FGF23 and neoplasm: Various modalities have been used to detect the lesions responsible for oncogenic osteomalacia, including CT, MR, whole-body 99mTc-sestamibi scan111, octreotide scintigraphy,201 TI scintigraphy, 99mTc-MIBI SPECT, and venous sampling for FGF23 with MR imaging.10 Hypophosphatemic osteomalacia may be evident when the tumor has already become obvious as happened in all our three cases.