Hi im sat here with a worrying large mass at the top/side of my thigh. I noticed it around 6 weeks ago when after i sit on the computer chair the arm would leave a large red line across my thight as it was touching it cause I got large legs which then made me feel the thigh to feel the lump. It started off painless to touch I had no pain walking sleeping ect, But as time as gone on its become VERY painfull. there is 1 spot which is agony to touch, and when I walk or sleep it hurts alot also. I am a 27 yo and I am very scared its a sarcome at this point theres nothing else it can be in my mind. I have had blood test to check for blood clots and they was negative and I had an x ray for somereason on my thigh which was normal. I have an ultrasound Monday at 11:30 which I feel sick with worry with and will get reasults str8 after as i was sent from the hospical yesterday so they are seeing in str8 after to discuss,

My questions are will they be able to see on monday if its a tumour causing the swelling a pain or somthing else.

How usefull is an ultrasound for mass in soft skin tissue. What other things could it be?