The Ewing's sarcoma family of tumors are aggressive malignant small round blue cell
tumors of undifferentiated mesenchymal origin. Skeletal Ewing's sarcoma is a common
entity that classically involves the diaphysis of the long bones, pelvis, ribs, and
sacrum. Extraosseous Ewing's sarcoma (EES) is rare, most commonly presenting as a
paravertebral mass lesion. Its manifestation as an anterior epidural mass lesion with
extension along brachial plexus is an even rarer phenomenon. A 25-year-old male presented
with neck stiffness and progressive weakness of the bilateral upper and lower limbs.
Magnetic resonance imaging of the cervical spine revealed an anterior epidural mass
lesion compressing the cervical cord and extending along the right brachial plexus,
suggesting imaging differentials of EES and lymphoma. The patient underwent laminectomy
with gross tumor resection, and histopathology confirmed a diagnosis of EES. EES should
be kept in the differential diagnosis of anterior epidural mass lesions in young adults,
specifically when the lesion shows extension along multiple neural foramina and nerve
plexus.
Key-words:
Ewing's sarcoma family of tumors - Ewing's sarcoma - extraosseous Ewing's sarcoma
- peripheral primitive neuroectodermal tumor