Phosphaturic mesenchymal tumor is a Tumor
induced osteomalacia (TIO) which is a rare metabolic
bone disorder due to renal phosphate wasting and
abnormal production of FGF-23. Here we report a case
of 26 year old male who presented with complaints of
multiple joint pain and inability to walk with laboratory
investigations suggestive of hypophosphataemia and a
lesion in right lower limb causing TIO diagnosed by
multidisciplinary approach. Patient underwent surgical
excision with complete resolution of symptoms.
Tumor induced Osteomalacia (TIO) , Fibroblast growth factor 23(FGF-23) , Hypophosphataemia.