case_images: PMC6923526_01
case_images: Intense focally increased uptake within a 0.5-cm lytic bony lesion in the
  anteromedial proximal right fibular cortex (arrow), consistent with the
  culprit mesenchymal tumor producing tumor induced osteomalacia.
case_images: 10.1177_2324709619895162-fig1.jpg
case_images: PMC6923526_01_10.1177_2324709619895162-fig1.jpg
case_images: fig1-2324709619895162
case_images: FGF23 prompted a search for a latent neoplasm causing TIO. Functional imaging was ordered, and an octreotide scan showed a right proximal fibular mesenchymal tumor (Figure 1).
case_images: Magnetic resonance imaging of solid intramuscular tumor corresponding to
  octreotide avid lesion.
case_images: 10.1177_2324709619895162-fig2.jpg
case_images: PMC6923526_01_10.1177_2324709619895162-fig2.jpg
case_images: fig2-2324709619895162
case_images: Anatomical imaging (magnetic resonance imaging) confirmed the findings (Figure 2).
case_images: Serum phosphorus trend over 3 months, with an increase seen post tumor
  excision.
case_images: 10.1177_2324709619895162-fig3.jpg
case_images: PMC6923526_01_10.1177_2324709619895162-fig3.jpg
case_images: fig3-2324709619895162
case_images: PTH levels normalized to 50 ng/mL and 4 mg/dL, respectively (Figure 3). Patient reported satisfaction with significant improvement in her bone pain and also complete resolution of her psychiatric symptoms.