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Fig. 1. —Sonographically guided 18-gauge core biopsy in 53-year-old woman with metastasis to ascending colon from gastric cancer. Transverse sonogram of ascending colon shows diffusely thickened wall. Note optimal placement of 18-gauge core biopsy device with tangential approach to bowel without violation of hyperechoic narrowed lumen (open arrow). Trajectory of needle is indicated with dashed line. Tip of needle is marked with solid white arrow.