Apporto della tomografia computerizzata e della risonanza magnetica nel bilancio preoperatorio dell'estensione del cancro del retto. Valutazione correlata con gli aspetti anatomo-patologici.

Translated title of the contribution: Computed tomography and magnetic resonance in the preoperative staging of the spread of rectal cancer. A correlation with the anatomicopathological aspects

M. Cova, F. Frezza, R. S. Pozzi-Mucelli, M. Ukmar, Z. Tarjan, M. Melato, S. Bucconi, L. Dalla Palma

Research output: Contribution to journalArticle

Abstract

In order to assess the accuracy of CT and MRI in evaluating the local extent of rectal carcinoma, 22 patients with a rectoscopic diagnosis of rectal cancer were examined before surgery with both techniques. Tumor extent into the perirectal fat, involvement of surrounding structures and local adenopathy were evaluated on both CT and MR images. These findings were compared with the micro- and macrohistologic findings obtained from the surgical specimens. As far as perirectal fat infiltration is concerned, the diagnostic accuracy of CT was 73% and that of MRI was 71%. Sensitivity was 100% for CT and 91% for MRI, while specificity was low for both techniques (45% for CT and 50% for MRI). In evaluating local adenopathy, CT accuracy was 82% and MR accuracy was 90%, with 89% sensitivity for both techniques and 77% specificity for CT and 92% for MRI. The overall accuracy was 59% for CT and 67% for MRI. In agreement with literature data, our study shows a similar accuracy for CT and MRI in evaluating the local extent of rectal carcinomas. Moreover, our results confirm the value of macrohistology in the local staging of rectal carcinoma and its prognostic value, as well as the low specificity of both CT and MRI in evaluating lesion spread into the perirectal fat.

Translated title of the contributionComputed tomography and magnetic resonance in the preoperative staging of the spread of rectal cancer. A correlation with the anatomicopathological aspects
Original languageItalian
Pages (from-to)82-89
Number of pages8
JournalRadiologia Medica
Volume87
Issue number1-2
Publication statusPublished - Jan 1994

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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