Osteoporosis, bone & mineral

Prognostic Factors for Refractory Outcome in Localizing Tumor-induced Osteomalacia (TIO): Experience in a Tertiary Center

J Clin Endocrinol MetabPublished Retrospective cohort study

Authors' conclusion

Tumors diagnosed within the past decade with clear resection margins had more favorable prognoses. With regards to tumoral factors, baseline biochemistry was uninformative in predicting cure, while bone and/or spine localizations were associated with a refractory outcome.

Study context

Population
Patients with tumor-induced osteomalacia diagnosed 1998–2023 who underwent targeted intervention after successful localization
Participants
44 patients
Exposure
Prognostic factors for cure vs refractory outcome after targeted intervention for localized TIO
  • Curen = 29
  • Refractoryn = 15
Outcome
Cure (normophosphatemia without supplementation for ≥1 month, maintained at last follow-up)
Follow-up
Last
Methodological detailssingle tertiary centre
  • Single tertiary centre

Main finding

As reported in the abstract

Cure (univariate Cox regression HR for predicting cure)
Hazard ratio (95% CI)P value
Diagnosed after 2013vs Diagnosed before 2013univariate Cox regression
3.43(1.45–8.11)
P = 0.005
Negative surgical marginvs Positive/unspecified marginsunivariate Cox regression
2.56(1.20–5.45)
P = 0.015
Soft tissue originvs Boneadjusted for year of diagnosis
2.72(1.22–6.09)
P = 0.015
Spinevs Nonspineadjusted for year of diagnosis
0.22(0.05–0.96)
P = 0.043

Patients

Achieved cure
29
Refractory outcome
15

Observational data: associations, not effects.

Further findings

Postprocedural FGF23 as biochemical marker of cure

AUC
0.899 (95% CI 0.764-1.00, P < .001)
  • Best biochemical marker of cure

Parts of this Brief are withheld: the automatic checks could not confirm them against the abstract.

Original publication

Prognostic Factors for Refractory Outcome in Localizing TIO: Experience in a Tertiary Center. J Clin Endocrinol Metab. Published 6 January 2025. doi:10.1210/clinem/dgae911

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