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Is There Any Link Between Tumor-Induced Osteomalacia and Psoriasis? a Case Report Publisher



Akbari M1 ; Larijani B2 ; Sharghi S3 ; Jalili A2 ; Sajjadijazi SM2
Authors
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Authors Affiliations
  1. 1. Students' Scientific Research Center, Tehran University of Medical Sciences, Tehran, Iran
  2. 2. Tehran University of Medical Sciences, Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Inst., Tehran, Iran
  3. 3. Tehran University of Medical Sciences, Diabetes Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran, Iran

Source: Journal of Diabetes and Metabolic Disorders Published:2017


Abstract

Background: Tumor-induced osteomalacia is an uncommon paraneoplastic syndrome caused by Fibroblast growth factor-23-secreting tumors. It is characterized by phosphaturia, hypophosphatemia, and a high plasma level of alkaline phosphatase. Case presentation: We report a young patient with psoriasis who had suffered from bone pain and muscle weakness for more than 6.5 years. He was finally diagnosed with tumor-induced osteomalacia. However, mistakenly attributing the patient's signs and symptoms to psoriatic arthritis for a long time had resulted in multiple complications for the patient. Finally, the tumor was localized and surgically resected. This resulted in clinical improvements and the resolution of all biochemical abnormalities. Conclusion: To our knowledge, this is the second case of tumor-induced osteomalacia accompanied by psoriasis. There is growing evidence to suggest that Fibroblast growth factor-23 has a role in regulating immune function while an increased level of it may play a role in the pathogenesis of psoriasis. As a result, tumor-induced osteomalacia may affect the psoriasis clinical course by secreting a high amount of Fibroblast growth factor-23. On the other hand, several studies have showed an increased risk of malignancy among patients with psoriasis. Consequently, long-term psoriasis may predispose patients to Fibroblast growth factor-23-secreting tumors. Finally, as psoriasis is a common disease, this presentation may simply be a coincidence. © 2017 The Author(s).