[Verified Answer]: CASE STUDY: Ms. T., a 65-year-old woman in goo

CASE STUDY: Ms. T., a 65-year-old woman in good health, presents to her family doctor with a chronic cough. She is currently a non-smoker but smoked for 20 years from age 20-40. A chest x-ray shows a small growth in the right lung. A blood test for lung tumor markers is negative and a bronchoscopy is scheduled to biopsy the tumor. The pathology report indicates the lung tumor is a secondary tumor from the small intestine. Ms. T is referred to an oncologist for treatment. What are some factors in her history that could indicate a risk of cancer for Ms. T? What is the significance of a negative test for tumor markers in this case? How did the small intestine tumor cells reach the lungs? What is the probable prognosis for Ms. T?