Some people may assume that tumors and cyst are the same, but actually, these are two different things. A tumor is known to be made out of tissue that can be a bit hard and may also grow. A tumor can also be benign, which means that it is not cancerous, or it can be malignant, which means that it is cancerous.
A cyst, on the other hand, is known to be a sac of tissue. This can be filled with fluid, or it can be filled with air. There are some cysts and tumors that should be removed immediately so that there is no chance that they would grow while there are also some that can be removed through different means.