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Clinical and laboratory features of patients with osteomalacia initially presenting with neurological manifestations

Authors
 S. W. Kim  ;  N. Hong  ;  Y. Rhee  ;  Y.-C. Choi  ;  H. Y. Shin  ;  S. M. Kim 
Citation
 OSTEOPOROSIS INTERNATIONAL, Vol.29(7) : 1617-1626, 2018 
Journal Title
OSTEOPOROSIS INTERNATIONAL
ISSN
 0937-941X 
Issue Date
2018
Keywords
Bone scan ; Hypocalcemia ; Hypophosphatemia ; Osteomalacia
Abstract
Patients with osteomalacia often visit the neurology department with conditions mimicking other myopathies. We analyzed clinical features of osteomalacia patients who visited the neurology department. These patients frequently presented with hypocalcemia, hypovitaminosis D, and pain with less severe weakness. Osteomalacia should be considered when patients present with pain and weakness.

INTRODUCTION: Osteomalacia is a disease of bone metabolism; however, some patients with osteomalacia initially visit the neurology department. As these patients often complain of weakness and gait disturbance, osteomalacia can be confused with other myopathies. We analyzed the clinical features of patients with osteomalacia who visited the neurology department.

METHODS: We retrospectively reviewed the medical records. Osteomalacia was diagnosed based on symptoms, laboratory features, and imaging results. We compared the characteristics of patients with osteomalacia who visited the neurology department with (1) those who did not visit the neurology department and (2) patients with idiopathic inflammatory myopathy.

RESULTS: Eighteen patients with osteomalacia visited the neurology department (NR group). The common etiologies in the NR group included tumors or antiepileptic medication, whereas antiviral medication was the most common in patients who did not visit the neurology department (non-NR group). The NR group showed lower serum calcium (p = 0.004) and 25-hydroxyvitamin D (p = 0.006) levels than the non-NR group. When compared with patients with inflammatory myopathy, both groups showed proximal dominant weakness. However, pain was more common in osteomalacia than in myopathy (p = 0.008), and patients with osteomalacia showed brisk deep tendon reflex more often (p = 0.017). Serum calcium (p = 0.003) and phosphate (p < 0.001) levels were lower in osteomalacia than in myopathy.

CONCLUSIONS: It was not uncommon for patients with osteomalacia to visit the neurology department. The clinical presentation of these patients can be more complex owing the superimposed neurological disease and accompanying hypocalcemia. Osteomalacia should be considered when patients present with pain and weakness.
Full Text
https://link.springer.com/article/10.1007%2Fs00198-018-4501-1
DOI
10.1007/s00198-018-4501-1
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Internal Medicine (내과학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Neurology (신경과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Seung Min(김승민) ORCID logo https://orcid.org/0000-0002-4384-9640
Kim, Seung Woo(김승우) ORCID logo https://orcid.org/0000-0002-5621-0811
Shin, Ha Young(신하영) ORCID logo https://orcid.org/0000-0002-4408-8265
Rhee, Yumie(이유미) ORCID logo https://orcid.org/0000-0003-4227-5638
Choi, Young Chul(최영철) ORCID logo https://orcid.org/0000-0001-5525-6861
Hong, Nam Ki(홍남기) ORCID logo https://orcid.org/0000-0002-8246-1956
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/163133
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