Synchronous but separate neuroendocrine tumor and high-grade dysplasia/adenoma of the gall bladder: A case report

Figure 2 Evolutionary change in gall bladder polyp. A: A 1-cm hyperechoic lesion with hypoechoic component (polyp) at the gall bladder wall (arrow); B: The polyp became larger compared to its size 1 year prior (arrow); C: The polyp became hypoechoic (arrow) after another 6 mo; D: Ultrasound performed just before surgery revealed a Doppler signal (arrowhead) within the tumor (arrow).