HISTOLOGICAL VERIFICATION OF POSITIVE POSITRON EMISSION TOMOGRAPHY FINDINGS DURING THE FOLLOW‐UP OF PATIENTS WITH MEDIASTINAL LYMPHOMA: LARGE EXPERIENCE ON 96 PATIENTS. (June 2017) - Quirini, F.; Forti Parri, S.; Tonialini, L.; Stefoni, V.; Broccoli, A.; Pellegrini, C.; Marangon, M.; Bonfanti, B.; Argnani, L.; Zinzani, P.