A member asked:

What is the difference between a tumor and a cyst?

2 doctors weighed in across 2 answers

Cyst vs tumor: Cyst is a sac that may be filled with air, fluid or other material, enclosed by a capsule. A tumor is an abnormal mass of tissue which could be malignant or benign.

Answered 8/11/2019

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A cyst is filled : With fluid or debris, a tumor is filled with living cells, and a malignant tumor is filled with malignant cells. All look like lumps to start with. Distinguishing is what we call a work up, and can wind up with removal to prove indeed what it is.

Answered 7/2/2015

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