Evaluation of appendiceal mucinous neoplasms by curved linear-array echoendoscope: A preliminary study

Figure 1 Using ultrasound to scan the direction of the proximal colon to assist in inserting the endoscope. A: The direction of the proximal colon is at an acute angle; B: The direction of the proximal colon is almost at a right angle; C: The direction of the proximal colon is almost at an obtuse angle.

Figure 2 Endoscopic view of appendiceal mucinous neoplasms. A: A volcano sign that the appendiceal orifice was located on the surface of the protrusion is shown; B: An atypical volcano sign that the appendiceal orifice was located on the surface of the protrusion with white secretion is shown.

Figure 3  An onion-peeling sign with intermittent hyperechoic lines was seen in the hypoechoic lesion.