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A 16-year-old female asked:

Pea sized hard lump on rib at the side of my breast under my armpit, moves with the rib when i move arm up and down or when i twist what could it be?

1 doctor answer2 doctors weighed in
Dr. Diane Minich
Family Medicine 38 years experience
See your doctor: A doctor would need to examine you to try to determine what the lump is.
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Last updated Jul 11, 2015

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