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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes Hard Painless Lump Under Armpit?

Hi,
2 Months ago, I noticed a lump under my right armpit. The lump is hard and painless. 2 Weeks ago, I felt another smaller lumps that seems connected to the bigger one.
The bigger lumps has grown a little in the past 2 months. I guess I should go see a doctor?
Fri, 2 Jan 2015
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Pathologist and Microbiologist 's  Response
Hello and welcome to HCM,
Painless lump under the armpit is most commonly caused by lymph node enlargement.
Development of new lymph node near the bigger swelling can be due to enlargement of another lymph node.
It is suggested to consult your doctor for clinical assessment.
Lymph node enlargement is most commonly caused by infections, inflammation and metastatic tumors.
Is there any associated lump in the chest?
Whatever may the case a clinical assessment is required for further management.
An aspiration cytology of the swelling is required to know the origin and nature of the swelling.
Aspiration cytology is an office procedure wherein a needle is inserted into the swelling, cells are aspirated and spread on a glass slide.
The cells are stained with appropriate stain and studied microscopically.

Thanks and take care
Dr Shailja P Wahal

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What Causes Hard Painless Lump Under Armpit?

Hello and welcome to HCM, Painless lump under the armpit is most commonly caused by lymph node enlargement. Development of new lymph node near the bigger swelling can be due to enlargement of another lymph node. It is suggested to consult your doctor for clinical assessment. Lymph node enlargement is most commonly caused by infections, inflammation and metastatic tumors. Is there any associated lump in the chest? Whatever may the case a clinical assessment is required for further management. An aspiration cytology of the swelling is required to know the origin and nature of the swelling. Aspiration cytology is an office procedure wherein a needle is inserted into the swelling, cells are aspirated and spread on a glass slide. The cells are stained with appropriate stain and studied microscopically. Thanks and take care Dr Shailja P Wahal