这个词是什么意思？
A HERNIA due to an imperfect closure or weakness of the umbilical ring. It appears as a skin-covered protrusion at the UMBILICUS during crying, coughing, or straining. The hernia generally consists of OMENTUM or SMALL INTESTINE. The vast majority of umbilical hernias are congenital but can be acquired due to severe abdominal distention.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D006554 · MeSH 2026。
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