case_images: PMC11730670_01
case_images: (A) Tumor cells are located under the gastric mucosa with clear boundaries (40x); (B) Tumor cells are densely arranged in bundles or swirls (100x); (C) Areas with sparse tumor cells showed interstitial hyaline degeneration (100x); (D) Tumor cells showed mild morphology with an oval nucleus and occasionally visible small nucleoli (200x); (E)Tumor cells arranged in a flowing water pattern with interstitial hyaline degeneration. Mototic figures are rare (200x); (F) Scattered multinucleated giant cells are observed in the interstitial hyaline degeneration (200x).
case_images: medi-104-e41096-g001.jpg
case_images: PMC11730670_01_medi-104-e41096-g001.jpg
case_images: F1
case_images: Microscopically, tumor cells were located under the gastric mucosa with a clear boundary (Fig. 1A). In other areas, the tumor cells were sparsely arranged and accompanied by significant interstitial hyaline degeneration (Fig. 1B, C). Under higher magnification, tumor cells exhibited indistinct borders, consistent sizes, a mild morphology, an oval nuclei, and an occasional small nucleoli (Fig. 1D, E). In some areas, hyaline degeneration of the interstitium could be found in the tumor tissue, with multinucleated tumor giant cells scattered among the hyalinized collagen fibers (Fig. 1F).
case_images: (A) Vimentin showed positive expression (100x); (B) Bcl-2 showed positive expression (C) CD117 showed negative expression (100x); (D) Dog-1 showed negative expression (100x); (100x); (E) CD99 showed positive expression (100x); (F) STAT-6 showed positive expression (100x); (G) CD34 showed positive expression (100x); (H) The Ki-67 proliferation index is approximately 2% (100x).
case_images: medi-104-e41096-g002.jpg
case_images: PMC11730670_01_medi-104-e41096-g002.jpg
case_images: F2
case_images: The Ki-67 proliferation index was approximately 2% (Fig. 2).