Significance of CT in the detection of regional lymph node metastases in colorectal carcinoma

For preoperative staging of colorectal cancer a CT scan is frequently performed. This report examines the sensitivity of CT for regional lymph node metastasis of colorectal cancer using different criteria. Preoperative CT scans of 153 patients with colorectal cancer were analyzed using different cri...

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Bibliographic Details
Published in:Radiologe 1998-12, Vol.38 (12), p.1077-1082
Main Authors: Gomille, T, Aleksic, M, Ulrich, B, Christ, F
Format: Article
Language:ger
Subjects:
Aged
Colonic Polyps - surgery
Colorectal Neoplasms - surgery
Evaluation Studies as Topic
Female
Humans
Lymph Node Excision
Lymph Nodes - pathology
Lymphatic Metastasis - diagnostic imaging
Lymphatic Metastasis - pathology
Male
Middle Aged
Rectal Neoplasms - surgery
Sensitivity and Specificity
Tomography, X-Ray Computed - methods
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Summary:For preoperative staging of colorectal cancer a CT scan is frequently performed. This report examines the sensitivity of CT for regional lymph node metastasis of colorectal cancer using different criteria. Preoperative CT scans of 153 patients with colorectal cancer were analyzed using different criteria for N1. The results were then compared to the postoperative histological findings. For N1 = lymph nodes (LN) > 1 cm the sensitivity was 47%. For N1 = LN > 1 cm or an increased number of LN < 1 cm the sensitivity was 71%. In patients with a primary tumor seen on CT, sensitivity rose to 87%. Evidence of regional nodal metastatic disease is only relevant for rectal cancer, colon polyps, and for locally excised tumors when considering present surgical concepts for the treatment of colorectal cancer. In these cases CT analysis using the broadened criteria for N1 proposes a valuable argument regarding possible preoperative radiotherapy or an operative revision.
ISSN:0033-832X