Abstract
On gross examination, the resected stomach showed two separate lesions of a slightly depressed EGC IIb lesion (1.1 × 1.1 × 0.7 cm) in the angle along the less curvature side and a shallow ulcerative lesion EGC type IIc (3 × 2 × 0.3 cm) in the posterior wall of high body [Figure 1]a and [Figure 1]b.{Figure 1} Histologically, the first tumor consisted of two components [Figure 2]a and [Figure 2]b. One component was GCLS accounting for 85% of the total neoplasm and extended up to the deep submucosa (SM3). [...]the two tumors originated from a multipotential precursor cell able to differentiate along the lines of EBV-associated adenocarcinoma and the other demonstrated squamous differentiation. [...]squamous metaplasia or squamous differentiation occurred in a pre-existing GCLS.
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Details
1 Department of Surgery, University of Ulsan College of Medicine, Gangneung Asan Hospital, Gangneung
2 Department of Pathology, University of Ulsan College of Medicine, Gangneung Asan Hospital, Gangneung