INVESTIGATION OF 18F-FDG PET / CT AND CLINICOPATHOLOGICAL DATA OF DIFFUSE TYPE GASTRIC CANCERS

Öz

Objective: One of the subtypes of stomach cancer, which is one of the leading causes of cancer-related deaths, is diffuse-type stomach cancer. In our study, it was aimed to retrospectively investigate the results of F-18-labeled fluorodeoxyglucose positron emission tomography, which is an imaging method frequently used in the diagnosis and follow-up of gastric cancer, in diffuse type gastric cancer subtypes and to review patient data in the light of the literatüre

Material and Methods: Forty-four patients diagnosed with diffuse-type gastric cancer in a single center were included in the study. Clinical, pathological and positron emission tomography data of the patients were analyzed.

Results: The mean age of the patients was 61.93. Sixteen (36.4%) of the patients were female, 28 (63.5%) were male. When the histopathological results of specimens obtained by endoscopic and surgical methods are examined, diffuse-type stomach cancer patients; 36 (81.8%) were Signet-Ring Cell, 8 (18.2%) were weak poorly cohesive type gastric cancer. Low F-18-labeled fluorodeoxyglucose involvement was observed in 8 (18.2%) patients, while high involvement was observed in 36 (81.8%). Nineteen of the patients had metastases. When SUVmax, SUVmean, metabolic tumor volume and total lesion glycolysis values were compared, a significant correlation was found between signet ring cell gastric cancers and weak cohesive type gastric cancers, and between presence and absence of metastasis (p <0.05).

Conclusion: Although SUVmax values were lower in our diffuse type gastric cancer patient series compared to other gastric cancer patients, it was observed that it was higher in advanced diffuse type gastric cancers than in early stage patients. In addition, when the diffuse type gastric cancer subtypes signet-ring cell and weak poorly cohesive type gastric cancers were compared in terms of positron emission tomography results, it was observed that there was no significant difference, and this is an information that is not available in the literature.

Anahtar Kelimeler

• Diffuse type
• Gastric cancer
• Poorly cohesive
• Signet-Ring Cell
• 18F-FDG PET/CT

Difüz Tip Gastrik Kanserlerin 18F-FDG PET/CT ve Klinikopatolojik Verilerinin İncelenmesi

Öz

Amaç: Kansere bağlı ölümlerin önde gelen nedenlerinden biri olan mide kanserinin alt tiplerinden biri de diffüz tip mide kanseridir. Çalışmamızda mide kanseri tanı ve takibinde sıklıkla kullanılan bir görüntüleme yöntemi olan F-18 ile işaretli florodeoksiglukoz Pozitron emisyon tomografisinin, diffüz tip mide kanseri alt tiplerinde sonuçlarının retrospektif olarak araştırılması ve literatür ışığında gözden geçirilmesi amaçlanmıştır.

Gereç ve Yöntemler: Çalışmaya tek merkezde diffüz tip mide kanseri tanısı konulan 44 hasta dahil edildi. Hastaların klinik, patolojik ve Pozitron emisyon tomografi verileri analiz edildi.

Bulgular: Çalışmaya alınan hastaların yaş ortalaması 61.93 idi. Hastaların 16’sı (%36.4) kadın, 28’i (%63.5) erkekti. Endoskopik ve cerrahi olarak alınan spesimenlerin histopatolojik sonuçları incelendiğinde, diffüz tip mide kanserli hastalar; 36’sı (%81.8) taşlı yüzük hücreli mide kanseri, 8’i (%18.2) zayıf kohezif tip mide kanseriydi. Hastaların 8’inde (%18.2) düşük florodeoksiglukoz tutulumu görülürken, 36 hastada (%81.8) yüksek tutulumu mevcuttu. Hastaların 19’unda metastaz vardı. SUVmax, SUVmean, metabolik tümör hacmi ve toplam lezyon glikoliz değerleri açısından karşılaştırıldığında, taşlı yüzük hücreli mide kanserleri ile zayıf kohezif tip mide kanserleri arasında ve metastaz varlığı ile yokluğu arasında anlamlı ilişki bulundu (p<0.05).

Sonuç: Diffüz tip mide kanseri hasta serimizde SUVmax değerleri diğer mide kanserli hastalara göre daha düşük olmasına rağmen ileri evre diffüz tip mide kanserlerinde erken evre olgulara göre daha yüksek olduğu gözlendi. Ayrıca diffüz tip mide kanseri alt tipleri olan taşlı yüzük hücreli mide kanserleri ile zayıf kohezif tipi mide kanserleri SUVmax, SUVmean, metabolik tümör hacmi ve toplam lezyon glikoliz değerleri açısından karşılaştırıldığında anlamlı fark saptanmadı ve bu literatürde bulamadığımız bir bilgidir.

Anahtar Kelimeler

• Diffüz tip
• Mide kanseri
• Taşlı Yüzük Hücresi
• Zayıf kohezif
• 18F-FDG PET/CT

Kaynakça

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