Meningiomlarda STAT3 Ekspresyonu ve Ki-67 ile PHH3 Arasındaki Korelasyon: Rekürrensi Öngörmek Mümkün mü?

Amaç: Bu çalışmanın amacı meningiom vakalarında PHH3 ile ki-67 proliferasyon indeksi arasındaki korelasyonu incelemek ve STAT3 ekspresyonunun mitotik aktivite, Dünya Sağlık Örgütü 2016 sınıflandırmasına göre derece ve klinikopatolojik özellikler ile ilişkisini değerlendirmektir. Gereç ve Yöntemler: Düzce Üniversitesi Tıp Fakültesi Patoloji Anabilim Dalı arşivlerinden 2012 ve 2021 yılları arasında tanı alan toplam 25 meningiom olgusu çalışmaya dahil edildi. Mitotik figür sayısının en fazla olduğu on büyük büyütme alanından mitotik sayı belirlendi. STAT3, ki-67 ve PHH3 ekspresyonunu belirlemek için formalinle sabitlenmiş, parafine gömülü doku blokları üzerinde immünohistokimyasal çalışma yapıldı. STAT3, boyama yoğunluğuna göre 0 ile 3 puan arasında puanlandı. STAT3 için boyama yüzdeleri, boyanmış hücrelerin manuel sayımı ve toplam tümör hücresi sayısı ile belirlendi. Ki-67 proliferasyon indeksi, manuel sayımla yüzde olarak belirlendi. PHH3 için her bir vakada, 10 büyük büyütme alanından immün boyanmış mitotik figürlerin toplam sayısı değerlendirildi. Bulgular: STAT3 boyama yüzdesi bakımından tümör dereceleri arasında istatistiksel olarak anlamlı bir farklılık bulundu (p=0,047). Tümör derecesi yüksek olgularda STAT3 ekspresyonu anlamlı olarak daha yüksek idi. Manuel sayım ile en yüksek mitotik indekse sahip olan alanda yüzde olarak hesaplandığında PHH3 ve ki-67 arasında orta derecede pozitif bir korelasyon olduğu bulundu (r=0,621; p=0,001). Sonuç: Ki-67, PHH3 ve STAT3'ün kombinasyon olarak kullanılması, meningiomların histopatolojik derecelendirilmesinde ve rekürrensi öngörmede faydalı bir yöntem olacaktır.

Anahtar Kelimeler:

meningioma, grade, STAT3, PHH3, ki67

STAT3 Expression and Correlation Between Ki-67 and PHH3 in Meningiomas: Is it Possible to Predict Recurrence?

Aim: The aim of this study was to investigate the correlation between PHH3 and ki-67 labeling index, and the association of STAT3 expression with mitotic index, grade by World Health Organization 2016 classification, and clinicopathological features of meningioma cases. Material and Methods: A total of 25 meningioma cases from the archives of the Department of Pathology, Düzce University School of Medicine, diagnosed between 2012 and 2021 were included in the study. The mitotic count from the ten fields with the highest number of mitotic figures was determined. Immunohistochemistry was performed on the formalin-fixed, paraffin-embedded tissue blocks to determine STAT3, ki-67, and PHH3 expression. STAT3 was scored between 0 and 3 points according to staining intensity. Staining percentages for STAT3 were determined using a manual count of stained cells and the total number of tumor cells. The ki-67 labeling index was determined as a percentage by a manual count. For PHH3, the total number of immunostained mitotic figures per 10 high-power fields were evaluated in each case. Results: A statistically significant difference was found in terms of the percentage of STAT3 staining between the tumor grades (p=0.047). STAT3 expression was significantly higher in cases with high tumor grades. A moderate positive correlation was found between ki-67 and PHH3 when calculated as a percentage in the area with the highest mitotic index by manual counting (r=0.621, p=0.001). Conclusion: A combination of ki-67, PHH3, and STAT3 will be useful in the grading of meningiomas and predict the recurrence.

Keywords:

meningioma, grade, STAT3, PHH3, ki67,

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