| Autor: |
Sugimoto, Ryo, Uesugi, Noriyuki, Yamada, Noriyuki, Osakabe, Mitsumasa, Baba, Shigeaki, Yanagawa, Naoki, Akiyama, Yuji, Habano, Wataru, Sasaki, Akira, Oda, Yoshinao, Sugai, Tamotsu |
| Předmět: |
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| Zdroj: |
Diagnostic Pathology; 2/17/2023, Vol. 18 Issue 1, p1-10, 10p |
| Abstrakt: |
Background: Gastroblastoma is a rare gastric tumor composed of epithelial and spindle cell components. The characteristic MALAT–GLI1 fusion gene has only been identified in 5 reported cases. We report the morphological characterization of gastroblastoma with the MALAT1–GLI1 fusion gene in a young Japanese woman. Case presentation: A 29-year-old Japanese woman visited Iwate Medical University Hospital with upper abdominal pain. Computed tomography revealed a tumor in expansive lesions involving the gastric antrum. Histologically, we observed a biphasic morphology composed of epithelial and spindle cell components. The epithelial components appeared as slit-like glandular structures with tubular or rosette-like differentiation. The spindle cell components consisted of short spindle-shaped oval cells. Immunohistochemical (IHC) analysis revealed that the spindle cell component was positive for vimentin, CD10, CD56, GLI1, and HDAC2, and focally positive for PD-L1. The epithelial component was positive for CK AE1/AE3, CAM5.2, and CK7, and negative for CK20 and EMA. Both components were negative for KIT, CD34, DOG1, SMA, desmin, S100 protein, chromogranin A, synaptophysin, CDX2, and SS18-SSX. The MALAT-GLI1 fusion gene was detected molecularly. Conclusions: We report the following new findings with this case: (i) gastric tumors mimic the gastrointestinal mesenchyme in the embryonic period; (ii) nuclear expression of PD-L1 and HDAC2 were observed in the spindle cell component of a gastroblastoma. We speculate that histone deacetylase (HDAC) inhibitors may offer a promising treatment option for gastroblastoma. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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