Asymmetric Fatty Marrow in the Petrous Apex

Case contributed by Dr Amr Farouk


50-year-old male patient complaining of a headache

Patient Data

Age: 50 years old
Gender: Male

Unenhanced T1 & T2 weighted image reveals smoothly marginated T1 hyperintense signal in right petrous apex.(fat signal) 


Case Discussion

Asymmetric fatty marrow of right petrous apex.

Asymmetric pneumatization is related to another normal variation: asymmetric fatty marrow within the petrous apex. This finding is a common incidental finding on brain, skull base, and soft-tissue neck MRI studies obtained for evaluation of nonotologic complaints. Typically, normal marrow contains significant adipose tissue, and signal characteristics parallel those of scalp or orbital fat. Fatty marrow is hyperintense on routine T1- and T2-weighted sequences. (1)


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Case information

rID: 55572
Published: 14th Sep 2017
Last edited: 14th Aug 2019
Inclusion in quiz mode: Excluded

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