Surgery Today

, Volume 29, Issue 2, pp 170–173 | Cite as

Primary anorectal malignant melanoma: Report of a case

  • Yasutomo Ojima
  • Hirofumi Nakatsuka
  • Hajime Haneji
  • Tsuyoshi Kurihara
  • Seiji Sadamoto
  • Toshifumi Ohmoto
  • Norihiko Katayama
  • Kiyomi Taniyama
Case Reports


Primary anorectal malignant melanoma is a fairly uncommon but highly malignant disease. This disease is sometimes mistaken for such benign conditions as either a hemorrhoid or rectal polyp. We herein describe a case of early primary malignant melanoma of the anal canal. In this case, magnetic resonance (MR) imaging was found to be useful for diagnosing the melanotic melanoma. We especially emphasize the usefulness of a fat-saturation MR image in distinguishing melanotic melanoma from other rectal tumors.

Key Words

malignant melanoma anorectal region magnetic resonance imaging fat saturation 


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Copyright information

© Springer-Verlag 1999

Authors and Affiliations

  • Yasutomo Ojima
    • 1
  • Hirofumi Nakatsuka
    • 1
  • Hajime Haneji
    • 4
  • Tsuyoshi Kurihara
    • 1
  • Seiji Sadamoto
    • 1
  • Toshifumi Ohmoto
    • 2
  • Norihiko Katayama
    • 3
  • Kiyomi Taniyama
    • 5
  1. 1.Department of SurgeryKure City Medical Association HospitalKure City, HiroshimaJapan
  2. 2.Department of RadiologyKure City Medical Association HospitalKure City, HiroshimaJapan
  3. 3.Department of Internal MedicineKure City Medical Association HospitalKure City, HiroshimaJapan
  4. 4.Second Department of SurgeryHiroshima University School of MedicineHiroshimaJapan
  5. 5.Department of Clinical PathologyKure Kyosai HospitalHiroshimaJapan

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