Oligodendrogliomas are diffuse infiltrating gliomas of adulthood. The WHO 2007 classification criteria classifies oligodendrogliomas as well-differentiated tumors (Grade 2) and anaplastic tumors (Grade 3). Osteopontin is a sialic acid-rich phosphoglycoprotein extracellular matrix component and it is an immune marker shown to be associated with parameters such as grade and recurrence in different tumors. The purpose of this study was to investigate the relationship between osteopontin and histological grades, recurrence and survival in the oligodendroglioma cases by analyzing its expression rates. Twenty-seven cases of oligodendroglioma operated at the Turkish Ministry of Health Ankara Dışkapı Education and Research Hospital, Brain Surgery Clinic between 2008 and 2011 and diagnosed at our hospitals’ pathology clinic were included in the study. Fourteen cases were diagnosed as low-grade (Grade 2, WHO 2007) oligodendroglioma and 12 as high-grade (anaplastic, Grade 3, WHO 2007), and one case was evaluated as glioblastoma with oligodendrogliomal component (Grade 4, WHO 2007). Osteopontin staining density was below the 25% in 10 cases. Nine out of those 10 cases were low-grade oligodendroglioma and one was high-grade. Immunostaining below the 25% was observed in the remaining five low-grade cases. On the basis of histological grade and expressions of osteopontin, density of staining was significantly higher in the high-grade tumors (p<0.01). Osteopontin expression scores were significantly high in high-grade tumors (p<0.05). A significant correlation in the same direction was determined between staining percentage and intensity of staining (r=0.790 and p<0.001). In conclusion, osteopontin expression rates could be associated with histological grades, recurrence and survival of oligodendriomas and could be used as a predictive value
Özet
Oligodendrogliom erişkin dönemin yaygın infiltratif bir gliomudur. DSÖ 2007 sınıflaması oligodendrogliomları iyi differensiye tümörler (Derece II) ve anaplastik tümörler (Derece III) olmak üzere iki derecede sınıflandırır. Osteopontin ekstrasellüler matriks ilişkili sialik asitten zengin fosfoglikoprotein yapısında integrin bağlayan bir protein olup, farklı tümörlerde derece ve rekürens gibi parametreler ile ilişkili olduğu yönünde veriler ortaya konmuş olan bir immün belirteçtir. Bu çalışmamızda Oligodendrogliomlarda Osteopontin ekspresyon oranlarını immünohistokimyasal olarak değerlendirerek histolojik derece, rekürens ve sağ kalım ile ilişkisini araştırmayı amaçladık. S.B Ankara Dışkapı Eğitim Araştıma Hastanesi Beyin Cerrahisi Kliniği tarafından 2008- 2011 yılları arasında ameliyat edilen ve hastanemiz patoloji kliniğinde tanı konulmuş olan toplam 27 oligodendrogliom olgusu çalışma kapsamına alındı. Bu değerlendirmede olguların 14 tanesi düşük dereceli (Derece 2, DSÖ 2007), 12 tanesi yüksek dereceli (Anaplastik, Derece 3, DSÖ 2007) oligodendrogliom olarak tanı alırken, 1 olgu Oligodendroglial komponentli Glioblastom (Derece 4, DSÖ 2007) olarak değerlendirildi. Olguların 10 tanesinde Osteopontin ile boyanma yaygınlığı %25’in altında izlendi. Bu 10 olgunun 9 tanesi düşük dereceli oligodendrogliom, 1 tanesi yüksek dereceli oligodendrogliomdu. Düşük dereceli olgulardan geri kalan 5 tanesinde %25’in altında immün boyanma izlendi. Histolojik derece ve Osteopontin ekspresyonları göz önüne alındığında yüksek dereceli tümörlerde boyanma yaygınlığı ve boyanma yoğunluğu düşük dereceli tümörlerle karşılaştırıldığında belirgin olarak yüksek düzeyde saptandı (p<0,01). Yüksek dereceli tümörlerde osteopontin ekspresyon skorlarının, düşük dereceli tümörlere oranla anlamlı olarak yüksek seyrettiği saptandı (p<0,05). Boyanma yüzdesi ile boyanma şiddeti arasında aynı yönlü istatistiksel olarak anlamlı korelasyon saptandı (r=0,790 ve p<0,001). Çalışmamızın sonucunda osteopontin ekspresyon oranlarının oligodendrogliomların histolojik derecelendirme, rekkürens ve sağ kalım ile ilişkili olduğunu ve belirleyici bir değer olarak kullanılabileceğini gösterdik.
Anahtar sözcükler: Sağ kalım, oligodendrogliom, osteopontin
Abstract
Oligodendrogliomas are diffuse infiltrating gliomas of adulthood. The WHO 2007 classification criteria classifies oligodendrogliomas as well-differentiated tumors (Grade 2) and anaplastic tumors (grade 3). Osteopontin is a sialic acid-rich phosphoglycoprotein extracellular matrix component and it is an immune marker shown to be associated with parameters such as grade and recurrence in different tumors. The purpose of this study was to investigate the relationship between osteopontin and histological grades, recurrence and survival in the oligodendroglioma cases by analyzing its expression rates. Twenty-seven cases of oligodendroglioma operated at the Turkish Ministry of Health Ankara Dışkapı Education and Research Hospital, Brain Surgery Clinic between 2008 and 2011 and diagnosed at our hospitals’ pathology clinic were included in the study. Fourteen cases were diagnosed as low-grade (Grade 2, WHO 2007) oligodendroglioma and 12 as high-grade (anaplastic, Grade 3, WHO 2007), and one case was evaluated as glioblastoma with oligodendrogliomal component (Grade 4, WHO 2007). Osteopontin staining density was below the 25% in 10 cases. Nine out of those 10 cases were low-grade oligodendroglioma and one was high-grade. Immunostaining below the 25% was observed in the remaining five low-grade cases. On the basis of histological grade and expressions of osteopontin, density of staining was significantly higher in the high-grade tumors (p<0.01). Osteopontin expression scores were significantly high in high-grade tumors (p<0.05). A significant correlation in the same direction was determined between staining percentage and intensity of staining (r=0.790 and p<0.001). In conclusion, osteopontin expression rates could be associated with histological grades, recurrence and survival of oligodendriomas and could be used as a predictive value.
Keywords: Survival, oligodendroglioma, osteopontin
Primary Language | Turkish |
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Journal Section | Surgical Science Research Articles |
Authors | |
Publication Date | December 9, 2014 |
Published in Issue | Year 2014Volume: 36 Issue: 4 |