CT diagnosis and differential diagnosis of benignity and malignancy of appendiceal mucocele
10.3969/j.issn.1002-1671.2017.04.015
- VernacularTitle:阑尾黏液囊肿的CT诊断及良恶性鉴别
- Author:
Xuemei QI
;
Jie HUANG
;
Changhu LIANG
- Keywords:
appendix;
mucocele;
computed tomography
- From:
Journal of Practical Radiology
2017;33(4):545-549
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the CT manifestations and differential diagnosis of benignity and malignancy of appendiceal mucocele.Methods The clinical and imaging data of 31 pathologically confirmed appendiceal mucocele were analyzed retrospectively,in which simple mucocele and mucinous cystadenoma were devided into benign group;low grade appendiceal mucinous neoplasm(LAMN) was devided into borderline group;mucinous cystadenocarcinoma was devided into malignant group.The CT manifestations were analyzed and compared statisticallyl in size(long diameter and short diameter), cyst wall(thickness, evenness, smoothness), intra-cystic contents(mural nodules, septum, calcification, intra-cystic fliud density), periappendiceal fat stranding, intraperitoneal free fluid and pseudomyxoma peritonei.Sensitivity and specificity values were calculated if single or multiple CT manifestations were used.Results Of the 31 cases of mucocele of the appendix, 11 of them were in benign group (including 8 cases of simple mucocele and 3 cases of mucinous cystadenoma);14 cases in borderline group (LAMN) and 6 cases in malignant group (mucinous cystadenocarcinoma).CT findings including evenness and smoothness of cyst wall, mural nodule, intraperitoneal free fluid and pseudomyxoma peritonei showed statistically significant difference among three groups (P<0.05).When combined with any four of the five signs, the sensitivity and specificity for diagnosing malignant mucocele were 83% and 88% respectively.But no significantly difference were found among the three groups(P>0.05) in long diameter and short diameter of mucocele, attenuation of intraluminal contents, maximal wall thickness, calcifications, internal septa and periappendiceal fat stranding.
