Related Experiment Videos
Canavan disease: CT and MR imaging of the brain
J Brismar1, G Brismar, G Gascon
1Department of Radiology, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia.
Abstract:
Canavan disease (spongy degeneration of the brain) is a rare lethal neurodegenerative disorder of infancy; fewer than 100 cases have been reported. We describe a series of nine patients with enzymatic defects and clinical features consistent with Canavan disease; in two patients the disease was proved by biopsy. All patients were examined with CT and seven with MR. In every instance, both CT and MR showed white-matter disease, sometimes sparing the external and internal capsules, the corpus callosum, and the deep cerebellar white matter. Atrophic changes were found in six patients; the changes were marked in one and slight in five. There was no obvious correlation between the severity of the white-matter disease and the clinical presentation--one patient with severe white-matter disease was clinically normal. The CT and MR findings in Canavan disease are nonspecific and somewhat nonuniform: its preautopsy diagnosis relies primarily on biochemical findings.
Insights
Canavan disease, a rare infantile neurodegenerative disorder, presents with widespread white-matter abnormalities on CT and MR imaging. Diagnosis relies on biochemical findings due to nonspecific imaging results.
Area of Science:
- Neuroscience
- Pediatric Neurology
- Medical Imaging
Background:
- Canavan disease is a rare, lethal, infantile neurodegenerative disorder.
- Fewer than 100 cases have been reported globally.
- Characterized by spongy degeneration of the brain.
Purpose of the Study:
- To describe imaging findings in a series of patients with Canavan disease.
- To correlate imaging findings with clinical presentation and biochemical defects.
- To evaluate the utility of CT and MR imaging in diagnosing Canavan disease.
Main Methods:
- Enzymatic assays and clinical evaluation of nine patients.
- Histopathological confirmation in two patients via biopsy.
- Computed Tomography (CT) and Magnetic Resonance (MR) imaging of the brain in all patients.
Main Results:
- All patients exhibited white-matter disease on both CT and MR imaging.
- White-matter abnormalities sometimes spared specific brain regions like the corpus callosum.
- Atrophic changes were observed in six patients; imaging findings showed no clear correlation with clinical severity.
Conclusions:
- CT and MR findings in Canavan disease are nonspecific and variable.
- Imaging findings alone are insufficient for definitive pre-autopsy diagnosis.
- Biochemical analysis remains the primary method for diagnosing Canavan disease.