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Hard lump in armpit of my 10 year old daughter

Hello,
My 10 year old daughter has a large lump in her armpit. When we first noticed it, it was about the size of a pencil eraser or smaller. Now it has grown larger than a silver dollar in about 2 months time. It hurts her, but only when she lifts her arm....it doesn't bother her at all if she keeps her arm down. It is very hard and does not move at all....poor thing though she is in pain when I try to move it. I took her to the Dr Tuesday (4-19) and they did X-rays, but when she was gone doing the X-rays the Dr told me, "I didn't want to say this in front of her and I don't want to alarm you but the fact that she has this at 10 years old is not normal at all and it sends red flags up." Dr perscribed an antibiotic and said that if it was a cyst then the lump would get smaller within a few days....she also said we need to do a biopsy. My daughter has been taking the antibiotic since Tuesday, will be done with it on Monday...this is Saturday and it is still the same size. The biopsy is scheduled for May 10th and I am going to go crazy in the meantime waiting for that day. My question is this, if they really thought it was just a cyst why would they have still scheduled the biopsy for so long down the road when the cyst would be gone by then? I am fearing the worst, that this is in fact cancer. I know cancer doesn't usually hurt, but this lump doesn't hurt her except when she lifts her arm, and I think it's because it is right there by the muscle. I need an honest answer for if this is cancer, what next? Please respond asap, I think I am going to lose my mind.
Thank you
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Avatar universal
A related discussion, lump in breast was started.
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A related discussion, lump around breast area of 10 year old was started.
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thank you for the responses. The lump has gotten a little bit bigger....not much, and I can only tell because I feel it every single day....but it has gotten bigger. I called the Dr Monday morning and told them this and they up'ed the biopsy to May 4th. Still a week away, but a week sooner than it was. I am so scared...I realize that it's not breast cancer, but the possibility of lymphoma are great. I am tied up in knots and I know it will do me no good to worry...the outcome will be the same regardless....but I can't help it, this is my baby, and I am finding it hard to even sleep at night. Anyway, if there is a forum for lymphoma can you please direct me to it? I will post an update when we get the results from the biopsy...but the next 7 days are going to be the longest of my life I am sure. Thank you for your time....

Theresa.lissysmom
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Avatar universal
Dear lissysmom:  Lumps under the arm can be several things including infection, benign growths and cancer.  Breast cancer in this age-category is essentially unheard of,  although there are other types of cancer that can occur in childhood.  Without being able to examine your daughter or know what the x-ray showed it is impossible for us to guess what this might be.  Your daughter's physician may be able to give you a better idea of what the possibilities are.

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Avatar universal
Dear Lizzy's mom , I'm no doctor but I would be worried too just like you. Has the doctor said anything about it being a boil , I know boils and cyst can be very painful and sometimes take a while to heal up. But maybe your doctor is just taking no chances and wants to do the biopsy to rule out any real serious problems,then address the problem from there, try not to worrie too much. Good Luck , GardenAngel
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