Background Due to the gastrointestinal side-effects of oral iron supplementation in patients with deficiency anaemia, which impairs tolerance - many acute medical and haematology day units provide intravenous replacement therapy as cases. Hypophosphatemia is a frequent side effect following administration, can persist for weeks or months, under-recognised clinical practice lead presenting typic...

A 66-year-old man was referred for evaluation and management of persistent hypophosphatemia (0.42 mmol/l) related to hyperphosphaturia. The patient reported intense diffuse osteoarticular pain since 1 year with weight loss 9 kg. Osteomalacia diagnosed a Fanconi syndrome ruled out. An increased plasma value fibroblast growth factor 23 observed (2.5-fold the upper range limit), suggesting presenc...