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There are many causes of a lump on the collarbone, including swollen lymph nodes ... A 2019 review of 113 cases of bone tumors in the collarbone between 1976 and 2018 found that 60 of the tumors ...
A branchial cleft cyst is a type of birth defect in which a lump develops on one or both sides of your child’s neck or below the collarbone. This type of birth defect is also known as a ...
Feel for a hard or firm or unusual lump from your collar bone, down to your bra line under your breast and up under your arm. The upper-outer quadrant is the #1 spot for breast cancer to develop.