| Cupola sign | |
|---|---|
 | |
| Cupola sign | |
| Differential diagnosis | pneumoperitoneum |
The cupola sign is seen on a supine chest or abdominal radiograph in the presence of pneumoperitoneum.
It refers to dependent air that rises within the abdominal cavity of the supine patient to accumulate underneath the central tendon of the diaphragm in the midline. It is seen as lucency overlying the lower thoracic vertebral bodies. The superior border is well defined, but the inferior margin is not.
Term
[edit]"Cupola" is an architectural term, referring to a small dome (in particular, a small dome crowning a roof or a turret). The word derives from a Latin word for a "little cup".
References
[edit]- Marshall Geoffrey B. “The Cupola Sign.” Radiology 241, no. 2 (November 1, 2006): 623–624. doi:10.1148/radiol.2412040700.
- Fleming J, Honour H, Pevsner N. The Penguin Dictionary of Architecture: Fourth Edition. Penguin Books. ISBN 0140512411. Read it at Google Books - Find it at Amazon
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction