Very late nonfatal consequences of fractionated TBI in children undergoing bone marrow transplant.
OBJECTIVE
To describe long-term late consequences in children who received total body irradiation (TBI) for hematopoietic stem cell transplantation 10 years earlier.


METHODS
A cohort of 42 children treated with TBI between 1985 and 1993, still alive at least 10 years after fractionated TBI (FTBI), was evaluated. Twenty-five patients received FTBI at 330 cGy/day for 3 days (total dose 990 cGy), whereas 17 children were administered fractions of 200 cGy twice daily for 3 days (total dose 1200 cGy). Twenty-seven patients received autologous and 16 allogeneic hematopoietic stem cell transplantation. Median age at TBI was 6.3 years, and 18.4 years at most recent follow-up.


RESULTS
Cataract was diagnosed in 78% of patients after a median of 5.7 years. Hypothyroidism was detected in 12%, whereas thyroid nodules were observed in 60% of our population after a median interval of 10.2 years. Patients treated with 990 cGy developed thyroid nodules more frequently than those treated with 1200 cGy (p = 0.0002). Thyroid carcinoma was diagnosed in 14% of the total population. Females who received FTBI after menarche more frequently developed temporary ovarian dysfunction than those treated before menarche, but cases of persistent ovarian dysfunction did not differ between the two groups. Indirect signs of germinal testicular dysfunction were detected in 87% of males. Restrictive pulmonary disease was observed in 74% of patients. Osteochondroma was found in 29% of patients after a median interval of 9.2 years. This latter complication appeared more frequently in patients irradiated before the age of 3 years (p < 0.001).


CONCLUSIONS
This study shows that late effects that are likely permanent, although not fatal, are frequent in survivors 10 years after TBI. However, some of the side effects observed shortly after TBI either disappeared or remained unchanged without signs of evolution. Monitoring is recommended to pursue secondary prevention strategies and counseling on family planning.
Faraci
Maura
M
Department of Hematology/Oncology and Bone Marrow Transplantation, G. Gaslini Children's Hospital, Genova, Italy. maurafaraci@ospedale-gaslini.ge.it
Barra
Salvina
S
Cohen
Amnon
A
Lanino
Edoardo
E
Grisolia
Francesca
F
Miano
Maurizio
M
Foppiano
Franca
F
Sacco
Oliviero
O
Cabria
Manlio
M
De Marco
Riccardo
R
Stella
Gilberto
G
Dallorso
Sandro
S
Bagnasco
Francesca
F
Vitale
Vito
V
Dini
Giorgio
G
Haupt
Riccardo
R
D000293:Adolescent; D000328:Adult; D002386:Cataract / Q000209:etiology; D002648:Child; D002675:Child, Preschool; D005260:Female; D005500:Follow-Up Studies; D018380:Hematopoietic Stem Cell Transplantation / Q000401:mortality; D006801:Humans; D007006:Hypogonadism / Q000209:etiology; D007037:Hypothyroidism / Q000209:etiology; D007223:Infant; D008168:Lung / Q000528:radiation effects; D008297:Male; D009381:Neoplasms, Radiation-Induced / Q000209:etiology; D012516:Osteosarcoma / Q000209:etiology; D012737:Sex Factors; D013997:Time Factors; D014916:Whole-Body Irradiation / Q000009:adverse effects*