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2005•American Journal of HematologyRequires access

Compound heterozygote state for GγAγ(δβ)°‐thalassemia and hereditary persistence of fetal hemoglobin

Supan Fucharoen, Sitthichai Panyasai, Satja Surapot, Goonnapa Fucharoen, Kanokwan Sanchaisuriya

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Abstract

We report a hitherto undescribed interaction of a deletional (deltabeta) degrees -thalassemia and a deletional hereditary persistence of fetal hemoglobin (HPFH) in an adult Thai individual. He was a 40-year-old Thai male who had the following hematologic data: Hb 13.9 g/dL, Hct 43.8%, MCV 78.0 fL, MCH 24.7 pg, MCHC 31.6 g/dL, and RDW 17.1%. Hemoglobin analysis revealed 97% Hb F with Ggamma-globin chain predominant. Globin gene analyses demonstrated that he carried the GgammaAgamma(deltabeta) degrees -thalassemia deletion in trans to the HPFH-6. Hematologic data of the patient were compared to those of the heterozygotes for these high-Hb F determinants found in his parents and an unrelated Thai patient with a compound HPFH-6/deletion-inversion Ggamma(Agammadeltabeta) degrees -thalassemia previously described.

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We report a hitherto undescribed interaction of a deletional (deltabeta) degrees -thalassemia and a deletional hereditary persistence of fetal hemoglobin (HPFH) in an adult Thai individual. He was a 40-year-old Thai male who had the following hematologic data: Hb 13.9 g/dL, Hct 43.8%, MCV 78.0 fL, MCH 24.7 pg, MCHC 31.6 g/dL, and RDW 17.1%. Hemoglobin analysis revealed 97% Hb F with Ggamma-globin chain predominant. Globin gene analyses demonstrated that he carried the GgammaAgamma(deltabeta) degrees -thalassemia deletion in trans to the HPFH-6. Hematologic data of the patient were compared to those of the heterozygotes for these high-Hb F determinants found in his parents and an unrelated Thai patient with a compound HPFH-6/deletion-inversion Ggamma(Agammadeltabeta) degrees -thalassemia previously described.

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Available abstract

We report a hitherto undescribed interaction of a deletional (deltabeta) degrees -thalassemia and a deletional hereditary persistence of fetal hemoglobin (HPFH) in an adult Thai individual. He was a 40-year-old Thai male who had the following hematologic data: Hb 13.9 g/dL, Hct 43.8%, MCV 78.0 fL, MCH 24.7 pg, MCHC 31.6 g/dL, and RDW 17.1%. Hemoglobin analysis revealed 97% Hb F with Ggamma-globin chain predominant. Globin gene analyses demonstrated that he carried the GgammaAgamma(deltabeta) degrees -thalassemia deletion in trans to the HPFH-6. Hematologic data of the patient were compared to those of the heterozygotes for these high-Hb F determinants found in his parents and an unrelated Thai patient with a compound HPFH-6/deletion-inversion Ggamma(Agammadeltabeta) degrees -thalassemia previously described.

Key concepts: Compound heterozygosity, Thalassemia, Heterozygote advantage, Fetal hemoglobin, Hemoglobin, Globin, Hemoglobinopathy, Fetus

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