A 62-year-old man presenting with shortness of breath for 6 months.

EDUCATIONAL OBJECTIVES The Clinical Case of the Month is a regular educational feature presented by the Louisiana State University Department of Medicine in New Orleans. Medical students, residents, postdoctoral fellows, and faculty collaborate in the preparation of these discussions. After reading this article, physicians should be able to better identify and understand the prevention, pathophysiology, microbiology, clinical presentation, diagnosis, and treatment of colorectal carcinoma. CREDIT The LSMS Educational and Research Foundation designates this educational activity for a maximum of 1 category 1 credits toward the AMA Physician’s Recognition Award. Each physician should claim only those hours of credit that he/she actually spent in the educational activity.