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BMJ Case Rep. 2010; 2010: bcr0120102681.
Published online 2010 August 16. doi:  10.1136/bcr.01.2010.2681
PMCID: PMC3027506
Novel treatment (new drug/intervention; established drug/procedure in new situation)

Teriparatide treatment complicated by malignant myeloma


Recombinant human parathyroid hormone (1–34) (rhPTH 1–34), teriparatide (Forsteo in Europe), is a new compound that has been introduced and shown to be successful in the treatment of osteoporosis. The mechanisms of action include a pulsative influence on the RANKL/OPG system resulting in osteoblast activation and increased bone formation by teriparatide. In malignant myeloma there is an imbalance between osteoclast and osteoblast activity with involvement of the RANKL/OPG system among others. We report a case with monoclonal gammopathy of uncertain significance (MGUS) who developed malignant myeloma after teriparatide treatment and we suggest that in addition to malignant myeloma and smouldering myeloma, MGUS should also be considered contraindicated for teriparatide treatment.

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