Resumen

SOLIS A, Lesly; PEREZ G, Raquel; IPSAN M, Osyari  y  GONZALES L, Ariel. USEFULNESS OF THE ENDORECTAL ULTRASOUND WITHOUT BALLOON IN PREOPERATIVE STAGING OF RECTAL CANCER. Rev. chil. radiol. [online]. 2009, vol.15, n.1, pp. 19-27. ISSN 0717-9308.  doi: 10.4067/S0717-93082009000100004.

Objective: To determine the usefulness of Endorectal Ultrasound (ERUS) without balloon in preo-perative staging of malignant rectal tumors. Method: From July 2003 to July 2007 a study was performed in 57 patients diagnosed with cáncer of the rectum, who underwent preoperative staging by transrectal ultrasonography to be subsequently compared with an anatomopathologic analysis ofthe surgical sample. Results: US staging according to degrees of invasión (T-stage) was coincident in 87,7 per cent with the anatomopathologic staging. Sensitivity and specifi-city valúes were 0,80 and 0,92 per cent respectively for UT2,while 0,94 and 0,81 per cent, respectively, for UT3. According to regional lymph nodes spread (N-stage), it exhibited a coincidence of 78,9 per cent; sensitivity was 0,82 per cent and specificity was 0,74 per cent for UNO; while sensitivity and specificity reached values of 0,74 and 0,82 per cent, respectively, for UN1. Conclusión: Endorectal US without balloon has proved to be useful in the preoperative staging of malignant rectal tumors.

Palabras clave : Colorectal cancer; Endorectal ultrasound without balloon; Preoperative staging.