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AI辅助诊断实战:面对全血细胞减少,如何揪出罕见的白血病?

AI辅助诊断实战:面对全血细胞减少,如何揪出罕见的白血病?
*仅供医学专业人士阅读参考

撰文 | 孙萍萍 金宁

单位:上海市东方医院(同济大学附属东方医院)南院检验科

血细胞形态学检查是诊断多种血液系统疾病的关键依据,在白血病、淋巴瘤等恶性血液病的初筛与确诊环节尤为重要。人工显微镜镜检长期作为外周血涂片检查的金标准,但该方法操作流程繁琐、高度依赖检验人员专业经验,诊断结果易受主观因素干扰;同时细胞图像难以标准化留存、溯源复查,在大批量筛查及基层医疗机构推广使用中存在明显局限性。

近年来,AI血涂片扫描与形态学辅助识别技术发展迅速,现已在部分医院落地应用,可完成细胞自动定位、分类及计数。但现阶段AI用于罕见血液病诊断的临床病例报道偏少,其临床应用价值与可靠性仍需更多临床实践验证。浆细胞白血病(PCL)属于罕见、高侵袭性浆细胞恶性肿瘤,早期诊断困难、预后极差。本文结合1例依靠AI阅片系统辅助确诊原发性PCL的临床病例,探究AI技术在血细胞形态学检验与罕见血液病诊断中的应用价值,为该项技术临床推广提供参考依据。

案例经过

【患者资料】患者男性,77岁,20余年高血压病史。2025年2月因反复晕厥2次于外院就诊,确诊冠心病并行双腔永久起搏器植入术,外院血常规提示全血细胞减少。2025年3月,患者因贫血伴纳差、乏力、便秘1个月至我院就诊,病程中无发热、腹痛、出血、胸闷等不适。查体:体温36.8℃,血压115/66mmHg,心率78 次/分,神志清,皮肤巩膜无黄染,心肺听诊未见异常,肝脾及浅表淋巴结未触及肿大。既往否认慢性肾脏病、慢性支气管炎等慢性病史,否认乙型病毒性肝炎、结核等传染病史。

【辅助检查】

1、血常规检查结果显示:白细胞计数7.6×109/L,,红细胞计数1.44×1012/L ,血红蛋白测定48.0g/L,血小板计数19×109/L,异常细胞百分比33%。备注形态描述:白细胞手工分类,外周血可见浆细胞约占33%,偶见双核、畸形核浆细胞。

图1 Mindray 6800 PLUS血细胞分析散点图

2、AI阅片检测:血细胞分析仪提示高荧光细胞占15%,触发涂片复检规则。采用迈瑞SC‑120自动推片机制备血涂片,经瑞氏-吉姆萨染色后,使用迈瑞MC‑80血细胞形态图像分析仪扫描检测。仪器依次完成低倍镜定位、高倍镜视野采集、油镜(100倍物镜)扫描,自动抓取分割200个有核细胞;AI算法识别异常浆细胞占33%,与人工分类结果完全吻合,可清晰检出双核、核畸形等异常形态浆细胞。

图2 Mindray MC-80阅片仪形态学分析图

3、生化及免疫学检查:免疫固定电泳IgG、λ型游离轻链阳性;血清游离λ轻链 4690mg/L(参考值6.7~22.4mg/L),显著升高,游离κ轻链26.1mg/L(参考值8.3~27.0mg/L),κ/λ比值0.044、比值倒置;IgG 43.15g/L升高,IgA、IgM水平减低,符合单克隆免疫球蛋白增殖性疾病实验室特点。

图3 免疫固定电泳图

(G代表免疫球蛋白G;A代表免疫球蛋白A;M代表免疫球蛋白M;K代表免疫球蛋白κ轻链;L代表免疫球蛋白λ轻链)

4、骨髓细胞学检查:粒系、红系造血增生减低,巨核系增生重度低下,成熟红细胞呈缗钱状排列;骨髓浆细胞占34.5%,外周血浆细胞28%,可见双核、核畸形浆细胞,骨髓象改变符合PCL形态学特点。

图4 骨髓中浆细胞 (瑞氏-吉姆萨染色,×1000)

图5 外周血片中浆细胞  (瑞氏-吉姆萨染色,×1000)

案例分析

1、PCL诊断与鉴别诊断

PCL为罕见高侵袭性浆细胞恶性肿瘤,分为原发性、继发性2型,仅占全部浆细胞疾病的1%~2%;临床以贫血、血小板减少、肾功能损害、骨骼疼痛为主要表现,整体预后极差,其中原发性PCL中位生存期约11.2个月,继发性PCL仅1~2个月。参照WHO(2020)诊断标准:原发性PCL要求外周血浆细胞≥20%(或绝对值≥2×10⁹/L),既往无多发性骨髓瘤(MM)病史;继发性PCL 继发于MM进展,外周血浆细胞≥20%。本例患者外周血浆细胞33%,无骨髓瘤既往史,合并IgG-λ型单克隆免疫球蛋白升高、游离轻链比值倒置,满足原发性PCL确诊条件。

