Figure 2. Histological findings of the biopsy specimen.

(A) Transition between hypocellular myxoid areas (left) and hypercellular areas (right) (hematoxylin and eosin (H&E) staining, objective magnification ×3). Arrows indicate the transition zone between the hypocellular myxoid and hypercellular areas. (B) Hypocellular myxoid area showing spindle-shaped tumor cells embedded in abundant myxoid stroma (H&E, ×10). Arrows indicate representative spindle-shaped tumor cells. (C, D) Hypercellular areas composed of round to oval plasmacytoid tumor cells with eccentrically located nuclei and hyaline globule-like cytoplasm (C: H&E, ×10; D: H&E, ×40).