Ewing sarcoma - sacrum

Case contributed by Dr Bahman Rasuli

Presentation

Pelvic pain for the past 3 months.

Patient Data

Age: 25 years
Gender: Male
CT

There is a lytic lesion involving the left S1 vertebral body, sacral ala and body with bony destruction and spinal extension. There is no associated sclerosis.

The left-sided sacroiliac joint is unremarkable.

MRI

Lytic expansile multiloculated heterogenous signal enhancing mass with soft tissue component at the S1 vertebral body and left pedicle as well as the left sacral blade is seen due to bone marrow infiltration.

Extracanalicular extension of the soft tissue component through the left neural foraminal and compressing the nerve roots.

Pelvic cavity soft tissue extension deep to the iliopsoas muscle also is noted.  

Case Discussion

Cytogenesis:

Positive for EWSRI (22q12) gene rearrangement by FISH.

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Case information

rID: 70203
Published: 8th Aug 2019
Last edited: 14th Aug 2019
Inclusion in quiz mode: Included
Institution: Jame Jam Imaging Center

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