Large asymptomatic hydropneumothorax after thoracentesis.

The interventional radiology Case Corner Series is a new feature that will be presented quarterly in JVIR. The format is uniquely designed for the busy interventional radiology practitioner. Case presentations are short and to the point. Discussions are succinct and pertinent to current practice. Each quarter, a difficult or problem case is presented and the reader is challenged with questions relevant to the case. Short answers are then provided based on referenced sources from the current literature. Cases are drawn from the interventional radiology experience at the University of California San Francisco and are edited by Jeanne M. LaBerge, MD, and Robert K. Kerlan, Jr, MD.