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A member asked:

I got a cyst on my back cultured and it said no bacteria growth, but then what is the yellow green pus? is it not from bacteria?

A doctor has provided 1 answer

Sebaceous cyst: It is likely that you had a sebaceous cyst. The fluid you interpret as pus is just accumulated sebaceous gland secretions.

Answered 2/3/2015

3.3k views

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