Abstract
We report on a Mexican girl who developed cerebellar ataxia at age 3 years and pancytopenia at age 13 years. Cerebral computed tomography scan and magnetic resonance imaging showed evidence of severe cerebellar atrophy. Telangiectasias were not present; immunoglobulins and alpha-fetoprotein levels were normal. Cytogenetic studies showed no evidence of spontaneous chromosome aberrations, a normal rate of diepoxybutane (DEB) and mitomycin C (MMC)-induced chromosome aberrations, but an increased response to bleomycin. The phenotype support the diagnosis of ataxia-pancytopenia syndrome, although monosomy of chromosome 7 was not found in bone marrow. The cytogenetic studies suggest that this may be a chromosomal instability disorder.
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