A Foregut Duplication Cyst of the Stomach in Association with a Gastrointestinal Stromal Tumor and a Leiomyoma: A Case Report

Figure 2

((a) and (b)) Duplication cyst at low power. The arrows point at the epithelial lining of the cyst, H&E. (c) Pseudostratified ciliated epithelial lining of the duplication cyst at high power. The arrow indicates the presence of cilia, H&E. ((d) and (e)) GIST nodule at low and high power. The tumor cells have spindle shape and mild cytologic atypia, H&E. ((f) and (g)) Immunohistochemistry stains show that the tumor cells are strongly positive for both CD117 (f) and CD34 (g). ((h) and (i)) Leiomyoma at low and high power. The tumor cells have elongated nuclei and abundant cytoplasm, with no cytologic atypia, H&E. ((j) and (k)) Immunohistochemistry stains show that the tumor cells are negative for CD117 (j), while they are strongly positive for SMA (k).