Conservative Treatment of Ewing’s Sarcoma of the Uterus in Young Women

Figure 3

Poorly differentiated malignant neoplasm at histology: large cells, with scanty cytoplasm, hyperchromatic nuclei (a), uncohesive, diffusely dispersed, and occasionally disposed in tubular structures (c). The tumor shows being mostly necrotic with vital cells clasped around vessels (b). Immune-staining revealing a positive reaction for vimentin (+++) and CD99 (+++) (d). Proliferative index Ki67 is approximately 90%.

(a)

(b)

(c)

(d)