ONCOGENIC_Martini 14/06/2006 10.27 Pagina 76 Case report Oncogenic osteomalacia Giuseppe Martini choice; if the tumour cannot be found or if the tumour is unre- Fabrizio Valleggi sectable for its location, chronic administration of phosphate Luigi Gennari and calcitriol is indicated. Daniela Merlotti KEY WORDS: oncogenic osteomalacia, hypophosphoremia, fractures, oc- Vincenzo De Paola treotide scintigraphy. Roberto Valenti Ranuccio Nuti Introduction Department of Internal Medicine, Endocrine-Metabolic Sciences and Biochemistry, University of Siena, Italy Osteomalacia is a metabolic bone disorder characterized by reduced mineralization and increase in osteoid thickness. Address for correspondence: This disorder typically occurs in adults, due to different condi- Prof. Giuseppe Martini tions impairing matrix mineralization. Its major symptoms are Dipartimento di Medicina Interna e Malattie Metaboliche diffuse bone pain, muscle weakness and bone fractures with Azienda Ospedaliera Senese minimal trauma. When occurs in children, it is associated with Policlinico “S. Maria alle Scotte” a failure or delay in the mineralization of endochondral new Viale Bracci 7, 53100 Siena, Italy bone formation at the growth plates, causing gait distur- Ph. 0577586452 bances, growth retardation, and skeletal deformities, and it is Fax 0577233446 called rickets. E-mail:
[email protected] Histologically patients with osteomalacia present an abun- dance of unmineralized matrix, sometimes to the extent that whole trabeculae appeared to be composed of only osteoid