Primary Visceral Ewing Sarcoma (Gastric and Bladder) with KIT Expression: A Report of Two Patients and a Differential Diagnostic Approach

1. Chaachou-Charradi,A.
2. Bagué,S.
3. Medina,C.M.
4. Lavernia,J.
5. Claramunt,R.
6. Guerrero,J.A.L.
7. Navarro,S.
8. Llombart-Bosch,A.
9. Williamson,S.R.
10. Machado,I.