title: Late thyroid toxicity in 153 long-term survivors of allogeneic bone marrow transplantation for acute lymphoblastic leukaemia.
abstract: The purpose of this study was to identify risk factors for hypothyroidism after bone marrow transplantation (BMT) for high-risk or relapsed acute lymphoblastic leukaemia (ALL) in children. In all, 388 children with acute lymphoblastic leukaemia underwent allogeneic bone marrow transplantation between 1984 and 1994. Overall 5-year survival was 54.6%. Thyroid function was assessed in the 153 patients with more than 5 years of follow-up. In total, 16 patients developed uncompensated hypothyroidism (UH) and 46 compensated hypothyroidism (CH) a median of 2.9 and 2.7 years, respectively, after BMT. Thyroid dysfunction-free survival rates were 73.2% after 5 years and 59.2% after 10 years. Three factors were significantly associated with the onset of hypothyroidism, namely age, bone marrow transplantation in second remission, and single-dose total body irradiation (TBI). Ultrasonography of the thyroid showed nodules in 10 of 35 patients. The median time from BMT to nodule detection was 7.8 years. Cytology (n=5) and surgery (n=4) showed no evidence of thyroid cancer. Four of the 14 patients who received cytoreduction without TBI but with busulphan and cyclophosphamide developed UH (n=2) or CH (n=2). We concluded that children who undergo BMT for ALL are at a high risk of subsequent thyroid dysfunction.
authors.affiliation: Service de Pédiatrie, CHRU Hôpital Nord, Saint-Etienne Cedex, France. claire.berger@chu-st-etienne.fr
authors.forename: C
authors.initials: C
authors.lastname: Berger
authors.forename: B
authors.initials: B
authors.lastname: Le-Gallo
authors.forename: J
authors.initials: J
authors.lastname: Donadieu
authors.forename: O
authors.initials: O
authors.lastname: Richard
authors.forename: A
authors.initials: A
authors.lastname: Devergie
authors.forename: C
authors.initials: C
authors.lastname: Galambrun
authors.forename: P
authors.initials: P
authors.lastname: Bordigoni
authors.forename: E
authors.initials: E
authors.lastname: Vilmer
authors.forename: E
authors.initials: E
authors.lastname: Plouvier
authors.forename: Y
authors.initials: Y
authors.lastname: Perel
authors.forename: G
authors.initials: G
authors.lastname: Michel
authors.forename: J L
authors.initials: JL
authors.lastname: Stephan
mesh_terms: D000293:Adolescent; D016026:Bone Marrow Transplantation / Q000009:adverse effects*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007037:Hypothyroidism / Q000209:etiology*; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D054198:Precursor Cell Lymphoblastic Leukemia-Lymphoma / Q000150:complications / Q000628:therapy*; D012307:Risk Factors; D017741:Survivors; D014184:Transplantation, Homologous; D014916:Whole-Body Irradiation / Q000009:adverse effects