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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes A Hard Lump On The Arm?

I am a 32year old female, I weigh 120lbs. I was seen 4yrs ago because of a discoloration(appeared to be broken blood vessels) they did a biopsy and found it to be nothing. The broken blood vessels went away and I had no problems until a few weeks ago my left arm went numb and when I rubbed it I noticed a hard lump the size of a gumball. It does not really bother me, I gave it a few weeks to see if it would go away...still no change
posted on Fri, 14 Mar 2014
Twitter Tue, 24 Mar 2015 Answered on
Twitter Wed, 25 Mar 2015 Last reviewed on
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Pathologist and Microbiologist,  's  Response
Hi! thanks for your health query on HCM!

Well, you have a significant medical history behind the hard lump on the lump. You had broken vessels that healed itself; you have numb left arm; and the lump appeared after you rubbed the numb area; it does not seem to reduce...
I must consider following possibilities in this case:

1. post traumatic neuroma-like benign nerve tumor

2. inflammatory stromal nodule

3. neurofibroma or schwannoma

4. parasitic cyst

5. aneurysm or vascular malformation

You need a doppler/ultrasound study for confirmation, in addition to a clinical examination; therefore please see your doctor but nothing to worry really!

regards,
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What Causes A Hard Lump On The Arm?

Hi! thanks for your health query on HCM! Well, you have a significant medical history behind the hard lump on the lump. You had broken vessels that healed itself; you have numb left arm; and the lump appeared after you rubbed the numb area; it does not seem to reduce... I must consider following possibilities in this case: 1. post traumatic neuroma-like benign nerve tumor 2. inflammatory stromal nodule 3. neurofibroma or schwannoma 4. parasitic cyst 5. aneurysm or vascular malformation You need a doppler/ultrasound study for confirmation, in addition to a clinical examination; therefore please see your doctor but nothing to worry really! regards,