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We report a 31 year old patient with cerebrotendinous xanthomatosis who presented with dementia, tendinous xanthomas, cataracts, pyramidal involvement, cerebellar ataxia and peripheral neuropathy. Cerebral CT scan demonstrated diffuse hypodensity in the white matter in both cerebellar hemispheres while MR detected additional focal alterations in both frontal lobes. MR study of the Achilles tendon showed a diffuse enlargement of the tendon with multiple areas of hypersignals in T1 and T2 demonstrative of the lipid deposits, interpossed between the isosignal zones that may correspond to the inflammatory reaction secondary to the accumulation of cholesterol and cholestanol.

Two siblings, from consanguineous parents, developed in their twenties a Parkinsonian syndrome. In the elder, the disease evolved for 13 years and the necropsic study was diagnostic of Hallervorden-Spatz disease. The younger sibling is severely affected after 12 years of the disorder. Several CT and one MR studies done in this patient during the last 4 years have been normal. Ultrastructural studies of the bone marrow histiocytes and blood lymphocytes disclosed peculiar inclusions. Bromocriptine in low doses proved to be a beneficial therapy for this patient.