Cupola sign

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Cupola sign
Cupola sign.jpg
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

"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".

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<span class="mw-page-title-main">History of medieval Arabic and Western European domes</span> Domes in religious architecture

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Islamic rule in South Asia brought with it the use of domes constructed with stone, brick and mortar, and iron dowels and cramps. Centering was made from timber and bamboo. The use of iron cramps to join together adjacent stones was known in pre-Islamic India, and was used at the base of domes for hoop reinforcement. The synthesis of styles created by this introduction of new forms to the Hindu tradition of trabeate construction created a distinctive architecture.

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