Deep sulcus sign (chest)
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At the time the article was created Maen K H had no recorded disclosures.View Maen K H's current disclosures
At the time the article was last revised Mostafa El-Feky had no financial relationships to ineligible companies to disclose.View Mostafa El-Feky's current disclosures
The deep sulcus sign on a supine chest radiograph raises suspicion of a pneumothorax.
On a supine chest radiograph (common in intensive care units or as part of a trauma radiograph series), it may be the only suggestion of a pneumothorax because air collects anteriorly and basally, within the non-dependent portions of the pleural space, as opposed to the apex when the patient is upright.
The costophrenic angle is abnormally deepened when the pleural air collects laterally, producing the deep sulcus sign.
Patients with chronic obstructive pulmonary disease (COPD) may exhibit deepened lateral costophrenic angles due to hyperinflation of the lungs and cause a false deep sulcus sign.
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