Why is the umbilicus concave? A histological and three-dimensional anatomical study revealing the "umbilical sheath".

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Title: Why is the umbilicus concave? A histological and three-dimensional anatomical study revealing the "umbilical sheath".
Authors: Muro S; Department of Clinical Anatomy, Graduate School of Medical and Dental Sciences, Institute of Science Tokyo, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan. muro.fana@tmd.ac.jp., Tanioka T; Department of Gastrointestinal Surgery, Institute of Science Tokyo, Tokyo, Japan., Hirano N; Department of Clinical Anatomy, Graduate School of Medical and Dental Sciences, Institute of Science Tokyo, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan., Liu T; Department of Clinical Anatomy, Graduate School of Medical and Dental Sciences, Institute of Science Tokyo, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan., Nimura A; Department of Functional Joint Anatomy, Biomedical Engineering Laboratory, Institute of Industry Incubation, Institute of Science Tokyo, Tokyo, Japan., Kinugasa Y; Department of Gastrointestinal Surgery, Institute of Science Tokyo, Tokyo, Japan., Akita K; Department of Clinical Anatomy, Graduate School of Medical and Dental Sciences, Institute of Science Tokyo, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan.
Source: Anatomical science international [Anat Sci Int] 2026 Jun 18. Date of Electronic Publication: 2026 Jun 18.
Publication Type: Journal Article
Journal Info: Publisher: Springer Japan Country of Publication: Japan NLM ID: 101154140 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1447-073X (Electronic) Linking ISSN: 1447073X NLM ISO Abbreviation: Anat Sci Int Subsets: MEDLINE
Database: MEDLINE Ultimate
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  Data: <searchLink fieldCode="AU" term="%22Muro+S%22">Muro S</searchLink>; Department of Clinical Anatomy, Graduate School of Medical and Dental Sciences, Institute of Science Tokyo, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan. muro.fana@tmd.ac.jp.<br /><searchLink fieldCode="AU" term="%22Tanioka+T%22">Tanioka T</searchLink>; Department of Gastrointestinal Surgery, Institute of Science Tokyo, Tokyo, Japan.<br /><searchLink fieldCode="AU" term="%22Hirano+N%22">Hirano N</searchLink>; Department of Clinical Anatomy, Graduate School of Medical and Dental Sciences, Institute of Science Tokyo, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan.<br /><searchLink fieldCode="AU" term="%22Liu+T%22">Liu T</searchLink>; Department of Clinical Anatomy, Graduate School of Medical and Dental Sciences, Institute of Science Tokyo, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan.<br /><searchLink fieldCode="AU" term="%22Nimura+A%22">Nimura A</searchLink>; Department of Functional Joint Anatomy, Biomedical Engineering Laboratory, Institute of Industry Incubation, Institute of Science Tokyo, Tokyo, Japan.<br /><searchLink fieldCode="AU" term="%22Kinugasa+Y%22">Kinugasa Y</searchLink>; Department of Gastrointestinal Surgery, Institute of Science Tokyo, Tokyo, Japan.<br /><searchLink fieldCode="AU" term="%22Akita+K%22">Akita K</searchLink>; Department of Clinical Anatomy, Graduate School of Medical and Dental Sciences, Institute of Science Tokyo, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan.
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  Data: <searchLink fieldCode="JN" term="%22101154140%22">Anatomical science international</searchLink> [Anat Sci Int] 2026 Jun 18. <i>Date of Electronic Publication: </i>2026 Jun 18.
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        Value: 10.1007/s12565-026-00950-w
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      – TitleFull: Why is the umbilicus concave? A histological and three-dimensional anatomical study revealing the "umbilical sheath".
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            NameFull: Muro S
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              Text: 2026 Jun 18
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