Abstract

目的探讨异基因造血干细胞移植(allo-HSCT)患儿造血重建后人类细小病毒B19(HPV-B19)感染的血液学表现。方法对9例allo-HSCT后合并HPV-B19感染的患儿进行回顾性分析。结果9例患儿占同期接受allo-HSCT患儿的8.04%(9/112),男8例,女1例,中位年龄9(3~13)岁,均采取清髓性预处理方案。HPV-B19感染中位时间为移植后61(36~114)d。allo-HSCT并发HPV-B19感染患儿血液学表现具有异质性,9例患儿以血红蛋白伴网织红细胞下降为主要特点,7 d内网织红细胞比例、绝对值下降幅度中位数分别为90.4%(24.7%~98.7%)、90.7%(18.6%~99.0%)。除常见红系造血停滞表现外,allo-HSCT后合并HPV-B19感染的患儿还具有非红系的血象及骨髓变化:5例患儿外周血出现中性粒细胞下降,但骨髓涂片未见粒系增生受抑;6例患儿骨髓涂片查见巨核系增生减低,其中5例患儿外周血血小板下降。同时,allo-HSCT造血重建后合并HPV-B19感染的患儿骨髓红系受抑并非必要表现,9例患儿虽然均出现血红蛋白下降,但仅5例患儿骨髓红系增生减低。结论血液病患儿allo-HSCT造血重建后合并HPV-B19感染的血液学表现具有异质性,血红蛋白伴网织红细胞下降对HPV-B19感染早期诊断可能具有重要意义。

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