Primary Cervical Extraosseous Ewing’s Sarcoma Originated from the Sternocleidomastoid Muscle: A Case Report and Review of the Literature

Figure 3

Microscopic appearance of the samples. Hematoxylin & eosin (a). Cell cytoplasm showed dot-like positive staining for CK (b). Ki-67 stained 90% of tumor cells (c). Magnification ×40.

(a)

(b)

(c)