Published online Dec 16, 2023. doi: 10.4253/wjge.v15.i12.699
Peer-review started: November 10, 2023
First decision: November 21, 2023
Revised: November 25, 2023
Accepted: December 6, 2023
Article in press: December 6, 2023
Published online: December 16, 2023
Appendiceal mucinous neoplasms can present in a malignant fashion, but preoperative diagnosis of appendiceal mucinous neoplasms is difficult. Endoscopy plays an important role in the diagnosis of appendiceal mucinous neoplasms. There are limited reports regarding the endosonographic characteristics of these neoplasms.
We evaluated the imaging features of appendiceal mucinous neoplasms using endoscopic ultrasound (EUS) by curved linear-array echoendoscope.
To describe image features on endoscopic and echoendosonograhic views of appendiceal mucinous neoplasms.
The EUS characteristics and patients’ clinical data were reviewed.
The appendiceal orifice located on the surface of the lesion in 2 cases (volcano sign) and the appendiceal orifice located on the surface of the lesion with white secretion in 2 cases (atypical volcano sign) were seen. EUS showed that the lesions were submucosal cystic hypoechoic lesions with clear boundaries and no wall nodules were observed. Onion-peeling sign, which was defined as intermittent hyperechoic lines in the hypoechoic lesion, could be observed in part of cases.
This study demonstrated that we can safely evaluate the lesion in the ileocecal region by using a linear-array echoendoscope. A volcano sign on endoscopic view and EUS features could be used to diagnose appendiceal mucinous neoplasms.
In the future, for difficult colonoscopy, the safety of intubation of linear echoendoscope into cecum should be studied.