Observational studyArchives of osteoporosis2026
Malignant transformation in patients with monoclonal gammopathy of undetermined significance treated with teriparatide for osteoporosis: a bicenter retrospective study and analysis of the French national pharmacovigilance database.
Observational study in Archives of osteoporosis, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- Clinical guidance on evaluation and management of bone fragility in patients with monoclonal gammopathy of undetermined significance (MGUS): an IOF position statement.Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA · 2026Article
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8 authors.
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Abstract
Malignant transformation in patients with monoclonal gammopathy of undetermined significance treated with teriparatide was evaluated. Among 29 patients, only two progressed to hematologic malignancy (one multiple myeloma, one Waldenström's macroglobulinemia). These findings are reassuring and suggest that TPT may remain an option for selected patients with severe osteoporosis and MGUS. PURPOSE: Osteoporosis is a highly prevalent bone disease with limited therapeutic options, particularly in multimorbid patients. Monoclonal gammopathy of undetermined significance (MGUS), a frequent finding in osteoporosis and a recognized fracture risk factor, often leads to contraindication of teriparatide (TPT), further restricting treatment choices. This study aimed to assess hematologic malignant transformation in osteoporotic patients with MGUS treated with TPT.
methodsA retrospective bicenter observational study was conducted at Lille and Angers University Hospitals (2016-2022). Patients with osteoporosis and confirmed MGUS at TPT initiation were included. Demographic, hematologic, bone, and treatment parameters were collected. In parallel, hematologic malignancies reported with TPT were reviewed from the French national pharmacovigilance database (PVDB) over the same period.
resultsTwenty-nine patients (69% women; mean age 72.6 ± 12.6 years) were included. Most had major comorbidities (89.7% with Charlson Comorbidity Index ≥ 3). MGUS was IgG-type in 55.2% and IgM-type in 41.4%. The mean follow-up from TPT initiation was 60.2 ± 30.7 months (median 54.0; 95% CI 49.0-71.4). Two patients developed hematologic malignancy: one multiple myeloma (MM) 7 years after TPT and one Waldenström's macroglobulinemia 21 months after initiation, both with intermediate-risk MGUS. TPT was well tolerated with premature discontinuation in 17.2% of cases. Of the two hematologic malignancies identified in the PVDB, only one (MM) occurred in a patient with pre-existing MGUS.
conclusionMalignant progression was rare, providing reassuring evidence regarding hematologic safety. TPT may be considered in selected patients with severe osteoporosis and MGUS, provided careful hematologic monitoring.
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