Sentence:  If the tumour be compressed in some, the parts in immediate contact become tense and swollen. For this reason it is the worst kind of disease. It generally commences by what the Greeks call <WSD>Cacoethes</WSD>, or "malignant tumour", then proceeds to carcinoma 
Meaning of the word marked with <WSD> tags:  A bad quality or disposition in a disease; a malignant tumour or ulcer.