Journals / Journal of Health Sciences and Medicine / 2026 / Volume: 8 Issue: 5

A retrospective multicenter study on solitary fibrous tumors: investigation of clinical features and management approaches

Soliter fibröz tümörler üzerine retrospektif çok merkezli bir çalışma: klinik özellikler ve tedavi yaklaşımlarının incelenmesi

Serkan Yaşar(HACETTEPE UNIVERSITY, INSTITUTE OF CANCER, DEPARTMENT OF CLINICAL ONCOLOGY)0000-0002-1465-4131
Feride Yılmaz(HACETTEPE UNIVERSITY, INSTITUTE OF CANCER, DEPARTMENT OF CLINICAL ONCOLOGY)0000-0001-5848-3381
Gözde Yazıcı(HACETTEPE UNIVERSITY, SCHOOL OF MEDICINE, DEPARTMENT OF INTERNAL MEDICINE, DEPARTMENT OF RADIATION ONCOLOGY)0000-0002-7430-6729
Alper Kahvecioğlu(HACETTEPE UNIVERSITY, SCHOOL OF MEDICINE, DEPARTMENT OF INTERNAL MEDICINE, DEPARTMENT OF RADIATION ONCOLOGY)0000-0001-8714-2383
Yüksel Ürün(ANKARA UNIVERSITY, INSTITUTE OF CANCER, DEPARTMENT OF CLINICAL ONCOLOGY)0000-0002-9152-9887
Hatice Bölek(ANKARA UNIVERSITY, INSTITUTE OF CANCER, DEPARTMENT OF CLINICAL ONCOLOGY)0000-0001-8659-7327
Hilal Karakaş(Bilkent City Hospital, Ankara)0000-0001-9946-6801
Didem Şener Dede(Ankara Bilkent City Hospital)0000-0002-9756-5942
Nuriye Yıldırım Özdemir(Gazı University,Department of Medical Oncology)0000-0002-9235-9592
Volkan Aslan(Gazı University,Department of Medical Oncology)
Öztürk Ateş(Dr. Abdurrahman Yurtaslan Ankara Oncology Training and Research Hospital, University of Health Sciences)0000-0003-0182-3933
Ahmet Kadıoğlu(Dr. Abdurrahman Yurtaslan Ankara Oncology Training and Research Hospital, University of Health Sciences)0009-0002-4464-314X
Çağatay Arslan(İzmir University of Economics, Medical Point Hospital)0000-0002-3783-7432
Furkan Günen(Inonu University,Faculty of Medicine, Department of Medical Oncology)0000-0001-5508-9493
Emin Tamer Elkıran(Inonu University,Faculty of Medicine, Department of Medical Oncology)0000-0001-6681-7249
Serkan Akın(HACETTEPE UNIVERSITY, INSTITUTE OF CANCER, DEPARTMENT OF CLINICAL ONCOLOGY)0000-0002-7542-9229
Fatma Alev Türker(HACETTEPE UNIVERSITY, INSTITUTE OF CANCER, DEPARTMENT OF CLINICAL ONCOLOGY)0000-0001-5265-8128
Ömer Dizdar(HACETTEPE UNIVERSITY, INSTITUTE OF CANCER, DEPARTMENT OF PREVENTIVE ONCOLOGY)0000-0003-0911-9078
Pages
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Publication Date
2025-09-16
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AI Summary & Key Takeaways

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

Response rates to systemic treatment is generally low.

📌 3 Key Takeaways

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Objective & Hypothesis:Aims: Solitary fibrous tumors are exceedingly rare neoplasms, for which surgical resection remains the cornerstone of treatment; however, long-term surveillance is imperative due to the significant risk of recurrence.
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Key Findings & Data:Methods: Sixty-eight adult patients with histologically confirmed solitary fibrous tumor (SFT) diagnosed between 2010 and 2024 from seven cancer centers in Turkiye were included.
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Conclusion & Impact:Response rates to systemic treatment is generally low.
🔬Design:Research Article
📍Scope:2010 Verileri
⚙️Variables:Sarcoma · surgery · pazopanib

