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Bone Marrow Transplant 2002 Jan;29(1):33-39

 

Recovery of bone mass and normalization of bone turnover in long-term survivors of allogeneic bone marrow transplantation.

 

Kananen K, Volin L, Tahtela R, Laitinen K, Ruutu T, Valimaki MJ.

Division of Endocrinology, Department of Medicine, Helsinki University Central Hospital, Helsinki, Finland.

 

Osteoporotic fractures are potential long-term complications of bone marrow transplantation (BMT).

 

We previously reported that bone mineral density (BMD) of patients undergoing allogeneic BMT decreased by 6% to 9% during the first 6 months after BMT and that bone turnover rate was still increased 1 year after BMT. BMT patients do not need lifelong immunosuppressive treatment, which should offer favorable circumstances for the recovery of BMD.

 

Thus, 27 (14 women, 13 men) of 29 long-term survivors of our previous study were invited to a follow-up study at a median of 75 months after BMT. From 12 months after BMT the BMD of the lumbar spine had increased by 2.4% (P = 0.002). The respective changes in femoral sites were +4.1% in the femoral neck (P = 0.087), 4.0% in the trochanter (P = 0.095), +4.7% in Ward's triangle (P = 0.072) and +1.4% in the total hip (P = 0.23).

 

The markers of bone formation, serum osteocalcin and type I procollagen aminoterminal propeptide (PINP) had returned to control levels, but out of the markers of bone resorption the mean level of serum type I carboxyterminal telopeptide (ICTP) was 41% higher (P = 0.0001) and that of urinary type I collagen N-terminal telopeptide/creatinine (NTx) 41% lower (P = 0.0002) in patients than in controls.

 

The mean serum 25-hydroxyvitamin D [25(OH)D] was 33% lower in patients (P = 0.0002), most of whom had hypovitaminosis D [serum 25(OH)D [less-than-or-eq, slant]37 nmol/l].

 

Except for two, males had serum testosterone level lower than before BMT and four men had hypogonadism.

 

In conclusion, in long-term survivors of allogeneic BMT BMD recovers and bone turnover state normalizes as compared to the situation 1 year after BMT. More attention should be paid to the vitamin D status of all recipients and to possible hypogonadism of male patients.

 

 

 

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