Defense Trade Cooperation Treaties & Resources. This page provides information intended to assist in using the Defense Trade Cooperation Treaties the U.S. has signed with the United Kingdom and Australia. The information provided here supports the users of the exemptions to the International Traffic in Arms Regulations (ITAR) created pursuant to the Treaties.
Definition of Lung Nodules. A lung nodule is defined as a âspotâ on the lung that is three centimeters (about 1.5 inches) in diameter or less. If an abnormality is seen on an x-ray of the lungs that is larger than three centimeters, it is considered a âlung massâ instead of a nodule and is more likely to be cancerous.
A solitary pulmonary nodule (SPN) is the most common radiographic presentation of lung cancer. The imaging characteristics of solitary pulmonary nodules are described and illustrated.The appearance and implications of extension of lung cancer to the pleura are explored.he radiologic work-up of the solitary pulmonary nodule is pursued to facilitate the resection of potentially curable lung cancers and to minimize the resection of benign nodules. Neoplasm can often be strongly suspected or excluded based on the radiologic characteristics of the solitary pulmonary nodule.