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高度结肠直肠腺癌与SMAD4缺乏
Yasamin Mirzabeigi1, Nikunj Shah1, Kayla R Schwartz2
1Department of Pathology and Laboratory Medicine, University of Miami Miller School of Medicine, Miami, FL, USA.
概括
患有SMAD4缺陷 (dSMAD4) 高度形态的结直肠腺癌 (CRC) 的患者预后不佳. 这些瘤迅速转移,但CDX2或SATB2免疫标记有助于诊断.
科学领域:
- 在瘤学瘤学.
- 胃肠病学 胃肠病学
- 病理学 病理学 病理学
背景情况:
- 缺少SMAD4 (dSMAD4) 的结直肠腺癌 (CRC) 与预后不佳有关.
- 独特的瘤形态或晚期疾病特征可能会使dSMAD4 CRC患者的结果分层.
- 在晚期疾病中需要重新评估dSMAD4CRCs.
研究的目的:
- 为了研究是否独特的瘤形态分层预后在一个均的队列的先进阶段dSMAD4CRCs.
- 为了比较dSMAD4和SMAD4熟练的 (pSMAD4) CRCs之间的临床病理特征和结果.
主要方法:
- 利用下一代测序 (NGS) 来识别50个dSMAD4 CRC和50个pSMAD4 CRC.
- 在不同群体之间比较人口统计,临床病理参数和遗传驱动因素.
- 分析了组织形态学,转移性模式,总生存率 (OS) 和无进展生存率 (PFS).
- 使用免疫组织化学 (CDX2,SATB2) 进行诊断.
主要成果:
- 无论是dSMAD4还是pSMAD4的CRC都在高率 (90%对86%) 进展到AJCC第四期转移性疾病.
- dSMAD4 CRCs显示了高度 (HG) 粘膜和非粘膜组织形态的丰富 (44%对12%;p=0.0007).
- 在dSMAD4CRCs的HG子组中,转移性疾病呈现广泛 (p=0.0048) 和显著较短的OS和PFS (p≤0.0001).
- 在HG dSMAD4 CRCs中发现了未知的初级转移.
- 所有dSMAD4 CRC都保留了CDX2或SATB2免疫标记,有助于诊断.
结论:
- 确定了一类低估的HG dSMAD4 CRCs,其进展迅速到广泛转移的疾病和不佳的预后.
- 在dSMAD4CRC中,HG形态会导致不良结果.
- 对于dSMAD4CRCs,CDX2/SATB2的免疫组织化学仍然在诊断上有用,即使在HG变体中,也能将其与其他HGCRC区分开来.
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