CD19-Negative Acute Lymphoblastic Leukemia (ALL): A Case Report and Review of Literature on a Rare Phenomenon De Novo and a Future Induced Struggle in Relapse. - Arrabito, Marta; Cannata, Emanuela; Samperi, Piera; Rosa, Manuela La; Nigro, Luca Lo (International Journal of Molecular Sciences, 2026)