Frontoethmoidal encephalocele

Case contributed by Ahmed Abdrabou
Diagnosis certain

Presentation

CSF rhinorrhea of several months. No history of trauma.

Patient Data

Age: 40 years old
Gender: Male
This study is a stack
Axial
non-contrast
This study is a stack
Sagittal
non-contrast
This study is a stack
Coronal
non-contrast
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Info

A cystic lesion is seen filling the left nasal cavity.

A bone defect is noted at the left aspect of cribriform plate through which this cystic lesion is arising. 

mri
This study is a stack
Axial
T2
This study is a stack
Coronal
T1
This study is a stack
Coronal T2
fat sat
This study is a stack
Sagittal
T1
This study is a stack
Axial T1
fat sat
This study is a stack
Axial
T1 C+
This study is a stack
Coronal
T1 C+
Download
Info

A CSF containing cyst is seen herniating through the cribriform plate into the nasal cavity containing part of the frontal lobe. 

Case Discussion

Frontoethmoidal encephalocele is a sac containing CSF, meninges and brain tissue herniating through a bone defect at the nasal or frontal bones. It can occur spontaneously, be post traumatic or secondary to raised intracranial pressure e.g. tumor. 

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