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Dr. Andrew Rynne
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Dr. Andrew Rynne

Family Physician

Exp 50 years

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Bump On Shoulder, Small Black Dot, Continuous Pus Discharge. Treatment Options?

I have a bump on my shoulder that has been there for about 4 months now. It didn t get bigger than an eraser, and always had a very small black dot. I finally messed with it and started squeezing puss out of it, and there was a good 12 inches of puss. That was about a month ago. Last night, I messed with it again, and got another 4 inches or so of puss. What is it?
Mon, 5 Nov 2012
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Pathologist and Microbiologist,  's  Response
Hello and welcome to HCM
You have mentioned that there is a bump on a shoulder with a black dot in the centre.
On the basis of description this lesion appears to a lesion known as 'sebaceous cyst'
This type of cyst is formed by blockage of opening of sebaceous gland.
The cyst is filled with a substance known as keratin.
The pus like material which is expressing out is keratin.

Treatment of sebaceous cyst is surgical removal.
After removal the cyst should be sent for histopathological examination.

I hope my answer is of help to you.
Thanks and take care
Dr Shailja P Wahal
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Bump On Shoulder, Small Black Dot, Continuous Pus Discharge. Treatment Options?

Hello and welcome to HCM You have mentioned that there is a bump on a shoulder with a black dot in the centre. On the basis of description this lesion appears to a lesion known as sebaceous cyst This type of cyst is formed by blockage of opening of sebaceous gland. The cyst is filled with a substance known as keratin. The pus like material which is expressing out is keratin. Treatment of sebaceous cyst is surgical removal. After removal the cyst should be sent for histopathological examination. I hope my answer is of help to you. Thanks and take care Dr Shailja P Wahal