Palla's sign
Palla's Sign
Palla's sign (/pæləz saɪn/) is a medical sign used in the field of radiology to identify a specific abnormality in the pulmonary artery related to pulmonary embolism. The sign is named after the Italian radiologist, Antonio Palla, who first described it in 1983.
Etymology
The term "Palla's sign" is derived from the name of Antonio Palla, an Italian radiologist. Palla first described this sign in a study published in 1983, where he identified a specific radiographic sign indicative of pulmonary embolism.
Definition
Palla's sign is defined as an enlarged right descending pulmonary artery seen on a chest radiograph. This enlargement is typically associated with acute or chronic pulmonary embolism. The sign is considered positive when the diameter of the right descending pulmonary artery is larger than that of the adjacent ascending artery.
Related Terms
- Pulmonary embolism: A condition in which one or more arteries in the lungs become blocked by a blood clot.
- Radiology: The science dealing with X-rays and other high-energy radiation, especially the use of such radiation for the diagnosis and treatment of disease.
- Chest radiograph: An imaging test that uses X-rays to create pictures of the chest, including the heart, lungs, and chest wall.
See Also
References
- Palla, A., Donnamaria, V., Petruzzelli, S., Rossi, G., Riccetti, G., Giuntini, C. (1983). Enlarged right descending pulmonary artery: a radiologic sign of acute pulmonary embolism. Radiology, 147(2), 409-413.
External links
- Medical encyclopedia article on Palla's sign
- Wikipedia's article - Palla's sign
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