My DH was diagnosed with throat and neck cancer 9 years ago, just as we'd begun early retirement. We were both equally shocked and terrified, but the NHS were brilliant and they just seemed to put scans, appointments etc into action immediately. Our consultant was brilliant. Dh had an operation where the cancer in his throat was lasered and the tumour in his neck was cut away. He also had a trachioscopy to help with breathing. We had wonderful support when we came home and follow up checks. 5 years later, DH was signed off from the hospital. As a bonus, the surgeon [consultant] had also lasered off whatever it was that was causing DH to snore - he'd had sleep apnea and had been using a machine to help with breathing at night.
There were ups and downs and some additional scares on the way, but so much love and support from everyone to help us through. Sending every best wish to your friend 