Background: It is important to differentiate intramedullary neoplastic lesions from nonneoplastic diseases such as multiple sclerosis (MS) and other demyelinating or inflammatory diseases.

Case Description: A 26-year-old Japanese male presented with a history of intracranial germinomas and obstructive hydrocephalus, treated with endoscopic surgery, and adjuvant chemotherapy and radiation therapy. Three years later, he developed paresthesias involving the right hand and both lower extremities. The cervical MR scan demonstrated a heterogeneously enhancing intramedullary C1-C2 lesion with surrounding edema. On cytological examination of the cerebrospinal fluid (CSF), there were no neoplastic cells. However, the fluid was positive for oligoclonal immunoglobulin G (IgG) bands. The patient received steroid pulse therapy to address the potential MS diagnosis. The follow-up MR showed reduced edema, but no change in the size of the intramedullary lesion. Therefore, the patient underwent a cervical laminectomy for tumor resection. The pathology was consistent with the same cranial germinoma treated 3 years previously. He subsequently received whole spinal radiation and three courses of chemotherapy.

Conclusion: Some spinal cord tumors may produce oligoclonal IgG bands in CSF. In this case, an intramedullary C1-C2 spinal cord germinoma was originally misdiagnosed as MS due to the presence of oligoclonal IgG bands in CSF. Differentiating this tumor from MS and initiating appropriate treatment were critical into the care of this patient.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6826275PMC
http://dx.doi.org/10.25259/SNI_466_2019DOI Listing

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