Objective:

To investigate and summarize the ultrasonic and CT manifestations of low-grade appendiceal mucinous neoplasm (LAMN).

Methods:

The ultrasonic and CT images of 12 LAMN cases confirmed by surgery and pathology were retrospectively analyzed

and the characteristics including tumor location

size

shape

border

internal structure

blood supply and relationship with the surrounding tissues were summarized.

Results:

Ultrasonic images were divided into three types: blind tubular type in 2 cases (16.7%)

mainly cystic mass type in 7 cases (58.3%)

and mainly solid mass type in 3 cases (25%). While CT images were divided into two types: cyst

ic mass type in 9 cases (75%) and irregular mass type in 3 cases (25%).

Conclusions:

Ultrasonic and CT manifestations of LAMN have certain characteristics. Full understanding of the ultrasonic and CT manifestations of this disease could reduce misdiagnosis and missed diagnosis.