Three Cases of Anorectal Malignant Melanoma Treated with Laparoscopic Abdominoperineal Resection

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  • Yoshida Shin
    Department of Gastroenterological Breast and Endocrine Surgery, Yamaguchi University Graduate School of Medicine
  • Suzuki Nobuaki
    Department of Gastroenterological Breast and Endocrine Surgery, Yamaguchi University Graduate School of Medicine
  • Tomochika Shinobu
    Department of Gastroenterological Breast and Endocrine Surgery, Yamaguchi University Graduate School of Medicine
  • Shindo Yoshitaro
    Department of Gastroenterological Breast and Endocrine Surgery, Yamaguchi University Graduate School of Medicine
  • Tokumitsu Yukio
    Department of Gastroenterological Breast and Endocrine Surgery, Yamaguchi University Graduate School of Medicine
  • Iida Michihisa
    Department of Gastroenterological Breast and Endocrine Surgery, Yamaguchi University Graduate School of Medicine
  • Takeda Shigeru
    Department of Gastroenterological Breast and Endocrine Surgery, Yamaguchi University Graduate School of Medicine
  • Ioka Tatsuya
    Oncology Center, Yamaguchi University Hospital
  • Hazama Shoichi
    Department of Gastroenterological Breast and Endocrine Surgery, Yamaguchi University Graduate School of Medicine Department of Translational Research and Developmental Therapeutics against Cancer, Yamaguchi University Faculty of Medicine
  • Shirahama Tsuzuri
    Department of Pathology, Yamaguchi University Graduate School of Medicine
  • Kawano Hiroo
    Department of Basic Laboratory Sciences, Yamaguchi University Graduate School of Medicine
  • Ikeda Eiji
    Department of Pathology, Yamaguchi University Graduate School of Medicine
  • Nagano Hiroaki
    Department of Gastroenterological Breast and Endocrine Surgery, Yamaguchi University Graduate School of Medicine

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Other Title
  • 腹腔鏡下腹会陰式直腸切断術を施行した直腸肛門部悪性黒色腫の3例

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Abstract

<p>We report three cases of anorectal malignant melanoma (AMM) that were treated with laparoscopic abdominoperineal resection (APR). The first case was a 73-year-old woman with a chief complaint of melena. She was diagnosed with pT1bN2aM0 (9th edition of the Japanese classification of colorectal, appendiceal, and anal carcinoma) and adjuvant chemotherapy was performed after radical surgery. Four months after surgery, lateral lymph node metastasis was found. The second case was a 45-year-old man on hemodialysis with a chief complaint of an anal mass. He was diagnosed with pT2N1bM0 and adjuvant chemotherapy was not performed. Two months after surgery, inguinal lymph node metastasis was found. The third case was a 66-year-old woman with a chief complaint of melena. She was diagnosed with pT1bN0M0 and nivolumab was used as adjuvant chemotherapy for 1 year. She remains alive without recurrence 20 months after surgery. There are reports of 51 AMM cases in which APR was performed in Japan, and these show that regional lymph node metastasis is a risk factor for early distant recurrence after surgery.</p>

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