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Black eyebrow sign

Case contributed by Mohammad Taghi Niknejad
Diagnosis certain

Presentation

Trauma.

Patient Data

Age: 40 years
Gender: Male
x-ray

A lucent crescent is noted abutting left orbial superior rim. 

ct

Left orbital emphysema known as black eyebrow sign on plain film - secondary to fracture of medial wall of the orbit.

Case Discussion

Post traumatic case showing air crescent abutting left orbital superior rim.The appearance of this curvilinear lucency is like that of an eyebrow. The black eyebrow sign indicates orbital emphysema, typically from a orbital fracture, with air having entered from the adjacent sinuses.

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