My sister (who lost her 26 year old son very suddenly last year) has been fast tracked for a consultation due to a suspected soft tissue sarcoma in her upper arm. It's very small (2cm by 2cm) and she first noticed it about 3 months ago. It's also very painful. We are very close and I'm going out of my mind with worry about her. Does anyone have any experience of this? She's been through so much already.