Unmasking tumor-induced osteomalacia: A diagnostic odyssey from ankylosing spondylitis to fibroblast growth factor 23-mediated hypophosphatemia
Background: Tumor-induced osteomalacia is a rare paraneoplastic syndrome caused by autonomous secretion of fibroblast growth factor 23 (FGF23) by occult mesenchymal tumors. Its insidious presentation frequently mimics inflammatory arthropathies, leading to misdirected therapy and severe diagnostic delay. Case summary:...