这个词是什么意思？
Reduction of bone mass without alteration in the composition of bone, leading to fractures. Primary osteoporosis can be of two major types: postmenopausal osteoporosis (OSTEOPOROSIS, POSTMENOPAUSAL) and age-related or senile osteoporosis.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D010024 · MeSH 2026。
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