MRI diagnosis and staging of rectal carcinoma

Interpretation of Magnetic Resonance Imaging for Locally Advanced Rectal Carcinoma After Preoperative Chemoradiation Therapy

“…As technical refinements in MRI such as endorectal coils, external body coils, and further development of phased array coils improved resolution, the accuracy rate for rectal wall invasion improved to 66 to 95 percent and to 63 to 95 percent for nodal staging. [17][18][19][20][21][22][23] However, the discrepancy between staging by imaging and by histopathology is increasing in cases of rectal carcinoma treated with preoperative CRT. 24,25 In our study, the accuracy of MRI staging for rectal cancer after preoperative CRT was 47 percent accurate for T staging and 64 percent accurate for N staging.…”

Accuracy of endorectal ultrasound after preoperative radiochemotherapy in locally advanced rectal cancer

“…Further evaluation and development of imaging techniques such as magnetic resonance imaging (MRI) using an endorectal coil did result in a high image resolution, but experience with those techniques remain limited [28,37].…”

Restaging of Locally Advanced Carcinoma of the Rectum with MR Imaging after Preoperative Radio-Chemotherapy plus Regional Hyperthermia

“…The majority of published data focuses on previously untreated carcinoma [4,9,12,17,19,28,35]. Preoperative treatment regimens are of growing interest in various locally advanced tumor diseases, and in particular for rectal cancer.…”

“…Best results have been achieved for conventional MRI in differentiating tumor stages T3 and T4 [29], and by use of endorectal coils in the classification of infiltration depth (T1/2 vs T3) [19]. Better applicators maximize the signalto-noise ratio and thus allow improved spatial resolution within a restricted field of view [9,12,17,19,35]. Limitations of endorectal MR imaging arise from stenotic and proximal tumors.…”