iceberg sign

A sharply demarcated radiopacity seen in plain films of the chest or abdomen that may be either sub- or supradiaphragmatic, which corresponds to a paravertebral tuberculosis abscess, aneurysm, esophagogastric lesion or the azygous continuation of the inferior vena cava

iceberg sign

Thoraco-abdominal sign Imaging A sharply-demarcated radiopacity seen in plain films of the chest or abdomen that may be either sub- or supradiaphragmatic, corresponding to a paravertebral TB abscess, aneurysm, esophagogastric lesion or the azygous continuation of the inferior vena cava.