Deep sulcus sign

Dr Craig Hacking and Maen K H et al.

The deep sulcus sign on a supine chest radiograph is an indication of a pneumothorax.

In a supine film (common in the ICU), it may be the only indication of a pneumothorax because air collects anteriorly and basally, within the nondependent 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.

Differential diagnosis

Patients with chronic obstructive pulmonary disease (COPD) may exhibit deepened lateral costophrenic angles due to hyperaeration of the lungs and cause a false deep sulcus sign.

See also

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Article information

rID: 13294
Systems: Chest, Trauma
Section: Signs
Tag: refs
Synonyms or Alternate Spellings:

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