Light and electron microscopic observation of malignant gastric leiomyoblastoma

Figure 1 A stomach mass located at the cardia on the lesser curvature, having 8 cm × 7 cm in volume, projecting into the gastric lumen with a 4 cm ulcer.

Figure 2 Round and polygon-shaped tumor cells interposed with small amount of collagen fibers, with round central nuclei and clear perinuclear zones.

Figure 3 Both clear and dark cells with spindle-shaped nuclei are in apposition, with many pinosomes on the membrane of the clear cells.

Figure 4 Many myofilaments and dense patches within the dark cells.

Figure 5 Abundant organelles within clear cells, i. e. well developed Golgi complex and rough endoplasmic reticulum followed by cystic extension.