Round 4 (Closed)
Our challenge continues. What is the incidence of lung cancer in the United States? Can you identify the lung mass in the 73-year-old man who presents with cough and dyspnea? Claim victory in Round 4 and qualify for our ultimate challenge.
Round 5 (Closed)
We ratchet up the pressure, saving our most difficult questions for this ultimate round. Do you have what it takes to be the champion?