TY - JOUR
T1 - Magnetic resonance imaging of rectal cancer
AU - Ho, Mai Lan
AU - Liu, Judy
AU - Narra, Vamsidhar
PY - 2008/8
Y1 - 2008/8
N2 - Magnetic resonance imaging (MRI)is a useful modality for the evaluation of rectal cancer, providing superior anatomic/pathologic visualization when compared with endorectal ultrasound (EUS) and computed tomography (CT). Preoperative MRI is useful for tissue characterization and tumor staging, which determines the surgical approach and need for neoadjuvant/adjuvant therapy. Important prognostic factors include the circumferential resection margin (CRM), T and N stages, and extent of local invasion. Postoperative MRI to assess the extent of tumor recurrence enables early resection, which can greatly prolong survival. MRI criteria for local recurrence include T2 hyperintensity, early dynamic rim enhancement, and nodular morphology. Future research in MRI of rectal cancer is geared toward developing optimal imaging techniques including high-resolution MRI, whole-body scans, and parallel imaging; imaging of lymph nodes by MR lymphography; and response to therapy using diffusion/perfusion- weighted MR and functional imaging.
AB - Magnetic resonance imaging (MRI)is a useful modality for the evaluation of rectal cancer, providing superior anatomic/pathologic visualization when compared with endorectal ultrasound (EUS) and computed tomography (CT). Preoperative MRI is useful for tissue characterization and tumor staging, which determines the surgical approach and need for neoadjuvant/adjuvant therapy. Important prognostic factors include the circumferential resection margin (CRM), T and N stages, and extent of local invasion. Postoperative MRI to assess the extent of tumor recurrence enables early resection, which can greatly prolong survival. MRI criteria for local recurrence include T2 hyperintensity, early dynamic rim enhancement, and nodular morphology. Future research in MRI of rectal cancer is geared toward developing optimal imaging techniques including high-resolution MRI, whole-body scans, and parallel imaging; imaging of lymph nodes by MR lymphography; and response to therapy using diffusion/perfusion- weighted MR and functional imaging.
KW - Magnetic resonance
KW - Postoperative
KW - Preoperative
KW - Rectal cancer
KW - Recurrence
UR - http://www.scopus.com/inward/record.url?scp=47549100178&partnerID=8YFLogxK
U2 - 10.1055/s-2008-1080997
DO - 10.1055/s-2008-1080997
M3 - Review article
C2 - 20011416
AN - SCOPUS:47549100178
SN - 1531-0043
VL - 21
SP - 178
EP - 187
JO - Clinics in Colon and Rectal Surgery
JF - Clinics in Colon and Rectal Surgery
IS - 3
ER -