Fig. 1From: Value of transrectal ultrasound-guided biopsy in endoscopy negative biopsy patients with rectal lesions(a) A neuroendocrine neoplasm located in the lower rectum in a 51-year-old man. (b) The tumor showed abundant vascular on color Doppler image; (c) the tumor presented hyper-enhanced on contrast-enhanced condition, and there was no necrosis area in the tumor. (d) The biopsy needle (arrow) passes through the tumor center to acquire biopsy samplesBack to article page