title: The prevalence of avascular necrosis in sickle cell anemia: correlation with alpha-thalassemia.
abstract: The purpose of the present study was to investigate the effect of alpha-thalassemia on the prevalence of avascular necrosis in 52 adult patients with sickle cell anemia. alpha-Globin genotypes were determined by restriction endonuclease mapping of genomic DNA extracted from peripheral blood leukocytes. Radiographs of humeral and femoral heads were interpreted by two radiologists who were not aware of the clinical picture and the genotype of the patients in the study. We present data showing that there is a significant positive correlation between alpha-gene deletion and the prevalence and extent of avascular necrosis in our patient population.
authors.affiliation: Department of Medicine, Cardeza Foundation for Hematologic Research, Thomas Jefferson University, Philadelphia, PA 19107.
authors.forename: S K
authors.initials: SK
authors.lastname: Ballas
authors.forename: C A
authors.initials: CA
authors.lastname: Talacki
authors.forename: V M
authors.initials: VM
authors.lastname: Rao
authors.forename: R M
authors.initials: RM
authors.lastname: Steiner
mesh_terms: D000328:Adult; D000755:Anemia, Sickle Cell / Q000150:complications / Q000235:genetics*; D002872:Chromosome Deletion; D005260:Female; D005271:Femur Head Necrosis / Q000000981:diagnostic imaging / Q000453:epidemiology / Q000235:genetics; D005838:Genotype; D006801:Humans; D008297:Male; D008875:Middle Aged; D010020:Osteonecrosis / Q000000981:diagnostic imaging / Q000453:epidemiology / Q000235:genetics*; D011859:Radiography; D015183:Restriction Mapping; D013789:Thalassemia / Q000150:complications / Q000235:genetics*