My 15 Yr Old Son Has Been Diagnosed Last Week

my 15 yr old son has been diagnosed last week with juvenile nasal augiofibroma. after being cautorised few backs for heavy bleeding. an MRI and CT scan showed this and now he needs an operation. been told everything is fine and will be fine to fly on our holiday to ,Majorca which we booked a while ago. however he has been fine until few days ago when bleeding has started, now we fly out in 2 days time. is he still ok to fly