症风险为23.2%(22/99),与局灶性和弥漫性FDG摄取相关的癌症风险分别为30.9%和6.4%。良性和恶性结节之间的SUVmax存在显著差异(3.35±1.69 vs. 6.64±4.12;P<0.001)。SUVmax与癌症大小之间存在显著相关性。
本研究结果表明,FDG-PET/CT偶然发现的甲状腺病变,尤其是局灶性FDG摄取和高SUV值,具有较高的甲状腺恶性风险。在这些病例中需要进一步的诊断检查。