两个家族腺多重症病例的比较,具有相同的APC基因型和不同的表型
Eva Spier1, Aashna Pandya1, Miranda Di Biase2
1Albert Einstein College of Medicine, Bronx, NY, USA.
Cancer genetics
|November 8, 2024
概括
家庭腺瘤多重症 (FAP) 表现出可变的表达性,即使具有相同的APC基因变异. 本案例研究显示了两名患有相同病原性APC变异但临床表现不同的患者,突出显示了个性化FAP管理的必要性.
科学领域:
- 遗传学 遗传学 是一个
- 在瘤学瘤学.
- 胃肠病学 胃肠病学
背景情况:
- 家族性腺瘤多重症 (FAP) 是一种由APC基因变异引起的遗传性结肠直肠癌 (CRC) 综合征.
- FAP呈现为经典的 (≥100个息肉) 或减弱的 (<100个息肉) 形式,具有潜在的结肠外表现.
- 已知基因型-表型相关性,但可变表达性使结果预测复杂化.
研究的目的:
- 报告一项针对两名患有相同病原性APC变种的患者的案例研究.
- 为了说明FAP的可变临床表现和结果,尽管有遗传相似性.
- 强调个性化管理的重要性,并进一步研究FAP表现力.
主要方法:
- 两名被诊断患有FAP的患者的病例报告.
- 基因分析确定了一个共享的病原性APC变体 [c.4348C>T,p.Arg1450Ter].
- 收集关于表现,家族病史和疾病过程的临床数据.
主要成果:
- 这两名患者都携带了相同的病原性APC变种.
- 患者1:在4岁时被诊断出来,有广泛的家族病史.
- 患者2:在经过desmoid瘤呈现后被诊断为晚期,没有家族病史.
- 在两名患者之间观察到临床表现和病程的显著差异.
结论:
- 同样的APC致病变体可以导致截然不同的FAP表型.
- 仅仅基因型不足以预测FAP的临床结果.
- 对FAP患者来说,个性化监测和管理至关重要.
- 需要进一步的研究来了解影响FAP变量表达力的因素.
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