这个词是什么意思？
A mucosal tumor of the urinary bladder or nasal cavity in which proliferating epithelium is invaginated beneath the surface and is more smoothly rounded than in other papillomas. (Stedman, 25th ed)
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D018308 · MeSH 2026。
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