Novel biallelic ATM mutations coexist with a mosaic form of triple X syndrome in an 11-year-old girl at remission after T cell acute leukemia

Immunogenetics
Svetlana O SharapovaOlga V Aleinikova

Abstract

Ataxia-telangiectasia (AT) is a rare neurodegenerative disease characterized by an early onset ataxia, oculocutaneous telangiectasia, immunodeficiency, recurrent infections, radio-sensitivity, and a predisposition to malignancy. We present the case of a child with coexistent AT and trisomy X (47,XXX). We used fluorescent in situ hybridization (FISH) to confirm that this person had 47,XXX karyotype in blood cells, bone marrow, fibroblasts, and buccal smear. Standard cytogenetic studies (not banded) were conducted on blood cells. G-banding analysis was performed on bone marrow cells at the time of the leukemia diagnosis. Flow cytometric investigation of lymphocytes and Sanger sequencing of the ATM gene were used for diagnosis confirmation and description. We report the case of an 11-year-old girl at remission after having T cell acute leukemia for 7 years with progressive signs of ataxia-telangiectasia and with additional X chromosome since birth. At the age of 2 years and 7 months, she was diagnosed with pre-T acute leukemia. From the age of four, she had gait abnormalities. AT was established at the age of seven based on clinical signs and laboratory findings (increased alpha fetoprotein-AFP [227]) and confirmed by detecting co...Continue Reading

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Citations

Jun 9, 2020·Frontiers in Genetics·Dustin B Miller, Stephen R Piccolo

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