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[MRT in primary and tumor-induced syringomyelia]
P Schubeus1, W Schörner, H Henkes
1Radiologische Klinik, Universitätsklinikum Rudolf Virchow, Standort Charlottenburg, Freie Universität Berlin.
Rofo : Fortschritte Auf Dem Gebiete Der Rontgenstrahlen Und Der Nuklearmedizin
|December 1, 1989
Summary
Magnetic resonance imaging (MRI) can differentiate between primary syringomyelia and tumor-induced syrinx. Key MRI indicators for tumor-related syrinx include spinal cord irregularity and diffuse T2 signal changes near the lesion.
Area of Science:
- Neurology
- Radiology
- Oncology
Context:
- Syringomyelia, a condition characterized by fluid-filled cavities within the spinal cord, can be idiopathic or secondary to other pathologies.
- Distinguishing between primary syringomyelia and syrinx caused by intramedullary tumors is crucial for appropriate patient management and treatment.
- Magnetic resonance imaging (MRI) is the primary diagnostic tool for evaluating spinal cord abnormalities.
Purpose:
- To retrospectively analyze MRI findings in patients with primary syringomyelia and tumor-induced syringomyelia.
- To identify specific MRI features that reliably differentiate between these two conditions.
- To evaluate the utility of contrast enhancement (Gd-DTPA) in demarcating tumors from syrinxes.
Summary:
- MRI findings in primary syringomyelia and tumor-induced syringomyelia often show similarities.
- Tumor-induced syringomyelia is characterized by spinal cord irregularity, eccentric lumen, and diffuse T2 signal hyperintensity adjacent to the tumor.
- Primary syringomyelia typically presents with T2 signal changes confined to the cavity and associated findings like spinal canal widening and cerebellar tonsil ectopia.
- Gadolinium-enhanced MRI aids in delineating tumor margins from the syrinx, improving diagnostic accuracy.
Impact:
- MRI is a reliable method for distinguishing tumor-induced syringomyelia from primary syringomyelia.
- Accurate differentiation impacts treatment strategies, potentially avoiding unnecessary surgery for idiopathic cases and enabling prompt tumor intervention.
- This study provides specific imaging criteria to aid clinicians in diagnosing the etiology of syringomyelia.