| 金鑫,黄文平,沈杰,张伟,李德龙,俞同福.胸腺原发不典型类癌影像学表现[J].中国医学影像技术,2023,39(8):1206~1209 |
| 胸腺原发不典型类癌影像学表现 |
| Imaging manifestations of primary thymic atypical carcinoid |
| 投稿时间：2023-03-27 修订日期：2023-05-22 |
| DOI：10.13929/j.issn.1003-3289.2023.08.019 |
| 中文关键词: 胸腺肿瘤 诊断显像 类癌 |
| 英文关键词:thymus neoplasms diagnostic imaging carcinoid tumor |
| 基金项目:2021年承德市科学技术研究与发展计划项目(202109A054)。 |
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| 中文摘要: |
| 目的 观察胸腺原发不典型类癌(pTAC)的影像学表现。方法 回顾性分析经病理证实的8例pTAC胸部CT和MRI资料,观察其影像学表现。结果 8例pTAC 均为前纵隔单发病灶,5个位于偏右、3个偏左,最大径3.5~16.0 cm、中位最大径8.3 cm;7个呈团块状、1个呈分叶状,边界均清晰;CT均表现为不均匀软组织密度影,内见囊变和坏死,2个内见钙化;MR T1WI均呈等信号,T2WI均呈高信号,弥散加权成像见弥散受限,表观弥散系数(ADC)0.23×10-3~1.12×10-3 mm2/s,中位ADC为0.64×10-3 mm2/s;增强后7个病灶不均匀中度强化、1个不均匀轻度强化;4个见瘤内血管。8例中,3例胸腔积液、3例心包积液,5例纵隔淋巴结转移合并或不合并颈部、锁骨上淋巴结转移,4例胸膜转移,4例骨转移(累及邻近肋骨及颈、胸椎),1例肝转移。结论 pTAC影像学表现具有一定特征性,有助于诊断及鉴别诊断。 |
| 英文摘要: |
| Objective To observe imaging manifestations of primary thymic atypical carcinoid (pTAC). Methods Chest CT and MRI data of 8 patients with pTAC confirmed pathologically were retrospectively analyzed, and imaging manifestations of pTAC were observed. Results pTAC present as single anterior mediastinum lesion in all 8 cases, 5 located on the right side and 3 on the left side of anterior mediastinum, with the maximum diameter of 3.5 to 16.0 cm and a median maximum diameter of 8.3 cm, 7 were clump-shaped and 1 was lobed, all with clear boundaries. CT showed uneven soft tissue densities with cystic areas and necrosis, and calcifications were noticed in 2 lesions. The lesions showed iso-signals on T1WI and high signals on T2WI, with restricted diffusion on diffusion weighted imaging, the apparent diffusion coefficient (ADC) ranged from 0.23×10-3 to 1.12×10-3 mm2/s, with a median ADC of 0.64×10-3 mm2/s. On enhanced CT and MRI, moderate uneven enhancement was found in 7 lesions, while mild uneven enhancement was observed in one lesion, 4 with intratumoral vessels. Among 8 cases, pleural effusion and pericardial effusion were detected each in 3 cases, lymph node metastases of mediastinum with or without neck, supraclavicular areas were found in 5 cases, while pleural metastases and bone metastases (involving adjacent ribs, cervical and thoracic vertebrae) were noticed each in 4 cases, and liver metastases was detected in 1 case. Conclusion Imaging manifestations of pTAC had certain characteristic, being helpful to diagnosis and differential diagnosis. |
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