My mum has been diagnosed with stage 4 lung cancer which has spread to many lymph nodes, she has a mass of tumours either side of her neck and the cancer is in the top of her spine and her scapula. She was diagnosed in may, her pain from the tumours resting on the nerves has settled with pain killers and the pain at the top of her spine has settled too. Maybe the radio therapy and chemo which has helped or maybe the pain relief is just in the right place . Mum was only given two treatments of chemo with imuno and five days radio and now has only imunotherapy every 6 weeks. Her last treatment was a double dose of imunotherapy and since then she has been struggling a lot with fatigue and I am worried why my mum is stumbling. Could the cancer have spread to the brain is that what happens?   I wondered if anyone else knew of there loved ones stumbling, she doesn't feel dizzy or anything when it happens?