PURPOSE: To develop magnetic resonance (MR) imaging criteria for staging rectal cancer. MATERIALS AND METHODS: Thirty-six patients with rectal tumors underwent MR imaging with an endorectal surface coil. MR images were compared with specimens from the resected tumor. RESULTS: Rectal wall layers were reliably demonstrated. The MR imaging-determined tumor stage agreed with pathologic findings in 81% of cases. A retrospective review found the integrity of the rectal wall layers at the lesion center an accurate criterion for interpreting the local extent of the lesion. Lymph nodes as small as 2 mm were demonstrated. Although sensitive for demonstrating perirectal adenopathy, MR imaging had a specificity of only 72% for N1 disease. CONCLUSION: Endorectal surface coil MR imaging shows promise for staging rectal lesions. Additional studies are necessary to further establish criteria for interpreting the images.
PURPOSE: To develop magnetic resonance (MR) imaging criteria for staging rectal cancer. MATERIALS AND METHODS: Thirty-six patients with rectal tumors underwent MR imaging with an endorectal surface coil. MR images were compared with specimens from the resected tumor. RESULTS: Rectal wall layers were reliably demonstrated. The MR imaging-determined tumor stage agreed with pathologic findings in 81% of cases. A retrospective review found the integrity of the rectal wall layers at the lesion center an accurate criterion for interpreting the local extent of the lesion. Lymph nodes as small as 2 mm were demonstrated. Although sensitive for demonstrating perirectal adenopathy, MR imaging had a specificity of only 72% for N1 disease. CONCLUSION: Endorectal surface coil MR imaging shows promise for staging rectal lesions. Additional studies are necessary to further establish criteria for interpreting the images.
Authors: Jimmy C M Li; Shirley Y W Liu; Anthony W I Lo; Sophie S F Hon; Simon S M Ng; Janet F Y Lee; Ka Lau Leung Journal: Surg Endosc Date: 2010-05-13 Impact factor: 4.584
Authors: Young Taik Oh; Myeong Jin Kim; Joon Seok Lim; Joo Hee Kim; Kang Young Lee; Nam Kyu Kim; Won Ho Kim; Ki Whang Kim Journal: Korean J Radiol Date: 2005 Jan-Mar Impact factor: 3.500
Authors: Rebecca I Hartman; Connie Y Chang; Jennifer Y Wo; Jonathan D Eisenberg; Theodore S Hong; Mukesh G Harisinghani; G Scott Gazelle; Pari V Pandharipande Journal: Acad Radiol Date: 2012-09-02 Impact factor: 3.173