关键词:

肠粪石, 肠梗阻, 磁共振成像, 诊断

Abstract:

Objective　To explore the MRI features and imaging mechanism of intestinal fecalith at different locations, and to raise the diagnosis accuracy rate of intestinal fecalith. Methods　A total of 23 cases of intestinal fecalith (including 13 males and 10 females, with a median age of 67 years old, 20 cases in the small intestine and 3 cases in the colon) underwent MRI examinations in Laiyang Central Hospital of Yantai from March 2016 to August 2022. The MRI features (T1WI and T2WI) of intestinal fecalith were summed up and analyzed combined with intraoperative findings. Results　All 23 cases of intestinal fecalith showed "coke" sign (irregular low signal) on T2WI. The signals on T1WI showed as follows: (1) characteristic "empty shell" sign (internal low signal and peripheral ringlike high signal) in 14 cases, of which 13 cases were located in the small intestine and 1 case was located in the flexura hepatica coli; (2) mixed slightly high signal in 5 cases, all located in the small intestine (4 cases in the jejunum and 1 case in the ileum); (3) homogeneous low signal in 4 cases, 2 cases in the small intestine and 2 cases in the left hemicolon. Conclusions　Intestinal fecalith at different locations show "coke" sign on T2WI. The signals on T1WI are complex and diverse, and are often manifested by "empty shell" sign. It is useful to reduce the misdiagnosis and missed diagnosis by fully recognizing MRI features of intestinal fecalith.

Key words:

Intestinal fecalith, Intestinal obstruction, Magnetic resonance imaging, Diagnosis