Marchiafava-Bignami disease (MBD) is a rare CNS disorder. It is usually seen in the context of alcoholism and malnutrition (originally described in Italian alcoholic patients) 5 . The condition classically involves the corpus callosum with necrosis and demyelination.
MBD is in most instances seen in chronic alcoholics, and as such the epidemiology reflects this demographic, with middle-aged to elderly male patients (40-60 years of age) being most commonly affected 2.
The clinical presentation of MBD can vary and patients often present with non specific clinical features such as motor or cognitive disturbances, a hemispheric disconnection syndrome and / or seizures.
The disease is attributed to a deficiency in vitamin B complex, and results in necrosis and demyelination of the corpus callosum.
Histologically, the myelin loss may be striking and may be accompanied by axonal degeneration 5.
Prior to the advent of cross-sectional imaging, the diagnosis was only limited to post mortem examination and only the acute variety was diagnosed.
Marchiafava-Bignami disease typically begins in the body of the corpus callosum and later involves the genu and then splenium 2. It classically involves the central layers with relative sparing of the dorsal and ventral extremes (which may be seen as a sandwich sign on sagittal MRI imaging).
- may typically show hypo-attenuating regions in the corpus callosum.
- in exceptional situations of haemorrhage, these regions may turn into iso or hyper attenuating 3.
Corpus callosum may appear oedematous in the acute phase and atrophic in the chronic phase.
- T1 - may show hypo intense foci in corpus callosum in the acute phase.
- T2 - in the acute phase, hyper-intensities in the corpus callosum in the correct clinical setting may aid to the diagnosis. in the sub acute phase may show hypo intense focal lesions (likely as a result of haemosiderin) 3-4.
- MR spectroscopy - the NAA / Cr ratio may show a progressive decrease to a minimum level after the 1st few months followed by a partial recovery after around 11 months 3.
Treatment and prognosis
Administration of vitamin B complex results in improvement in many patients, although some do not recover and may die of the disease 2.
General imaging differential considerations include
- 1. Johkura K, Naito M, Naka T. Cortical involvement in Marchiafava-Bignami disease. AJNR Am J Neuroradiol. 2005;26 (3): 670-3. AJNR Am J Neuroradiol (citation) - Pubmed citation
- 2. Arbelaez A, Pajon A, Castillo M. Acute Marchiafava-Bignami disease: MR findings in two patients. AJNR Am J Neuroradiol. 24 (10): 1955-7. AJNR Am J Neuroradiol (citation) - Pubmed citation
- 3. Gambini A, Falini A, Moiola L et-al. Marchiafava-Bignami disease: longitudinal MR imaging and MR spectroscopy study. AJNR Am J Neuroradiol. 2003;24 (2): 249-53. AJNR Am J Neuroradiol (citation) - Pubmed citation
- 4. Bourekas EC, Varakis K, Bruns D et-al. Lesions of the corpus callosum: MR imaging and differential considerations in adults and children. AJR Am J Roentgenol. 2002;179 (1): 251-7. AJR Am J Roentgenol (citation) - Pubmed citation
- 5. Haaga JR, Boll D. CT and MRI of the whole body. Mosby. (2009) ISBN:0323053750. Read it at Google Books - Find it at Amazon
Synonyms & Alternative Spellings
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