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【南昌大学第一附属医院】PET/CT上恶性肿瘤“万能模仿者”之三

  • 2026-03-30 09:10:42
【南昌大学第一附属医院】PET/CT上恶性肿瘤“万能模仿者”之三

源于:南昌大学第一附属医院PET中心2026年3月27日 11:40江西听全文

01

CASE 1

女,64岁,发现淋巴结肿大3月。患者3月前因“右胸背部疱疹后疼痛2月”入我院疼痛科,查CT提示双肺门及纵隔、肝门区及腹膜后多发肿大淋巴结影,淋巴瘤?同时血常规提示三系减少。我院18F-FDG PET/CT示左锁骨上窝、双肺门及纵隔、心膈角区、肝门、腹膜后、肠系膜、脾门多发淋巴结,部分肿大、融合趋势,糖代谢异常增高;双肺多发斑片影,糖代谢增高;脾脏稍增大,糖代谢轻度增高。

02

CASE 2

女,35岁,发现腹膜后肿物2天。患者因腹部不适就诊于外院,腹部CT提示腹膜后腹主动脉旁结节、肿块,考虑为肿大淋巴结可能。我院18F-FDG PET/CT示双侧锁骨上窝、右腋窝、双肺门及纵隔、肝门、腹膜后、髂血管旁、盆壁、腹股沟区多发淋巴结,部分肿大,糖代谢异常增高;双肺条片状稍高密度,糖代谢增高。

03

CASE 3

女,58岁,胸闷气喘1年,再发加重2月。患者自诉于1年前无明显诱因出现胸闷气喘,当时无咳嗽,无胸痛不适,未予以重视及就诊;2月前患者再次出现胸闷气喘,伴咳嗽咳痰、白色粘痰,呼吸困难,偶有咯血,无明显胸痛,无发热,当地医院查胸部CT示右侧肺门增大,纵隔多发肿大淋巴结,两上肺感染性病变。我院18F-FDG PET/CT示双肺门及纵隔多发肿大淋巴结,糖代谢异常增高;脾脏内结节状糖代谢增高;双肺斑片状影,糖代谢增高。双侧甲状腺肿大,糖代谢增高。

04

CASE 4

男,53岁,发现肺部阴影6天。患者于6天前在我院行疝气修补时行胸部CT示:右下肺隔上结节伴纵隔、肺门多发肿大淋巴结,需考虑恶性病变(周围型肺CA并淋巴结转移)可能,请结合临床穿刺分析。我院18F-FDG PET/CT示右肺下叶实性结节,糖代谢异常增高;左锁骨上窝、双肺门及纵隔、腹膜后多发淋巴结,糖代谢增高。

答案

经过活检,病理均证实为肉芽肿性炎,排除感染,考虑结节病

概述

结节病(Sarcoidosis)是一种原因不明的多系统肉芽肿性疾病,以非干酪样坏死性上皮样细胞肉芽肿为病理特征,可累及全身多个器官,但以肺部及胸内淋巴结受累最为常见。病因尚未明确,可能与遗传易感性、环境因素(如感染、粉尘暴露)、免疫系统异常激活等有关。结节病可发生于任何年龄,但多见于20~40岁,女性较多。病程进展缓慢,轻者可无症状。临床症状与影像学表现常不相称,肺部改变明显而临床症状轻微,为本病的特点之一。常见的症状为咳嗽,咳少量黏痰、乏力、低热、盗汗、纳差及胸闷等。其他症状有肝脾肿大、皮肤结节、关节疼痛、腮腺肿大、外周淋巴结肿大及眼部病变症状等。实验室Kveim试验阳性,ACE(血管紧张素转化酶)升高,血、尿钙值升高。

结节病PET/CT影像表现

1淋巴结受累表现

对称性肿大:双侧肺门、纵隔淋巴结常呈对称性肿大,边界清晰,无融合或坏死征象,FDG代谢明显增高,SUVmax通常较高(如15-20以上)。

多区域受累:除肺门和纵隔淋巴结外,可累及颈部、腹膜后、腹股沟等部位淋巴结,表现为多发高代谢肿大淋巴结。

2肺部表现

粟粒样结节:双肺沿支气管血管束、胸膜下或小叶间隔分布多发粟粒样结节,直径多为2-10mmFDG代谢轻度增高(SUVmax2-4),部分结节可融合成较大结节。

间质改变:可伴有肺间质增厚、网格影或磨玻璃影,严重时出现肺纤维化、蜂窝肺等表现。

3胸外器官受累表现

肝脾受累:肝脾可表现为多发高代谢小结节,或弥漫性代谢增高,伴肝脾肿大。

心脏受累:心肌可出现局灶性高代谢病灶,常见于室间隔、心室壁,需注意与正常心肌生理性摄取鉴别。

神经系统受累:脑膜、脊髓神经根等可出现高代谢病灶,表现为脑膜强化、神经根增粗伴代谢增高

   PET/CT表现需结合临床、病理综合判断,因结节病与淋巴瘤、结核等疾病影像学表现有重叠,确诊需依赖组织活检。

PET/CT在结节病的核心价值

1)疗效评估的「实时监测仪」

传统影像学检查(CT/MRI)仅能评估病灶形态学改变,通常需数月才可观察到结构性改善;而 PET/CT可在启动治疗数周内,通过病灶代谢活性(SUV 值)的显著下降,早期、定量预判治疗应答效果,快速甄别无效治疗方案,及时规避长期用药引发的不良反应。

2)隐匿复发的「哨兵预警系统」

针对结节病无症状的亚临床复发,PET/CT 能够先于血清学标志物(血管紧张素转换酶ACE等)检测到病灶异常代谢增高,提前预警隐匿性病情活动,实现早期干预,有效阻断临床症状出现前的病情进展。

3)个体化诊疗的「精准导航地图」

结节病具有多器官受累的典型特征,PET/CT 通过全身显像可精准定位代谢活性最高的靶病灶,为活检取材提供精准导航,大幅降低盲目穿刺的创伤风险与漏诊概率;同时可全面评估全身受累范围与病灶活跃程度,为个体化治疗方案的制定与优化提供核心依据。

PET/CT上恶性肿瘤“万能模仿者”之一

PET/CT上恶性肿瘤“万能模仿者”之二

来源:PET中心

编辑:张德亮

初审:李海军

审核:彭德昌

相关链接:顶级双百强待遇高,招聘核医学人数众,南昌大学第一附属医院2019年招聘高层次人才公告

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  1. CONNECT:[ UseTime:0.000866s ] mysql:host=127.0.0.1;port=3306;dbname=aa460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001467s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000702s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000688s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001413s ]
  6. SELECT * FROM `set` [ RunTime:0.000607s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001381s ]
  8. SELECT * FROM `article` WHERE `id` = 492022 LIMIT 1 [ RunTime:0.002340s ]
  9. UPDATE `article` SET `lasttime` = 1774841079 WHERE `id` = 492022 [ RunTime:0.011161s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.003525s ]
  11. SELECT * FROM `article` WHERE `id` < 492022 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.003728s ]
  12. SELECT * FROM `article` WHERE `id` > 492022 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001101s ]
  13. SELECT * FROM `article` WHERE `id` < 492022 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.015579s ]
  14. SELECT * FROM `article` WHERE `id` < 492022 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.006870s ]
  15. SELECT * FROM `article` WHERE `id` < 492022 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002308s ]
0.240227s