Presentation
Chronic headache.
Patient Data
Age: 35 years
Gender: Female
From the case:
Petrous apex effusion
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Slightly expansile non-aerated area in the right petrous apex. Otherwise unremarkable.
From the case:
Petrous apex effusion
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An about 13 mm T2, FLAIR hyperintense lesion is visible in the same region, showing intrmediate signal on T1 and no restricted diffusion.
Case Discussion
Multiple benign etiologies are among the different diagnoses:
- Cholesterol granuloma, even though on T1 higher signal would be expected.
- Trapped fluid within the air cells.
- Primary mucocoele.
The lesion was stable on follow-up imaging.