Transrectal ultrasound-guided biopsy for verification of lymph-node metastasis in rectal cancer. Case report.

Mesorectal lymph-node involvement in rectal cancer may be detected by endosonography as a hypoechoic lesion, but false positives are a problem. We report a new method, using transrectal ultrasound-guided core biopsy, for verifying metastatic growth in a mesorectal lymph node detected by endosonography at postoperative follow-up for low rectal cancer.