Subject(s)
Pneumatosis Cystoides Intestinalis/diagnosis , Colonoscopy , Female , Humans , Middle AgedSubject(s)
Female , Humans , Middle Aged , Pneumatosis Cystoides Intestinalis/diagnosis , ColonoscopyABSTRACT
BACKGROUND AND STUDY AIMS: Magnifying colonoscopy (MC) is recognized as an aid to the differential diagnosis between neoplastic and nonneoplastic lesions. This study evaluated interobserver agreement of experienced endoscopists in the assessment of colonic pit patterns through the Kudo's classification and correlated morphological aspects with histopathological findings. MATERIALS AND METHODS: A total of 213 magnification chromoendoscopic pictures of colonic lesions were collected from 161 consecutive patients and presented to three independent observers who expressed opinion about predominant pit pattern. All lesions were excised and sent for histopathological study. RESULTS: Kappa statistics showed that the general agreement index with respect to the aspects of the pits was good among the three observers (0.561). Regarding prediction of histopathology according to the pit pattern diagnosis, overall accuracy was 84%, sensitivity was 91.4%, specificity was 67.2%, positive predictive value was 86.6%, and negative predictive value was 79.3%. CONCLUSION: Although the interobserver reproducibility of the colonic pit pattern is good for experienced endoscopists, MC must not be used to replace the histopathological analysis, since it does not differentiate with the necessary safety neoplastic from nonneoplastic lesions.
Subject(s)
Colon/pathology , Colonoscopy/methods , Female , Humans , Male , Middle Aged , Observer Variation , Predictive Value of Tests , Sensitivity and SpecificityABSTRACT
A colonoscopia com magnificação de imagem (CMI) é considerada uma técnica que possibilita o diagnóstico diferencial entre lesões colorretais neoplásicas e não-neoplásicas. Este estudo avaliou a variação da concordância interobservadores para os padrões de criptas através de três endoscopistas experientes com a classificação de Kudo, e correlacionou esses aspectos morfológicos com os achados histopatológicos. Um total de 213 imagens de lesões magnificadas (polipóides e planas) forma coletadas de 161 pacientes consecutivos e apresentadas a três observadores independentes que expressaram opinião sobre o padrão de criptas predominante. Todas as lesões foram completamente excisadas e enviadas para estudo histopatológico. A estatística estimada de Kappa mostrou que o índice de concordância geral para padrões de criptas entre os três observadores foi bom (0,561). Com relação aos resultados histapatológicos, quando comparados aos padrões de criptas, observou-se: acuária de 84 por cento; sensibilidade de 91,4 por cento; especifidade de 67,2 por cento; valor preditivo positivo de 86,6 por cento valor preditivo negativo de 79,3 por cento e índice de Kappa de 0,61. Embora a reprodutilidade interobservadores dos padrões de criptas seja boa, a CMI não deve substituir o estudo histopatológico, pois não diferencia com a necessária segurança lesões neoplásicas de lesões não-neoplásicas.
Colonoscopy with magnified view is the most reliable nonbiopsy method for distinguishing non-neoplastic from neoplastic colorectal lesions. This study analysed lhe interobserver concordance in diagnosis of pit patem, with 3 experients endoscopists using Kudo Classification and correlating the this aspects with histological ones. A total of 213 magnificated images injuries (polipoides and plain) had been collected of 161 independent observing patients consecutive and presented tres that had expressed opinion on the predominant standard of criptas. All the injuries had been completely ressected and send for histopatológico study. The analysis esteem statistics of Kappa showed that the indice of general agreement for standards of criptas between the 3 observers was 84 percent; sensitivity 91.4 percent; specificity 67.2 percent positive preditivo value 86.6 percent; negative preditivo value 79.3 percent; e index of Kappa of 0,61 percent. Although the interobserver reproduction of pit patern are good, the image for colonoscopia with magnificação, does not have to substitute the histopatologic study, therefore it does not differentiate with the necessary security neoplastic injuries of non neoplastic.