Journals / Bakırköy Tıp Dergisi / 2014 / Cilt: 10 - Sayı: 2

Computed tomography vs histopathologic staging in larynx cancer: reasons of failure in CT staging

Larinks Kanserinde Bilgisayarlı Tomografi ile Histopatolojik Evrelemenin Karşılaştırması: Bt Evrelemede Başarısızlık

Pages
62–66
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

In advanced stages the probable misdiagnosis of paraglottic space or cartilage invasion is the cause of understaging

📌 3 Key Takeaways

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Objective & Hypothesis:Objective: The aim of the study is the determination of the accuracy of preoperative CT findings for larynx cancer and the reasons for false negatives and false positives regarding to the histopathological results.
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Key Findings & Data:Material and methods: Preoperatively 94 patients were diagnosed with larynx cancer by biopsy.
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Conclusion & Impact:In advanced stages the probable misdiagnosis of paraglottic space or cartilage invasion is the cause of understaging
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Objective: The aim of the study is the determination of the accuracy of preoperative CT findings for larynx cancer and the reasons for false negatives and false positives regarding to the histopathological results. Material and methods: Preoperatively 94 patients were diagnosed with larynx cancer by biopsy. All patients were evaluated preoperatively with single detector CT and then operated. The pathology results were accepted as a reference method. Latest TNM scoring system was used for the CT staging. Results: Squamous cell carcinoma was confirmed in 92 of the patients, adenoid cystic carcinoma in 1 of the patients, and chondrosarcoma in one patient. The most common tumor was found transglottic (46.8%) and the least detected was the subglottic (1.1%). The anatomic level of the tumor in the CT was correctly detected in 37 of 44 patients (84%). The accuracy of the preepiglottic, the anterior commissur, and the subglottic extension and cartilage invasions were evaluated as 75%, 74%, 76% and 82% respectively. The histopathologic and CT results correlation was significantly positive in the advanced tumors (grade 3-4) (&#954;=0.4784, p<0.001). The lymph node invasion determination rate was found high. The TNM staging with CT was more successful for the advanced tumors (&#954;=0.465, p<0.001) Conclusion: The large and expansive transglottic tumors deteriorate the correct grading. While there is a higher grading accuracy in advanced nontransglottic tumors, in early stages the probable cause of overstaging depends on the peritumoral inflamation making the tumor appearance bigger. In advanced stages the probable misdiagnosis of paraglottic space or cartilage invasion is the cause of understaging

Özet

Amaç: Larinks kanserlerinin preoperatif bilgisayarlı tomografik (BT) evrelemesinin, histopatolojik evreleme referans yöntem alınarak, doğruluk oranlarının saptanması, yanlış pozitif ve yanlış negatifliğin nedenlerinin araştırılması Gereç ve Yöntem: Cerrahi öncesi biyopsi ile larinks kanseri tanısı alan 94 hastaya cerrahi öncesi tek dedektörlü BT ile larinks BT çekilmiştir. Tümü opere olan olguların patoloji sonuçları referans yöntem olarak kabul edilip son sürüm TNM evreleme sistemine göre BT evrelemesi yapılmıştır. Bulgular: Doksan iki hastada yassı epitel hücreli kanser, 1 hastada adenoid kistik kanser ve 1 hastada ise kondrosarkom saptanmıştır. En sık transglottik tümöre (%46.8), en az subglottik tümöre (%1.1) rastlanmıştır. Tümörün yerleştiği anatomik seviye BT’de 44 hastanın 37’sinde (%84) doğru tespit edilmiştir (κ=0.458, p<0.001). Preepiglottik tutulum, anterior komissür tutulumu, subglottik uzanım ve tiroid kıkırdak invazyonunun doğruluk oranları sırasıyla %75, 74, 76 ve 82’dir. İleri evre tümörlerde BT-patoloji uyumu daha yüksektir (κ=0.4784, p<0.001). Lenf invazyonu açısından başarı yüksektir (κ=0.945, p<0.001). TNM evrelemesinde ise yüksek evrelerde uyum daha yüksektir (κ=0.465, p<0.001). Sonuç: Büyük ve yaygın transglottik tümörler doğru evrelendirmeyi güçleştirmektedir. Transglottik yerleşim dışındaki ileri evre tümörlerde daha yüksek oranda doğru evrelendirme yapılırken erken evrelerde muhtemelen tümör çevresindeki inflamasyon tümörü olduğundan daha büyük göstermekte ve buna bağlı olarak bir üst evrelendirme yapılmaktadır. İleri evrelerde ise, muhtemelen paraglottik alan veya kıkırdak invazyonun atlanmasına bağlı olarak tümör bir alt evre olarak tanımlanmaktadır.

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Cite This Article

KALIN, S., TOPRAK, U., YILMAZ, P. D., ZENGİN, B., ERDOĞAN, A., ALTIN, L., KARADEMİR, M. A. (2014). Computed tomography vs histopathologic staging in larynx cancer: reasons of failure in CT staging. Bakırköy Tıp Dergisi, Cilt: 10 - Sayı: 2, 62–66. https://ajindex.com/articles/125408

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