COMPANION MEETINGS Rodger C. Haggitt Gastrointestinal Pathology Society   Sunday, March 18, 2012 — 1:30 p.m. — Convention Centre Ballroom A/B   Manifestations of Systemic Diseases in the GI Tract   Moderator: Rhonda K. Yantiss, Weill Medical College of Cornell University, New York, NY Click the button above to add this event to your Itinerary Planner... 1:30 Drug—Induced Injury of the GI Tract - David A. Owen, Vancouver General Hospital, Vancouver, BC, Canada 2:00 Infections in the Immunocompromised Host - Laura W. Lamps, University of Arkansas Medical Center, Little Rock, AR 2:30 Immunodeficiency Syndromes that Mimic Primary GI Disorders - Susan Abraham, MD Anderson Cancer Center, Houston, TX 3:00 Break 3:30 Gastrointestinal Manifestations of Systemic Vasculitis - John Hart, University of Chicago Hospitals, Chicago, IL 4:00 Rodger C. Haggitt Memorial Lecture: Cutaneous Manifestations of Gastrointestinal Diseases or ... Gastrointestinal Manifestations of Cutaneous Diseases - Bruce Smoller, USCAP Members of the Rodger C. Haggitt Gastrointestinal Pathology Society Education Committee selected the topic in order to address growing concerns in the field of surgical pathology. A trend toward subspecialization among pathologists has led to a dangerous narrowing of scope with respect to the recognition and classification of diseases, particularly when systemic disorders are unexpectedly encountered in the gastrointestinal tract, or observed in the absence of adequate clinical history. For example, several types of medication and infection can cause serious gastrointestinal injury, some of which produce characteristic histologic changes. Systemic immunodeficiencies and immune-mediated illnesses also produce gastrointestinal symptoms that may represent the earliest manifestation of disease. The purpose of this session is to discuss important entities that cause generalized illness, yet have gastrointestinal manifestations that prompt mucosal biopsy analysis. Topics to be discussed include drug-induced mucosal injury and opportunistic infections, immunodeficiency syndromes that simulate primary gastrointestinal disorders, and immune-mediated diseases, such as vasculitidies and cutaneous diseases, that simulate primary disorders of the gastrointestinal tract.