本病例可排除反应性浆细胞增多症:该病多继发于感染、自身免疫性疾病,外周血浆细胞比例多<10%,无浆细胞畸形改变,亦不存在单克隆免疫球蛋白异常升高。

2、传统人工镜检的局限性

人工显微镜镜检是血细胞形态诊断金标准,但在 PCL 等罕见血液病诊断中存在显著短板:①主观差异性大,不同检验人员对双核、畸形核等异型浆细胞判读一致性偏低,Kappa值仅0.6~0.7;②漏诊风险偏高,异常细胞占比10%~30%的标本漏诊率可达12%~18%,基层检验人员经验欠缺时漏诊风险进一步升高;③检测效率偏低,大批量阅片易因视觉疲劳造成结果偏差,细胞图像不能数字化存档,不利于病例复盘及多中心会诊。本例浆细胞形态存在异型改变,单用人工镜检易出现误判,AI阅片可有效规避人为主观误差。

3、AI 阅片系统的应用优势

AI依托海量血细胞图像深度学习模型,实现异常细胞自动识别、分类计数,有效优化血细胞形态检验质量。本研究中MC‑80 AI阅片系统优势体现在三方面:①精准预警复检:血细胞分析仪提示高荧光细胞占比15%,自动触发涂片复检规则,杜绝高危标本漏检;②成像标准化:100倍油镜采集≥16万像素高清图像,完整呈现异型浆细胞细微形态;③计数客观高效:自动检出异常浆细胞占比33%,结果与人工分类、骨髓细胞学检测高度吻合,图像可长期存档、随时溯源。现有文献数据表明:AI辅助细胞形态检测灵敏度可达96.5%,较人工镜检提升14.2%,检测效率提升5倍;基层医疗机构疾病诊断符合率由 56.3%提升至94.8%,为PCL等罕见血液病早期筛查提供新思路。

4、AI 技术的局限性

AI阅片不能完全替代人工镜检,临床应用仍存在短板:①标本依赖性强,涂片染色质量差、细胞堆叠重叠时,仪器识别准确率明显下降;②对多核浆细胞等极少见异型细胞,仪器识别后仍需人工复核;③无法单独作为 PCL 确诊依据,疾病最终确诊必须结合骨髓形态、免疫分型、细胞遗传学等多项结果综合判定。

总结

本例为迈瑞MC-80 AI阅片系统辅助诊断原发性PCL的临床实践病例,证实AI技术可高效、精准筛查外周血异常浆细胞,有效弥补传统人工镜检主观性较强、易漏诊、效率低下等弊端,显著提升血细胞形态学检验结果的准确性与一致性,为罕见血液病的早期诊断提供了新型有效手段。

AI阅片系统尤其适用于批量样本筛查及基层医疗机构的临床应用,可显著降低罕见血液病的漏诊率。未来可进一步优化AI算法、扩充罕见血液病细胞训练数据集,联合流式细胞术、多组学技术构建多维度联合诊断模型,持续提升AI在浆细胞疾病及其他罕见血液病中的临床诊断效能,推动血细胞形态学检验向智能化、标准化、高效化方向发展。

参考文献:

[1]王鸿利,周洪华。外周血涂片形态学检查的临床价值与质量控制[J].中华检验医学杂志,2020,43(8):801-805.

[2]中华医学会检验医学分会。血细胞分析复检专家共识(2023版)[J].中华检验医学杂志,2023,46(2):113-120.

[3]中国医师协会血液科医师分会,中华医学会血液学分会。浆细胞白血病诊断与治疗中国专家共识(2023年版)[J].中华血液学杂志,2023,44(5):361-366.

[4]陈云明。人工智能辅助细胞学检验在临床病理诊断中的应用效果研究[J].中国医疗设备,2025,40(2):121-124.

[5]赵卫国,陈丽梅。数字化细胞形态学在血液疾病诊断中的应用进展[J].检验医学,2021,36(9):973-977.

[6]KyleRA,RajkumarSV.Plasmacellleukemia:2021updateondiagnosis,risk-stratification,andmanagement[J].AmJHematol,2021,96(11):1467-1480.

本文来源:检验医学网

责任编辑:碧瑶

*"医学界"力求所发表内容专业、可靠,但不对内容的准确性做出承诺;请相关各方在采用或以此作为决策依据时另行核查。

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  1. CONNECT:[ UseTime:0.000535s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000979s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000340s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000306s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000495s ]
  6. SELECT * FROM `set` [ RunTime:0.000200s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000685s ]
  8. SELECT * FROM `article` WHERE `id` = 810385 LIMIT 1 [ RunTime:0.000463s ]
  9. UPDATE `article` SET `lasttime` = 1782561560 WHERE `id` = 810385 [ RunTime:0.024188s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000306s ]
  11. SELECT * FROM `article` WHERE `id` < 810385 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000611s ]
  12. SELECT * FROM `article` WHERE `id` > 810385 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001193s ]
  13. SELECT * FROM `article` WHERE `id` < 810385 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001840s ]
  14. SELECT * FROM `article` WHERE `id` < 810385 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.012150s ]
  15. SELECT * FROM `article` WHERE `id` < 810385 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001899s ]
0.127015s