Pulmonary embolus:

An embolus is a blockage of an artery in the lungs by fat, air, tumor tissue, or blood clot.
- Reviewed last on: 6/10/2008
- Sean O. Stitham, MD, private practice in Internal Medicine, Seattle, Washington; and James R. Mason, MD, Oncologist, Director, Blood and Marrow Transplantation Program and Stem Cell Processing Lab, Scripps Clinic, Torrey Pines, California. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.