title: Anorectal malignant melanoma: preoperative usefulness of magnetic resonance imaging.
abstract: Magnetic resonance imaging (MRI) findings in three patients with primary anorectal malignant melanoma are described. Two patients had melanotic and one had amelanotic anorectal melanoma. The findings of MRI with a pelvic coil and an endorectal coil were consistent with pathologic findings. MRI with a pelvic coil demonstrated the melanotic component as high signal intensity on T1-weighted imaging. MRI with a pelvic coil and an endorectal coil was useful for staging anorectal melanoma. This article describes the initial report of the use of an endorectal coil for malignant melanoma of the anorectum.
authors.affiliation: The Department of Surgery, Kyorin University School of Medicine, 6-20-2 Shinkawa, Mitaka, Tokyo, 181-8611, Japan.
authors.forename: Hiroyoshi
authors.initials: H
authors.lastname: Matsuoka
authors.forename: Akihisa
authors.initials: A
authors.lastname: Nakamura
authors.forename: Kaori
authors.initials: K
authors.lastname: Iwamoto
authors.forename: Masanori
authors.initials: M
authors.lastname: Sugiyama
authors.forename: Junichi
authors.initials: J
authors.lastname: Hachiya
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Atomi
authors.forename: Tadahiko
authors.initials: T
authors.lastname: Masaki
mesh_terms: D000328:Adult; D000368:Aged; D001005:Anus Neoplasms / Q000175:diagnosis*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D018328:Melanoma, Amelanotic / Q000175:diagnosis*; D012004:Rectal Neoplasms / Q000175:diagnosis*; D018227:Sarcoma, Clear Cell / Q000175:diagnosis*