Final answer:
True, discovering a growth is malignant means it is cancerous, posing a serious threat since malignant tumors can invade nearby tissues and metastasize.
Step-by-step explanation:
True, it is indeed bad news when a growth is found to be malignant, as this indicates that it is cancerous. Malignant tumors can grow uncontrollably and invade neighboring tissues. Furthermore, cancerous cells from malignant tumors can enter the bloodstream and metastasize, which means they can spread and potentially form new tumors in other parts of the body. These characteristics of malignancy contrast with benign tumors, which remain localized and do not spread, often posing no serious threat to health.