Abstract

Aims: Solitary fibrous tumors are exceedingly rare neoplasms, for which surgical resection remains the cornerstone of treatment; however, long-term surveillance is imperative due to the significant risk of recurrence. We aimed to evaluate tumor characteristics and treatment responses in this multicenter study. Methods: Sixty-eight adult patients with histologically confirmed solitary fibrous tumor (SFT) diagnosed between 2010 and 2024 from seven cancer centers in Turkiye were included. Clinical and pathological features along with treatment outcomes were assessed. Results: The majority of patients (65/68 pts, 95%) presented with localized disease and underwent primary resection, while 3 patients had metastatic disease at the time of diagnosis. Further analyses were performed only in patients with localized disease. Median follow-up time was 41.7 months. All patients underwent primary surgery; R0 resection was achieved in most patients (66.2%). Five -year DFS and OS were 67% and 87%, respectively. DFS of extrameningeal SFTs was further evaluated according to clinicopathological variables. Low Ki-67 Labeling Index, low mitotic rate, and younger age were found to be associated with longer DFS. Response rates to first-line systemic therapy after recurrence was 27% with chemotherapy and while no objective responses were achieved with pazopanib. Two patients experienced disease control for up to 11 months with pazopanib. This study is limited by the relatively small sample size and the heterogeneity arising from the inclusion of both meningeal and extrameningeal tumors located at different anatomical sites. Conclusion: Localized SFTs usually have favorable prognosis. Patients with extrameningeal SFTs with younger age, low Ki-67 Index and low mitotic rate have longer survival. Once relapsed, repeat surgical resection should be pursued when possible. Response rates to systemic treatment is generally low.

Özet

Amaç: Soliter fibröz tümörler (SFT) son derece nadir görülen neoplazmlardır ve cerrahi rezeksiyon hâlâ tedavinin temel taşıdır; ancak nüks riski yüksek olduğundan uzun dönem takip zorunludur. Bu çok merkezli çalışmada tümör özelliklerini ve tedavi yanıtlarını değerlendirmeyi amaçladık. Yöntemler: 2010–2024 yılları arasında Türkiye’deki yedi kanser merkezinde histolojik olarak doğrulanmış SFT tanısı konulan 68 erişkin hasta çalışmaya dâhil edildi. Klinik ve patolojik özellikler ile tedavi sonuçları değerlendirildi. Bulgular: Hastaların büyük çoğunluğu (65/68 hasta, %95) lokalize hastalık ile başvurmuş ve primer rezeksiyon uygulanmışken, 3 hastada tanı anında metastatik hastalık mevcuttu. İleri analizler yalnızca lokalize hastalığı olan hastalarda yapıldı. Ortanca takip süresi 41,7 aydı. Tüm hastalara primer cerrahi uygulandı; hastaların çoğunda R0 rezeksiyon sağlandı (%66,2). Beş yıllık hastalıksız sağkalım (DFS) ve genel sağkalım (OS) oranları sırasıyla %67 ve %87 idi. Ekstrameningeal SFT’lerin DFS’i klinikopatolojik değişkenlere göre ayrıca değerlendirildi. Düşük Ki-67 indeksine, düşük mitotik hızına ve daha genç yaşa sahip hastalarda daha uzun DFS gözlendi. Nüks sonrası birinci basamak sistemik tedaviye yanıt oranı kemoterapi ile %27 iken, pazopanib ile objektif yanıt elde edilmedi. İki hastada pazopanib ile 11 aya kadar hastalık kontrolü sağlandı. Sonuç: Lokalize SFT’ler genellikle iyi prognoza sahiptir. Daha genç yaşta olan, düşük Ki-67 indeksine ve düşük mitotik hızına sahip ekstrameningeal SFT hastalarında sağkalım daha uzundur. Nüks durumunda, mümkünse tekrarlayan cerrahi rezeksiyon tercih edilmelidir. Sistemik tedaviye yanıt oranları ise genel olarak düşüktür.

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Cite This Article

Yaşar, S., Yılmaz, F., Yazıcı, G., Kahvecioğlu, A., Ürün, Y., Bölek, H., Karakaş, H., Dede, D. Ş., Özdemir, N. Y., Aslan, V., Ateş, Ö., Kadıoğlu, A., Arslan, Ç., Günen, F., Elkıran, E. T., Akın, S., Türker, F. A., Dizdar, Ö. (2025). A retrospective multicenter study on solitary fibrous tumors: investigation of clinical features and management approaches. Journal of Health Sciences and Medicine, Volume: 8 Issue: 5. https://doi.org/10.32322/jhsm.1762045

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