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What tests confirm whether a soft lump is a lipoma or a malignant tumor?

3 months ago

I recently noticed a soft lump under the skin on my arm that doesn’t hurt but has been slowly increasing in size over the past few months. My doctor mentioned it might be a lipoma. How can I be completely sure it’s not something more serious, like a malignant tumor, and what tests are usually done to confirm this?

Asked By Akash | Male | Age 36

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3 months ago

Answers (1)

Dr. Prateek Thakur

M.B.B.S, M.S. (General Surgery), M.Ch. (Plastic Surgery), DrNB (Plastic Surgery) | 16 Years Experience Overall

Answered 30/10/2025

If you have a soft, painless lump under the skin that’s slowly growing, it may be a lipoma, which is usually benign. To be completely sure it’s not something more serious, your doctor may recommend a physical exam, imaging tests like ultrasound or MRI, and sometimes a biopsy or excision for histopathology.

Lipomas are generally harmless, but any lump that grows rapidly, becomes painful, or changes in appearance should be evaluated promptly.

Early consultation prevents surgery in many cases!

Early consultation prevents surgery in many cases!