That statement is partially correct, but it's important to be precise with the terminology. Here's why:

* Mutation: A mutation is a permanent alteration in the DNA sequence of a gene. It's the underlying cause of cancer, not the cancer itself.

* Cancer: Cancer develops when a cell with a harmful mutation starts dividing and growing uncontrollably, forming a mass of abnormal cells called a tumor.

Think of it like this:

* Mutation: A typo in the instruction manual for a cell.

* Tumor: The result of the cell following those faulty instructions, creating a mass of abnormal cells.

So, while a mutation can lead to a tumor, it's not the tumor itself. The tumor is the consequence of the mutation.