A Patient Who Was a Long-Time Heavy Smoker Was Seen

Multiple Choice

A patient who was a long-time heavy smoker was seen by a physician for a persistent cough. A biopsy of the bronchial lining displayed a change in the epithelium from pseudostratified ciliated columnar to stratified squamous. The patient decided to quit smoking, and a second biopsy 6 months later showed that a reversal had occurred in the epithelium; it was back to the normal pseudostratified ciliated columnar. This patient had

A) carcinoma
B) adenocarcinoma
C) squamous metaplasia
D) bronchitis
E) pneumonia