Reconfirmation of the anatomy of the left triangular ligament and the appendix fibrosa hepatis in human livers, and its implication in abdominal surgery

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  • Kimitaka Kogure
    Laboratory of Cell Physiology; Institute for Molecular and Cellular Regulation; Gunma University; 3-39-15 Showamachi Maebashi Gunma 371-8512 Japan
  • Itaru Kojima
    Laboratory of Cell Physiology; Institute for Molecular and Cellular Regulation; Gunma University; 3-39-15 Showamachi Maebashi Gunma 371-8512 Japan
  • Hiroyuki Kuwano
    Department of General Surgical Science; Graduate School of Medicine; Gunma University; Maebashi Gunma Japan
  • Toshiyuki Matsuzaki
    Department of Anatomy and Cell Biology; Graduate School of Medicine; Gunma University; Maebashi Gunma Japan
  • Hiroshi Yorifuji
    Department of Neuromuscular and Developmental Anatomy; Graduate School of Medicine; Gunma University; Maebashi Gunma Japan
  • Kuniaki Takata
    Office of the President; Gunma University; Maebashi Gunma Japan
  • Masatoshi Makuuchi
    Department of Surgery; Japanese Red Cross Medical Center; Shibuya Tokyo Japan

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The aim of the present study was to clarify the anatomy between the left triangular ligament (LTL) and the appendix fibrosa hepatis (AFH) in order not to sever the AFH when dissecting the LTL.Totals of 43 and 27 cadaveric livers were examined macroscopically and histologically, respectively.The LTL attached itself to the diaphragmatic surface of the AFH through almost all lengths of the AFH. This might be the reason why AFH is so often dissected together with the LTL. There were two types of relation between the LTL and the AFH; in one type, the starting point of the LTL existed on the left liver and in the other type, it was on the AFH. Twenty-five of 27 AFH included remnants of the bile duct and 12 of 25 AFH had comparatively large bile ducts, which was unexceptionally accompanied by the well-developed peribiliary vascular plexus. AFH showed a variety of shapes, such as rectangular (6/43), long triangular (4/43), short triangular (7/43), triangular plus cordlike (11/43), cordlike (12/43) and bifurcated (3/43) types.As AFH sometimes includes relatively large bile ducts, it is recommended for surgeons to sever the AFH not just simply by electrocautery but by ligating its stump securely.

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