Cervicothoracic sign

The cervicothoracic sign, a variation of the silhouette sign, helps to localize a mass in the superior mediastinum on frontal chest radiographs as either anterior or posterior. 

As the anterior mediastinum ends at the level of the clavicles, the upper border of an anterior mediastinal lesion cannot be visualised extending above the clavicles. Any lesions with a discernible upper border above that level must be located posteriorly in the chest, i.e. apical segments of upper lobes, pleura, or posterior mediastinum 3.

History and etymology

Benjamin Felson (1913-1988) was an American radiologist who is believed to be the first to describe this sign.

Chest x-ray
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Article information

rID: 19630
System: Chest
Section: Signs
Tag: sign, cases
Synonyms or Alternate Spellings:
  • Cervico-thoracic sign

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Cases and figures

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    Case 1: multinodular goitre
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    Case 2: ganglioneuroma
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