title: Non-Epstein-Barr virus associated lymphoepithelioma-like carcinoma of the esophagogastric junction with microsatellite instability, K-ras wild type.
abstract: A 60-year-old male was admitted to our hospital for gastric cancer. Considering his general condition, total gastrectomy and dissection of regional lymph nodes were performed. Macroscopically, a 45 mm × 20 mm × 10 mm-sized, ulcero-infiltrative tumor located in the esophagogastric junction was described. Microscopically, the tumor consisted of a poorly differentiated adenocarcinoma intermingled with dense lymphoid infiltration predominantly composed of T-cell lymphocytes. The tumor cells infiltrated the submucosa, muscularis and subserosal layers of the stomach, respectively the esophageal adventitia. No metastases were noticed in the 58 regional lymph nodes. Based on the histopathological features, the diagnosis was lymphoepithelioma-like carcinoma, pT3N0 stage. In situ hybridization for Epstein-Barr virus showed no nuclear signal in tumor cells. The p53 expression was observed in fewer than 10% of the tumor cells. Real-time PCR analysis showed microsatellite instability without K-ras mutation in codon 12. No recurrences or metastases were reported 6 months after surgical intervention. No adjuvant therapy was performed.
authors: Department of Pathology, University of Medicine and Pharmacy, Targu-Mures, Romania. simonagurzu@yahoo.com
authors: Simona
authors: S
authors: Gurzu
authors: Zoltan
authors: Z
authors: Szentirmay
authors: Tivadar
authors: T
authors: Bara
authors: Mihai
authors: M
authors: Turcu
authors: Erika
authors: E
authors: Toth
authors: Tivadar
authors: T
authors: Bara
authors: Ioan
authors: I
authors: Jung
mesh_terms: D000230:Adenocarcinoma / Q000235:genetics* / Q000473:pathology; D004943:Esophagogastric Junction / Q000473:pathology*; D011905:Genes, ras; D004854:Herpesvirus 4, Human; D006801:Humans; D017403:In Situ Hybridization; D008297:Male; D053842:Microsatellite Instability; D008875:Middle Aged; D060888:Real-Time Polymerase Chain Reaction; D013274:Stomach Neoplasms / Q000235:genetics* / Q000473:pathology