Journals / Molecular Imaging and Radionuclide Therapy / 2022 / Cilt: 31 - Sayı: 1

The Evaluation of Preoperative 18 F-FDG PET/CT in Patients with Endometrial Cancer and the Correlation Between PET Parameters and Postoperative Pathology Results

Endometriyum Kanserli Hastalarda Preoperatif 18 F-FDG PET/BT’nin Değerlendirilmesi ve PET Parametreleri ile Postoperatif Patoloji Sonuçları Arasındaki Korelasyon

Pages
16–22
Publication Date
2022-09-03
DOI
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AI Summary & Key Takeaways

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⚡ TL;DR(Too Long; Didn't Read)

Conclusion: SUV and volumetric parameters obtained from PET/CT, especially TLG, are strong predictors of tumor characteristics, such as MI and CSI, FIGO stages, and LNM, and are useful in noninvasively defining the risk groups in the preoperative period.

📌 3 Key Takeaways

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Objective & Hypothesis:Objectives: Endometrial cancer (EC) is the most common gynecological malignancy.
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Key Findings & Data:The18 fluorine-fluorodeoxyglucose (18 F-FDG) positron emission tomography/computed tomography (PET/CT) is used for initial staging, evaluating treatment response, and detecting recurrence.
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Conclusion & Impact:Conclusion: SUV and volumetric parameters obtained from PET/CT, especially TLG, are strong predictors of tumor characteristics, such as MI and CSI, FIGO stages, and LNM, and are useful in noninvasively defining the risk groups in the preoperative period.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Objectives: Endometrial cancer (EC) is the most common gynecological malignancy. The18 fluorine-fluorodeoxyglucose (18 F-FDG) positron emission tomography/computed tomography (PET/CT) is used for initial staging, evaluating treatment response, and detecting recurrence. This study aimed to investigate the diagnostic value of preoperative PET/CT in EC staging and determine the volumetric PET parameters that are accurate predictors of histopathological tumor characteristics. Methods: Preoperative PET/CT data of 66 patients with EC were retrospectively analyzed. Patients were divided into low and high-risk groups according to the European Society for Medical Oncology criteria. The maximum standardized uptake value (SUVmax ), SUVmean , metabolic tumor volume (MTV), and total lesion glycolysis (TLG) of the primary lesion and pathological lymph nodes were noted. The International Federation of Gynecology and Obstetrics (FIGO) classifications, histopathology, the depth of myometrial invasion (MI), lymph node metastasis (LNM), cervical stromal invasion (CSI), and tumor sizes were noted. Results: The SUVmax , TLG, and MTV values of high and low-risk groups were significantly different. TLG was the most useful parameter in differentiating risk groups. PET/CT had 90% sensitivity, 96.3% specificity, 81.8% positive predictive value, 98.1% negative predictive value, and 95.45% accuracy in assessing LNM. MTV and TLG values in patients with non-endometrioid pathology were higher than those with endometrioid. The SUVmax , MTV, and TLG of patients with deep MI were higher than those with superficial MI. TLG values of patients with CSI were higher than those without CSI. Patients with LNM had higher MTV and TLG values than those without LNM. A significant difference was found in TLG, MTV, and SUVmax values between patients with FIGO stage I-II and patients with FIGO stage III and above. Conclusion: SUV and volumetric parameters obtained from PET/CT, especially TLG, are strong predictors of tumor characteristics, such as MI and CSI, FIGO stages, and LNM, and are useful in noninvasively defining the risk groups in the preoperative period.

Özet

Amaç: Endometriyum kanserleri (EK) en sık görülen kadın genital sistemi malignitesidir. 18 Flor-florodeoksiglukoz (18 F-FDG) ile işaretli pozitron emisyon tomografisi/bilgisayarlı tomografi (PET/BT), EK’lerinde evreleme, tedavi yanıtının değerlendirilmesi ve nüks hastalığın belirlenmesi amacıyla sıkça kullanılmaktadır. Çalışmamızın amacı EK’lerinde preoperatif dönemde evreleme amaçlı yapılan PET/BT parametreleri ile postoperatif patoloji sonuçları arasındaki korelasyonun araştırılmasıdır. Yöntem: Preoperatif evreleme amaçlı PET/BT çekimi yapılan 66 EK tanılı hasta çalışmaya dahil edildi. 18 F-FDG PET/BT çalışmalarında primer lezyonların ve patolojik lenf nodlarının maksimum standardize alım değeri (SUVmaks ), SUVmean , metabolik tümör hacmi (MTV) ve toplam lezyon glikoliz (TLG) değerleri ölçüldü. Postoperatif patoloji sonuçlarından Uluslararası Jinekoloji ve Obstetrik Federasyonu (FIGO) sınıflandırmaları, tümörlerin histolojik tipleri, myometrial invazyon derinlikleri (Mİ), maksimum tümör çapları, servikal stromal invazyonları ve lenf nodu metastaz bulguları kaydedildi. Bulgular: Yüksek ve düşük riskli hasta grupları arasında TLG, MTV ve SUVmaks değerlerinde istatistiksel olarak anlamlı farklılık izlenirken, SUVmean ’de anlamlı fark mevcut değildi. Risk gruplarını ayırt etme gücü en yüksek olan parametre TLG olarak belirlendi.18 F-FDG PET/BT’nin lenf nodu saptamada duyarlılığı %90; özgüllüğü %96,43, pozitif prediktif değeri %81,81, negatif prediktif değeri %98,18 ve doğruluğu %95,45 olarak hesaplandı. Non- endometrioid tümör tanılı hastalarda MTV ve TLG değerleri endometrioid tipe göre anlamlı yüksek saptandı. Mİ >1/2 olan hastalarda primer tümör SUVmaks , MTV ve TLG değerleri Mİ <1/2 olan gruba göre anlamlı düzeyde yüksekti. Servikal stromal invazyon izlenen hastalarda TLG değerleri, invazyon izlenmeyen gruba göre anlamlı düzeyde yüksekti. Histopatolojik olarak lenf nodu metastazı olan hastalarda primer tümörden elde edilen MTV ve TLG değerleri, lenf nodu metastazı olmayan hastalara göre daha yüksek düzeydeydi. FIGO I-II olan hastalar ile FIGO III ve üstü olan hastalar arasında TLG, MTV ve SUVmaks değerlerinde anlamlı farklılık izlendi. Sonuç: 18 F-FDG PET/BT; TLG başta olmak üzere SUV ve volumetrik parametreleri sayesinde preoperatif dönemde tümöre ait myometrial invazyon, servikal stromal invazyon, FIGO evresi, lenf nodu metastazları gibi histopatolojik özellikleri ön görebilmeyi ve bu dönemde risk gruplarının da belirlenmesini sağlayabilecek önemli bir noninvaziv yöntemdir.

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Cite This Article

Topuz, Ö. V., Tamam, M. Ö., Aksu, A., Tokgözoğlu, N., Erinç, S. R. (2022). The Evaluation of Preoperative 18 F-FDG PET/CT in Patients with Endometrial Cancer and the Correlation Between PET Parameters and Postoperative Pathology Results. Molecular Imaging and Radionuclide Therapy, Cilt: 31 - Sayı: 1, 16–22. https://ajindex.com/articles/425681

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