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Published on: February 17, 2023
[Intramedullary tumours and pseudotumours].
G Cosnard1, T Duprez, C Grandin
1Cliniques Universitaires Saint-Luc UCL, avenue Hippocrate 10, 1200 Bruxelles, Belgique. guy.cosnard@uclouvain.be
Journal De Radiologie
|September 4, 2010
Summary
Spinal cord swelling and enhancement are not unique to tumors and can indicate other conditions. Differentiating intramedullary tumors requires analyzing location, size, and specific MRI features.
Area of Science:
- Radiology
- Neurology
- Oncology
Background:
- Spinal cord swelling and contrast enhancement on MRI are not pathognomonic for intramedullary tumors.
- These imaging findings can also be associated with inflammatory, infectious, granulomatous, or vascular diseases.
Observation:
- Intramedullary tumors exhibit specific characteristics including sagittal and axial location, size, and macroscopic components.
- Macroscopic components include calcium, fat, methemoglobin, melanin, hemosiderin, vascularity, cystic changes, and post-contrast enhancement.
- Effects on spinal cord tracts and associated edema are crucial diagnostic indicators.
Findings:
- Astrocytomas are typically lateral and infiltrative.
- Ependymomas are centrally located, causing white matter tract displacement and often have a hemosiderin cap.
- Hemangioblastomas are postero-lateral with characteristic enhancement and a vascular pedicle.
- Metastases are frequently associated with significant edema or leptomeningeal involvement.
Implications:
- Accurate characterization of intramedullary lesions is vital for appropriate diagnosis and treatment planning.
- Distinguishing tumors from non-neoplastic conditions based on imaging features improves patient management.
- Understanding the specific MRI signatures of different intramedullary pathologies aids in differential diagnosis.
