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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes Movable Lump Under Arm Pit?

My 4 year old has a small movable (pea sized) lump under her armpit. When I first noticed it about a month ago, her doctor said there was nothing to worry about. It is still here and it feels a little bigger and she now says it is sore. What could this be?
Thu, 24 Dec 2015
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Radiologist 's  Response
Hi
Dont worry.most common cause of movable lump under arm pit is lymphnode, swelling due to hair follicle infection called furuncle. There wil be visible swelling with redness and pain if its due to furucle. It is usually of short duration. I feel it is lymphnode as you are saying of 1 month duration.dont worry most of times lymphnode is inflammed.that may be she complaining.stil in doubt & no visible swelling advised high frequency scan to underlying cause.
Thank you
Vasundhara
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What Causes Movable Lump Under Arm Pit?

Hi Dont worry.most common cause of movable lump under arm pit is lymphnode, swelling due to hair follicle infection called furuncle. There wil be visible swelling with redness and pain if its due to furucle. It is usually of short duration. I feel it is lymphnode as you are saying of 1 month duration.dont worry most of times lymphnode is inflammed.that may be she complaining.stil in doubt & no visible swelling advised high frequency scan to underlying cause. Thank you Vasundhara