title: Prevalence of scoliosis in beta-thalassemia.
abstract: The objective of this study was to determine the prevalence and possible pathogenesis of scoliosis in beta-thalassemia in our country, and to compare its characteristics to those of patients with idiopathic scoliosis from the same geographic area. Twenty-four [13 male and 11 female thalassemic patients aged 16 +/- 7 years (range 7-32 years)] of 115 examined patients with beta-thalassemia showed scoliosis of 14 degrees +/- 11 (range 10-65 degrees) radiologically. The prevalence of scoliosis in the thalassemic population was 21% in this series, whereas the overall prevalence of scoliosis in the general Greek population was 6% (Smyrnis PN, Valavanis J, Alexopoulos A, Siderakis G, Giannestras NJ: School screening for scoliosis in Athens, J Bone Joint Surg 61B:215-217, 1979). The scoliosis prevalence in the general population was significantly higher in the females (5%) than in the males (1%), whereas no difference in prevalence was found between the two sexes in the thalassemic population. The most common curve pattern in thalassemia was the left lumbar (38%) followed by the right lumbar (21%), whereas in patients with idiopathic scoliosis the left thoracolumbar most commonly appeared (25%) followed by the left lumbar (14%). No patient with thalassemia showed radiographic signs of congenital spinal deformities and spinal fractures, whereas all patients showed a significant retardation of their skeletal maturation. The age of the thalassemic patients with scoliosis was significantly (p = 0.0003) higher than in patients without scoliosis. The hematocrit of the thalassemic patients with scoliosis was significantly (p = 0.0012) lower than in those without scoliosis, whereas the rate of transfusions was not correlated with the magnitude of the scoliosis. The level of ferritin was significantly (p = 0.025) higher in the thalassemic patients with scoliosis than in those without scoliosis. The duration of Desferal treatment was significantly (p = 0.0357) longer in thalassemic patients with scoliosis when compared with those without scoliosis. Thus, the prevalence, curve pattern, and etiology of scoliosis in beta-thalassemia differ from those of idiopathic scoliosis, indicating that the spinal deformities in thalassemia represent a distinct type of scoliosis.
authors.affiliation: Department of Orthopaedics, General Hospital, Agios Andreas Patras, Greece.
authors.forename: P G
authors.initials: PG
authors.lastname: Korovessis
authors.forename: D
authors.initials: D
authors.lastname: Papanastasiou
authors.forename: M
authors.initials: M
authors.lastname: Tiniakou
authors.forename: N G
authors.initials: NG
authors.lastname: Beratis
mesh_terms: D000293:Adolescent; D000328:Adult; D001827:Body Height; D002648:Child; D002675:Child, Preschool; D003676:Deferoxamine / Q000627:therapeutic use; D005260:Female; D006115:Greece; D006400:Hematocrit; D006801:Humans; D008297:Male; D015995:Prevalence; D011859:Radiography; D012016:Reference Values; D012600:Scoliosis / Q000150:complications* / Q000000981:diagnostic imaging / Q000453:epidemiology*; D017678:Sex Distribution; D017086:beta-Thalassemia / Q000097:blood / Q000150:complications* / Q000453:epidemiology*
chemical_list: D003676:Deferoxamine