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Multiple “Solitary Fibrous Tumor” of the Spine: MRI Appearance 2003

Lee H.J., Heary R., Cho E.S., Samuel P.
University Hospital, UMDNJ-New Jersey Medical School
Newark, NJ

Purpose:
To describe the MRI findings of an unusual case of multiple “solitary fibrous tumor” in the spinal canal. Solitary fibrous tumor (SFT) is a rare spindle cell neoplasm that typically arises in the pleura and other serosal surfaces. Multiple solitary fibrous tumor arises from the spinal dura has not been described in the literature.

Materials and Methods:
A 40-year-old woman complained of nonspecific back pain and paresthesias of both hands. Spinal cord compression was suspected clinically. MRI of the entire spine with and without contrast was performed.

Results:
The T1 weighted image shows a well defined ovoid shaped hypointense mass in the intradural extramedullary space at C6 level. This lesion remains hypointense on T2 weighted sequence. It measures approximately 1.5 cm in diameter. The spinal cord is compressed. A second smaller lesion is noted at T2 level with similar signal intensity change on both T1 and T2 weighted images. The post contrast T1 weighted image shows homogenous enhancement of both lesions. The differential diagnosis includes multiple meningioma, dural metastasis. The patient underwent surgery. The tumor located in the intradural, extramedullar space. The histology and CD 34 immunoreactivity are consistent with solitary fibrous tumor.

Conclusion:
There has been a steady increase in the number of extrapleural site of SFT. The MR imaging finding of the solitary fibrous tumor is similar to that of meningioma. One may include the SFT as a differential diagnosis of intrdural, extramedullary mass in the spine.

Presenting Author: Huey-Jen Lee, M.D. member of ARRS
The paper has not been previously presented