PMID- 32892552 OWN - NLM STAT- MEDLINE DCOM- 20200917 LR - 20200917 IS - 0529-5807 (Print) IS - 0529-5807 (Linking) VI - 49 IP - 9 DP - 2020 Sep 8 TI - [Gastric adenocarcinoma with enteroblastic differentiation and elevated serum alpha fetoprotein]. PG - 886-890 LID - 10.3760/cma.j.cn112151-20191210-00791 [doi] AB - Objective: To study the proportion and clinicopathological characteristics of gastric adenocarcinoma with enteroblastic differentiation (GAED) in gastric cancers showing an elevated serum alpha fetoprotein(AFP). Methods: A total of 724 resected gastric adenocarcinomas were collected from 2008 to 2018 at the 904 Hospital of Joint Service Support Force, and cases with pre-operative serum AFP>10 mug/L were screened. From the cases with elevated serum AFP, GAED cases were further evaluated based on morphology. Then the clincopathological features and immunohistochemical phenotypes of GAED were reviewed. In addition, the amplification of HER2 gene was detected with fluorescence in situ hybridization(FISH). When overall survival (OS) and progression-free survival (PFS) of GAED were analyzed, 289 cases ordinary gastric adenocarcinoma with normal serum AFP were employed as a control. Results: The percentage of GAED was 44% (11/25) in gastric cancers with elevated serum AFP. GAED was histologically tubular or papillary with clear cytoplasm, and some GAED cases showed cystadenoid structure similar to embryo sac (5 cases), homogeneous eosinophilic granules (4 cases) and intragland ulareosinophilic material (6 cases). All 11 GAED cases had lymph node metastasis. Liver metastasis and vascular thrombus were observed in 2 cases and 5 cases respectively. GAED was immunohistochemically positive for CDX2 (11/11), CD10 (8/11) and MUC2(3/11), which were intestinal epithelium differentiation markers. Meanwhile, primitive markers SALL4 (8/11), GPC3 (7/11) and AFP (5/11) were also expressed in GAED, and HER2 gene amplification was found in 3 cases (3/11) of GAED. Lastly, the PFS of GAED were significantly shorter than that of the control group (P=0.02), while OS was not statistically different between these two groups (P=0.99). Conclusions: Patients with GAED usually have a higher rate of elevated serum AFP in gastric adenocarcinoma, and the cancer exhibites features of both intestinal and primitive differentiation. As GAED is highly invasive, the prognosis of GAED may be poor. For GAED, the diagnosis of well-differentiated or moderately-differentiated adenocarcinoma should be avoided, because this diagnosis leads to underestimated malignant potential. FAU - Li, Q Z AU - Li QZ AD - Department of Pathology, the 904 Hospital of Joint Service Support Force, PLA, Jiangsu Province, Wuxi 214044, China. FAU - Zhao, H B AU - Zhao HB AD - Department of Pathology, the 904 Hospital of Joint Service Support Force, PLA, Jiangsu Province, Wuxi 214044, China. FAU - Ban, N AU - Ban N AD - Department of Pathology, the 904 Hospital of Joint Service Support Force, PLA, Jiangsu Province, Wuxi 214044, China. FAU - Wang, Q AU - Wang Q AD - Department of Pathology, the 904 Hospital of Joint Service Support Force, PLA, Jiangsu Province, Wuxi 214044, China. FAU - Zhang, J J AU - Zhang JJ AD - Department of Pathology, the 904 Hospital of Joint Service Support Force, PLA, Jiangsu Province, Wuxi 214044, China. FAU - Ding, S N AU - Ding SN AD - Department of Pathology, the 904 Hospital of Joint Service Support Force, PLA, Jiangsu Province, Wuxi 214044, China. FAU - Li, H H AU - Li HH AD - Department of Pathology, the 904 Hospital of Joint Service Support Force, PLA, Jiangsu Province, Wuxi 214044, China. FAU - Zhou, Z H AU - Zhou ZH AD - Department of Pathology, the 904 Hospital of Joint Service Support Force, PLA, Jiangsu Province, Wuxi 214044, China. LA - chi PT - Journal Article PL - China TA - Zhonghua Bing Li Xue Za Zhi JT - Zhonghua bing li xue za zhi = Chinese journal of pathology JID - 0005331 RN - 0 (Biomarkers, Tumor) RN - 0 (alpha-Fetoproteins) SB - IM MH - *Adenocarcinoma MH - Biomarkers, Tumor MH - Humans MH - Immunohistochemistry MH - In Situ Hybridization, Fluorescence MH - *Stomach Neoplasms MH - alpha-Fetoproteins OTO - NOTNLM OT - Enteroblastic differentiation OT - Prognosis OT - Stomach neoplasms OT - alpha-Fetoproteins EDAT- 2020/09/08 06:00 MHDA- 2020/09/18 06:00 CRDT- 2020/09/07 02:36 PHST- 2020/09/07 02:36 [entrez] PHST- 2020/09/08 06:00 [pubmed] PHST- 2020/09/18 06:00 [medline] AID - 10.3760/cma.j.cn112151-20191210-00791 [doi] PST - ppublish SO - Zhonghua Bing Li Xue Za Zhi. 2020 Sep 8;49(9):886-890. doi: 10.3760/cma.j.cn112151-20191210-00791.