Sentence:  When authorities convicted him of practicing medicine without a license ( he got off with a suspended sentence of three years because of his advanced age of 77 ) , one of his victims was not around to testify : He was dead of <WSD>cancer</WSD> . 
Meaning of the word marked with <WSD> tags:  any malignant growth or tumor caused by abnormal and uncontrolled cell division; it may spread to other parts of the body through the lymphatic system or the blood stream