The purpose of this course is to engage the participants in an interactive learning opportunity centered on 23 challenging cases of gynecologic and obstetric neoplasia. Images of each case will be posted on the website prior to the meeting, accompanied by a series of multiple-choice questions. Pre-Registrants will receive instructions on how to access the information on the website. Course participation is limited to 80 individuals so early registration is recommended. At the course, each case will be summarized visually, following which the participants will vote electronically in response to the questions. The answer distribution will be immediately available to the participants to permit self-assessment, followed by a brief discussion of the case and differential diagnosis by the speaker. A syllabus with discussion and references will be distributed at the course. Registrants will also receive a CD of all the cases. This course is designed for academic and practicing pathologists or pathologists in training and provides each attendee an opportunity to compare their diagnostic choices to both the speakers and their peers.