Table 4. Preoperative imaging modalities and radiological–pathological concordance.

Radiological–pathological concordance was defined as agreement between the principal preoperative radiological diagnosis documented in the clinical record and the final operative and histopathological diagnosis. Because of the retrospective observational design, these values represent diagnostic concordance rather than formal measures of diagnostic accuracy, sensitivity, or specificity.

Investigation	Performed, n (%)	Concordant with final diagnosis, n (%)
Ultrasound	29 (85.3)	44.8
Contrast CT	34 (100)	91.2
MRI enterography	5 (14.7)	80.0
Upper gastrointestinal endoscopy	12 (35.3)	25.0
Colonoscopy	7 (20.6)	57.1
Tumor markers	8 (23.5)	75.0