My husband was diagnosed December 2020 after battling rectal cancer since September 2016. Gleason 3+4 which we were told wouldn't need any treatment just Active Surveillance. His recent MRI scan showed there had been a 3mm increase but one area had disappeared. The doctor said there was no cause for concern and there would be a phone appointment in about a month after MDT. Since the appointment my husband has been extremely anxious and very low in mood.  Does anyone have any thoughts on whether we should be worried. 
Unffortunately, because of his previous radiotherapy and surgery his treatment options are very limited should the prostate advance.