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  • Title: Hemoglobin H disease induced by the common SEA deletion and the rare hemoglobin Quong Sze in a Thai female: longitudinal clinical course, molecular characterization, and development of a PCR/RFLP-based detection method.
    Author: Sura T, Trachoo O, Viprakasit V, Vathesatogkit P, Tunteeratum A, Busabaratana M, Wisedpanichkij R, Isarangkura P.
    Journal: Ann Hematol; 2007 Sep; 86(9):659-63. PubMed ID: 17503046.
    Abstract:
    We report on a Thai female patient who presented with hypochromic microcytic anemia, hepatosplenomegaly, and failure to thrive since 3 years of age. Hematological and hemoglobin (Hb) analysis were consistent with a clinical diagnosis of Hb H disease. However, no abnormal Hb fraction had ever been detected. During the 20 years of follow-up, this patient experienced several episodes of hemolytic crisis, which worsened her anemia, necessitating blood transfusion. Recently, we identified Hb Quong Sze (Hb QS), a highly unstable globin gene mutation affecting codon 125 (CTG-->CCG) of alpha(2) globin gene in trans with the commonest alpha(0) thalassemia (-(SEA)) in the patient. This report highlights the clinical significance of Hb QS in Southeast Asians, as previously almost all of the patients described with this variant were of Chinese origin.
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