Most cancers are attributed to which of the following?

Bruising behind the ears, which is a delayed sign of a skull fracture, is called:

A. raccoon sign. C. Cushing's sign. B. Battle sign. D. Hof mann's sign.

The death of lung tissue that may result from an obstruction of the pulmonary artery is called a:

a. pulmonary embolism. b. pleural effusion. c. pulmonary infarction. d. pulmonary empyema.