I've got stage 4 melanoma. Started as a mole then later found in my lymph nodes snd lung. I've been taking dabrafenibs and trametinibs which is keeping it under control .Recently had my 3 monthly scans and found shadow on left side of brain. Following an mri scan 2 small tumours were found. Within 10 days I received a single "24 grey" srs treatment to them. Im awaiting my follow up scan in 3 months time.. I've been told to notify dvla of this.. do I need to ? What do they need to know? And what do I have to do to get my licence back , I also hold an hgv license ?