Fig. 4

Hematoxylin and eosin staining. No atypical cells or necrosis was observed. A (magnification ×40): Adipose cells and slight vascular hyperplasia. B (magnification ×40): Constituting the cyst with myxomatous change edematous liquefaction. C (magnification ×100): Spindle-shaped tumor cells were transferred from the blood vessel to the interstitial tissue. D (magnification ×100), E (magnification ×200): Vessel walls, which were small- to medium-sized, showed hyalinization