Intra-Appendiceal Air at CT: Is It a Useful or a Confusing Sign for the Diagnosis of Acute Appendicitis?
Korean Journal of Radiology
;
: 39-46, 2016.
Artigo
em Inglês
| WPRIM
| ID: wpr-222275
ABSTRACT
OBJECTIVE:
To investigate the significance of intra-appendiceal air at CT for the evaluation of appendicitis. MATERIALS ANDMETHODS:
We retrospectively analyzed 458 patients (216 men, 242 women; age range, 18-91 years) who underwent CT for suspected appendicitis. Two independent readers reviewed the CT. Prevalence, amount, and appearance of intra-appendiceal air were assessed and compared between the patients with and without appendicitis. Performance of CT diagnosis was evaluated in two reading strategies once ignoring appendiceal air (strategy 1), and the other time considering presence of appendiceal air as indicative of no appendicitis in otherwise indeterminate cases (strategy 2), using receiver operating characteristic (ROC) analysis.RESULTS:
Of the 458 patients, 102 had confirmed appendicitis. The prevalence of intra-appendiceal air was significantly different between patients with (13.2%) and without (79.8%) appendicitis (p < 0.001). The amount of appendiceal air was significantly lesser in patients having appendicitis as compared with the normal group, for both reader 1 (p = 0.011) and reader 2 (p = 0.002). Stool-like appearance and air-fluid levels were more common in the appendicitis group than in the normal appendix for both readers (p < 0.05). Areas under the ROC curves were not significantly different between strategies 1 and 2 in reader 1 (0.971 vs. 0.985, respectively; p = 0.056), but showed a small difference in reader 2 (0.969 vs. 0.986, respectively; p = 0.042).CONCLUSION:
Although significant differences were seen in the prevalence, amount, and appearance of intra-appendiceal air between patients with and without appendicitis, it has a limited incremental value for the diagnosis of acute appendicitis.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Apendicite
/
Apêndice
/
Tomografia Computadorizada por Raios X
/
Doença Aguda
/
Prevalência
/
Estudos Retrospectivos
/
Curva ROC
Tipo de estudo:
Estudo diagnóstico
/
Estudo observacional
/
Estudo de prevalência
/
Estudo prognóstico
Limite:
Adolescente
/
Adulto
/
Idoso
/
Aged80
/
Feminino
/
Humanos
/
Masculino
Idioma:
Inglês
Revista:
Korean Journal of Radiology
Ano de publicação:
2016
Tipo de documento:
Artigo
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