The Diagnostic Value of Virtual Colonoscopy in Colonic Diseases

Abstract

Aim: This study aims to assess the diagnostic accuracy of multi-slice computed tomography (CT) colonography in detecting colorectal lesions. Material and Methods: 22 patients with confirmed or clinically suspected colorectal pathology underwent multi-slice CT colonography followed by conventional colonoscopy on the same day. The diagnostic findings of multi-slice CT colonography were compared with those obtained from conventional colonoscopy. Results: Of 22 patients who underwent CT colonography, 10 (45%) were evaluated as normal. Bowel wall thickening was observed in 4 patients (18%), while polypoid lesions were detected in 8 (36%). Among the 9 polypoid lesions identified through conventional colonoscopy, 8 were also detected by CT colonography. The overall sensitivity of CT colonography for polypoid lesions, regardless of size, was 89%. Sensitivity was 50% for lesions smaller than 1 cm and 100% for lesions larger than 1 cm. When polypoid lesions were evaluated according to their histology, the sensitivity of CT Colonography was found to be 50% in tubular adenoma, 100% in tubulovillous adenoma, and 100% in adenocarcinoma. Conclusion: The sensitivity of CT colonography for detecting colorectal polypoid lesions was found to be 89%. These results indicate that CT colonography is a valuable diagnostic modality for comprehensive evaluation of the colon. CT colonography represents a viable alternative to traditional colorectal cancer screening methods due to its high sensitivity for detecting colorectal lesions, coupled with its relatively safe and minimally invasive nature.

Keywords

• Computed Tomography Colonography
• Colonoscopy
• Colonic Polyp
• Colorectal Neoplasms

Kolon Hastalıklarında Sanal Kolonoskopinin Tanısal Değeri

Abstract

Amaç: Çok kesitli bilgisayarlı tomografi (BT) kolonografinin kolorektal lezyonların görülmesindeki ve ek bulguların araştırılmasındaki etkinliğini değerlendirmektir. Gereç ve Yöntemler: Kolorektal patolojisi olan veya klinik olarak şüphelenilen 22 hastaya aynı gün BT kolonografi sonra konvansiyonel kolonoskopi incelemesi yapıldı. Çok kesitli BT kolonografi, konvansiyonel kolonoskopi sonuçları karşılaştırıldı. Bulgular: BT kolonografi de 22 hastanın 10 tanesi (%45) normal olarak değerlendirildi. Dört hastada (%18) barsak duvarında kalınlaşma, 8 hastada (%36) polipoid lezyon saptandı. Konvansiyonel kolonoskopi de saptanan 9 polipoid lezyonun 8 tanesi BT kolonografi de saptandı. Boyut farkı gözetmeksizin tüm polipoid lezyonlarda BT kolonografinin duyarlılığı %89, 1 cm’den küçük polipoid lezyonlarda %50, 1 cm’den büyük polipoid lezyonlarda %100 bulundu. Sonuç: BT kolonografisinin kolorektal polipoid lezyonları tespit etme duyarlılığı %89 olarak bulundu. Bu sonuçlar BT kolonografisinin kolonun kapsamlı değerlendirilmesi için değerli bir tanı yöntemi olduğunu göstermektedir. BT kolonografisi, kolorektal lezyonları tespit etmedeki yüksek duyarlılığı ve nispeten güvenli ve minimal invaziv yapısı nedeniyle geleneksel kolorektal kanser tarama yöntemlerine uygulanabilir bir alternatif sunmaktadır.

Keywords

• Bilgisayarlı Tomografi Kolonografi
• Kolonoskopi
• Kolon Polip
• Kolorektal Neoplazmalar

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