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Year : 2019  |  Volume : 67  |  Issue : 4  |  Page : 1166-

Bare Orbit Sign/Empty Orbit Sign – Is It Really Empty?

Ramakrishna Narra, Sushil Kumar Kamaraju, Anusha Putcha 
 Department of Radiodiagnosis, Katuri Medical College, Guntur, Andhra Pradesh, India

Correspondence Address:
Dr. Ramakrishna Narra
Flat No: 30, 5 Floor,Venkatesh Estate Apartment, ½ Chandramouli Nagar, Guntur - 522 006, Andhra Pradesh

How to cite this article:
Narra R, Kamaraju SK, Putcha A. Bare Orbit Sign/Empty Orbit Sign – Is It Really Empty?.Neurol India 2019;67:1166-1166

How to cite this URL:
Narra R, Kamaraju SK, Putcha A. Bare Orbit Sign/Empty Orbit Sign – Is It Really Empty?. Neurol India [serial online] 2019 [cited 2021 Jan 27 ];67:1166-1166
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Full Text

A 30-year-old female patient came to our outpatient department with chief complaints of chest pain and shortness of breath for the previous one month. On examination, proptosis of left eye with pulsating exophthalmos and café-au-lait spots on the skin were present. A CT scan of the chest revealed, a right paravertebral posterior mediastinal mass was present. On the AP view of the skull, the innominate line was absent in the left orbit. A CT scan of the brain revealed, dysplasia of left sphenoid wing was noted with mild herniation of left temporal lobe and meninges toward the orbit [Figure 1]d.{Figure 1}

Based on the above findings, the patient was diagnosed with Neurofibromatosis type I.

Innominate line is a landmark formed by the projection of greater wing of sphenoid, seen in orbit on a frontal x-ray of skull [Figure 1]b.[1],[2]

In Neurofibromatosis type I, the bare orbit sign or empty orbit sign is a characteristic finding which does not mean that the orbit is actually empty, but actually represents the absence of the innominate line on imaging, seen due to sphenoid wing dysplasia [Figure 1]a and [Figure 1]c.[3],[4]

Declaration of patient consent

The authors certify that they have obtained all appropriate patient consent forms. In the form the patient(s) has/have given his/her/their consent for his/her/their images and other clinical information to be reported in the journal. The patients understand that their names and initials will not be published and due efforts will be made to conceal their identity, but anonymity cannot be guaranteed.

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Conflicts of interest

There are no conflicts of interest.


1Bertelli E, Regoli M. Branching of the foramen rotundum. A rare variation of the sphenoid. Ital J Anat Embryol 2014;119:148-53.
2Moore KL. Clinically Oriented Anatomy. 6th ed. Lippincott Williams and Wilkins; 2010.
3Cranio-orbital-temporal neurofibromatosis: A case report and review of literature. 2004;14:317-9.
4Chavhan GB, Shroff MM. Twenty classic signs in neuroradiology: A pictorial essay. Indian J Radiol Imaging 2009;19:135-45.