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Case Reports
. 2022 Jan 12;16(1):22.
doi: 10.1186/s13256-021-03220-7.

Tumor-induced osteomalacia: a case report

Khalid Aligail  1 , Joel A Dave  1 , Ian Louis Ross  2
Affiliations
Case Reports

Tumor-induced osteomalacia: a case report

Khalid Aligail et al. J Med Case Rep. .

Abstract

Background: Tumor-induced osteomalacia is a rare, acquired paraneoplastic syndrome, including hypophosphatemia, high serum alkaline phosphatase, reduced active vitamin D, suboptimal bone mineral density, bone pain, fragility fractures, and muscle weakness.

Case presentation: We report a case of 74-year-old male of mixed ancestry with hypophosphatemia resistant to treatment despite optimal compliance, associated with profound reduction of bone mineral density and multiple nontraumatic fractures, including bilateral rib fractures, lower-thoracic (T11, T12) vertebrae, and two fractures involving the surgical and anatomical neck of the right humerus. We discuss an approach to identifying the underlying cause of hypophosphatemia associated with fragility fractures, and options for management of this rare condition.

Conclusion: Although rare, tumor-induced osteomalacia can be diagnosed if a logical stepwise approach is implemented. Surgery could be curative if the tumor is properly located and is resectable.

Keywords: Fibroblast growth factor-23; Hypophosphatemia; Osteomalacia; Tumor-induced osteomalacia.

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Conflict of interest statement

We have no conflict of interest, whatsoever.

Figures

Fig. 1
Fig. 1
Demonstration of a tumor in the right humeral head by Gallium 68-DOTANOC PET/CT (A) and magnetic resonance imaging (MRI) (B)
See this image and copyright information in PMC

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