An inflammatory condition that affects the cartilaginous portions of the ribs and causes chest pain. It affects one or more ribs, most commonly the second or third ribs, especially where these ribs meet the breastbone (sternum). The pain that is produced is sharp and often intensified by change of position of the ribs, such as lying down, bending over, coughing or sneezing. Symptoms may be confused with that of coronary artery disease or a heart attack.