Computed tomographic evaluation and staging of cecal carcinoma

Area of Science:

• Oncology
• Radiology
• Gastroenterology

Background:

• Primary adenocarcinoma of the cecum requires accurate staging for effective treatment planning.
• Computed tomography (CT) is a common preoperative imaging modality for assessing gastrointestinal cancers.

Purpose of the Study:

• To evaluate the clinical presentation, CT findings, and accuracy of CT staging for primary adenocarcinoma of the cecum.
• To assess the value of preoperative CT scans in determining tumor invasion and lymph node metastasis.

Main Methods:

• Review of preoperative computed tomographic (CT) scans from 14 patients with biopsy-proven primary adenocarcinoma of the cecum.
• Correlation of CT findings with histopathology, focusing on tumor invasion beyond the bowel wall and nodal involvement.
• Assessment of CT tumor staging accuracy compared to final pathological staging.

Main Results:

• CT showed a sensitivity of 78% for detecting tumor invasion beyond the bowel wall, with a negative predictive value of 33%.
• CT demonstrated low sensitivity (12%) and a negative predictive value of 22% for detecting metastatic nodal involvement, with key nodal chains often not discernible.
• CT tumor staging accuracy was 57%, with 43% of cases being upgraded, indicating underestimation of disease extent.

Conclusions:

• Preoperative CT scans for cecal adenocarcinoma have limitations in accurately staging disease extent, particularly regarding lymph node metastasis.
• CT tends to underestimate the true extent of disease, despite high predictive values for positive findings.
• The study highlights the need for improved imaging or complementary diagnostic methods for comprehensive staging of cecal adenocarcinoma.