Journals / Ulusal Cerrahi Dergisi / 2007 / Cilt: 23 - Sayı: 2

Mgnetic resonance in rectal cancer petients before total mesorectal excision:Efficacy of MR imaging with bodycoil,smal FOV and thin section parameters

Rektum kanserlerinde tıtal mezorektal eksizyon öncesi magnetik rezonans ile evreleme:Beden sargısı,dar görüntüleme alanı ve ince kesit MR yönteminin etkinliği

Pages
44–53
DOI
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AI Summary & Key Takeaways

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⚡ TL;DR(Too Long; Didn't Read)

To provide rectal distension with saline was useful for distinguishing stage T2 and T3 tumors.

📌 3 Key Takeaways

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Objective & Hypothesis:Purpose: To evaluate the efficacy of thin slice and small FOV MRI technique using body coil, performed after distending the rectum with saline solution in the preoperative staging of rectum cancer.
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Key Findings & Data:Materials and Methods: MR imaging of 36 patients with rectum cancer was done by distending the rectum with saline solution, using body coil, with thin slices and small FOV parameters.
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Conclusion & Impact:To provide rectal distension with saline was useful for distinguishing stage T2 and T3 tumors.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Purpose: To evaluate the efficacy of thin slice and small FOV MRI technique using body coil, performed after distending the rectum with saline solution in the preoperative staging of rectum cancer. Materials and Methods: MR imaging of 36 patients with rectum cancer was done by distending the rectum with saline solution, using body coil, with thin slices and small FOV parameters. MR staging was done according to the TNM system by consensus of two radiologists using the MR findings of local tumoral invasion, distance to the mesorectal fascia and involvement of local and distant lymph nodes. 12 patients who weren't operated were excluded from the study. 24 patients (13 men, 11 women) who underwent operation with total mesorectal excision technique were included in the study. Histopathologic staging of 24 patients were T1,2 and 3 in 2, 10 and 12; and N0,1 and 2 in 13, 7 and 4 patients, respectively. Comparing MR staging results with the histologic staging, sensitivity, specificity, accuracy and predictive values of the MR technique were determined. Results: The accuracy of the MRI for determining the T and N stages was 70.8% (17/24) and 58.3% (14/24), respectively. In T staging, accuracy of MR for stages T1, 2 and 3 were 100% (2/2), 70% (7/10) and 66.7 % (8/12), respectively. For stages N0, 1 and 2, accuracy of MR was 53.7% (7/13), 85.7% (6/7) and 25% (1/4), respectively. In determining the T stage, overstaging and understaging rates were 12.5% (3/24) and 16.7% (4/24), respectively. For lymph node involvement sensitivity, specificity, positive predictive value (PPV) and the negative predictive value (NPV) were 90.9% (10/11), 53.8% (7/13), 62.5% (10/16) and 87.5% (7/8), respectively. For determination of tumor deposits accuracy, sensitivity, specificity and NPV were 83.3% (20/24), 20% (1/5), 100% (19/19) and 82.6% (19/23), respectively. Accuracy for the distance to the mesorectal fascia in T3 tumors was 75% (6/8). Accuracy of circumferential resection margin was 66.7% (4/6) and 100% (2/2) in patients with a positive and negative margin, respectively. Conclusion: The small FOV and thin section MR technique using body coil was efficient in staging of rectal cancers. To provide rectal distension with saline was useful for distinguishing stage T2 and T3 tumors.

Özet

Amaç: Rektum kanserlerinin evrelemesinde rektum serum fizyolojik ile doldurularak beden sargısıyla, ince kesit ve dar görüntüleme alanı (FOV) yöntemiyle yapılan MR incelemesinin etkinliğini araştırmak. Yöntem: Rektum kanseri tanılı 36 hastaya rektumu serum fizyolojik ile doldurup, beden sargısı kullanarak ince kesit ve dar FOV ile MR incelemesi yapıldı. İnceleme sonuçları tümörün yerel uzanımı, mezorektal fasyaya uzaklığı ve bölgesel ve uzak lenf düğümü tutulumları yönünden değerlendirilerek iki radyologun fikir birliğiyle TNM sistemine göre evrelendi. Ameliyat olmayan 12 hasta çalışma dışı bırakıldı. Total mezorektal eksizyon tekniği ile ameliyat edilen 24 hasta (13 erkek, 11 kadın) çalışmaya alındı. Histopatolojik olarak 24 hastanın 2, 10 ve 12'si sırasıyla T1,2 ve 3. evrelerde; 13, 7 ve 4'ü N0,1 ve 2. evrelerde idi. MR evreleme bulguları histopatolojik evre ile karşılaştırılarak yöntemin duyarlılık, özgüllük, doğruluk ve öngörü değerleri belirlendi. Bulgular: T ve N evrelemesi için doğruluk sırasıyla %70.8 (17/24) ve %58.3 (14/24) bulundu. T1,2,3 evreleri için doğruluk sırasıyla %100 (2/2), %70 (7/10) ve %66.7 (8/12)'dir. N0,1 ve 2 evreleri için doğruluk sırasıyla %53.7 (7/13), %85.7 (6/7) ve %25 (1/4)'tir. Tümör evrelemesinde yanlış ileri evreleme oranı %12.5 (3/24), yanlış geri evreleme oranı %16.7 (4/24)'dir. Lenf düğümü tutulumunu belirlemede duyarlılık %90.9 (10/11), özgüllük %53.8 (7/13), pozitif öngörü değeri %62.5 (10/16) ve negatif öngörü değeri %87.5 (7/8)'tur. Tümör depoziti belirlemede doğruluk %83.3 (20/24), duyarlılık %20 (1/5), özgüllük %100 (19/19), negatif öngörü değeri %82.6 (19/23)'dır. T3 tümörlerde mezorektal fasyaya olan uzaklık için doğruluk %75 (6/8)'dir. Çevresel rezeksiyon sınırı pozitif ve negatif tümörlerde doğruluk sırasıyla %66.7 (4/6) ve %100 (2/2)'dür. Sonuç: Beden sargısıyla dar FOV ve ince kesit MR yöntemi rektum kanserlerinin evrelenmesinde yeterli sonuçlar vermektedir. Serum fizyolojik ile rektal gerginliğin sağlanması T2 ve T3 evre tümörleri ayırmada yardımcıdır.

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Cite This Article

YARAN, N., ARSLAN, A., ALPONAT, A., AKANSEL, G., GÜRBÜZ, Y., İNAN, N., SARISOY, T., AKGÖZ, Y., DEMİRCİ, A. (2007). Mgnetic resonance in rectal cancer petients before total mesorectal excision:Efficacy of MR imaging with bodycoil,smal FOV and thin section parameters. Ulusal Cerrahi Dergisi, Cilt: 23 - Sayı: 2, 44–53. https://ajindex.com/articles/325578

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