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Posterior fossa hemangioblastomas: MR imaging.
Radiology
|May 1, 1989
Summary
Magnetic resonance (MR) imaging effectively identifies posterior fossa hemangioblastomas, aiding diagnosis. Specific MR features, like abnormal vessels and mural nodules, are key indicators for these brain tumors.
Area of Science:
- Neuroradiology
- Oncology
- Neurosurgery
Background:
- Posterior fossa hemangioblastomas are rare tumors.
- Accurate diagnosis and preoperative assessment are crucial.
Purpose of the Study:
- To analyze magnetic resonance (MR) imaging findings of posterior fossa hemangioblastomas.
- To correlate MR findings with computed tomography (CT) and angiography.
- To evaluate the diagnostic utility of MR imaging for hemangioblastomas.
Main Methods:
- Retrospective analysis of 18 surgically proved posterior fossa hemangioblastomas in 15 patients.
- Correlation with CT and angiographic findings.
- Review of tumor location, appearance, vascularity, and associated findings.
Main Results:
- Thirteen tumors in the cerebellar hemisphere, three in the vermis, two in the medulla.
- Tumor appearances included solid, solid with central cysts, and cysts with mural nodules.
- Abnormal tumor vessels (signal void) seen in 13 tumors; hemorrhage in four.
Conclusions:
- MR imaging can suggest hemangioblastoma diagnosis through posterior fossa mass and abnormal vessels.
- A peripheral cyst with a mural nodule and enlarged feeding vessels on MR may be pathognomonic.
- MR imaging is a valuable tool for diagnosing and assessing posterior fossa hemangioblastomas.