[The value of spiral computed tomography in diagnosis of adult intussusception].
OBJECTIVE
To evaluate the value of spiral computed tomography (CT) in diagnosis of adult intussusception.


METHODS
Sixty-eight patients with adult intussusception, 42 males and 28 females, aged 52.5 (30-82), with the course of 3 days-13 months, underwent plain CT scanning and biphase CT enhanced scanning of the abdomen. Operation was performed later.


RESULTS
Sixty-six of the 68 patients (97.1%) were diagnosed as with intussusception by spiral CT. Direct signs of intussusception were shown in 66 patients: concentric circle sign in 66 cases, vessel involvement in 61 cases, and fat sign in 58 cases. And main indirect signs were shown in 19 cases: ring sign in 19 cases, ileus sign in 24 cases, and ascitic fluid sign in 4 cases. Other signs included mesenteric infiltration in 4 cases and retroperitoneal lymphadenectasis in 8 cases. Operation performed later showed an accurate rate of etiological diagnosis of intussusception by CT of 72.1%.


CONCLUSIONS
Spiral CT has important value in diagnosis of adult intussusception and its etiology. The specific signs to diagnose adult intussusception are concentric circle sign, vessel involvement and fat sign.
Department of Radiology, Sir Run Run Shaw Hospital Affiliated to Zhejiang University, Hangzhou 310016, China.
Jian-song
JS
Ji
Shi-zheng
SZ
Zhang
Chu-xiao
CX
Shao
Jian
J
He
Su-su
SS
Xie
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D007443:Intussusception / Q000175:diagnosis / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D012189:Retrospective Studies; D012680:Sensitivity and Specificity; D036542:Tomography, Spiral Computed / Q000379:methods*