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Solitary Fibrous Tumor (SFT)

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Solitary Fibrous Tumor (SFT) is a rare mesenchymal tumor driven by the NAB2-STAT6 gene fusion. Diagnosis is confirmed through STAT6 testing, and tumor behavior is predicted using the Demicco Risk Score. Treatment primarily involves surgery managed by sarcoma specialists, with long-term monitoring required.

Key Takeaways

  • • Solitary Fibrous Tumor (SFT) is a rare mesenchymal tumor defined by the NAB2-STAT6 gene fusion.
  • • Diagnosis is confirmed by testing tumor tissue for the STAT6 protein.
  • • Tumor behavior is predicted using the Demicco Risk Score rather than simple benign/malignant labels.
  • • Surgery is the primary treatment, though radiation and systemic therapy are used in specific cases.
  • • Long-term surveillance is essential because SFT carries a risk of late recurrence.

Receiving a diagnosis of Solitary Fibrous Tumor (SFT) can be overwhelming. You are likely hearing terms you have never heard before, like “mesenchymal,” “NAB2-STAT6,” or “hemangiopericytoma.” You may have been told your tumor is “rare” or “unpredictable.”

This guide is designed to help you navigate this complex diagnosis. SFT is a unique type of tumor that doesn’t follow the standard rules of many other cancers. It requires a specific approach to diagnosis, treatment, and long-term monitoring.

How to Use This Guide

We have broken down the journey into five key sections. You can read them in order or jump to the topic that is most urgent for you right now.

  • The Basics: What is SFT?
    • Understand what SFT is, why it was formerly called Hemangiopericytoma, and the genetic “engine” that drives it.
  • Symptoms & Diagnosis
    • Learn about common symptoms, the rare “Doege-Potter” syndrome, and how doctors confirm the diagnosis using STAT6 testing.
  • Understanding Your Risk
    • SFT isn’t just “benign” or “malignant.” Learn about the Demicco Risk Score and WHO Grading that doctors use to predict behavior.
  • Treatment Options
    • Surgery is the main treatment, but learn when radiation and specific systemic therapies (like Anti-angiogenics) are used.
  • Living with SFT
    • Survivorship is a marathon. Understand the importance of long-term surveillance and how to manage the risk of late recurrence.

A Note on Expertise

Because SFT is rare, it is crucial to seek care from a center with experience in sarcomas or rare tumors. A “Sarcoma Specialist” will have the specific knowledge needed to manage the nuances of this disease.

Disclaimer: This guide is for informational purposes only and does not constitute medical advice. Always consult with your medical team for your specific care.

Frequently Asked Questions

What is Solitary Fibrous Tumor (SFT)?
Solitary Fibrous Tumor (SFT) is a rare type of tumor that develops in soft tissues. It is driven by a specific genetic fusion called NAB2-STAT6 and does not behave like common cancers, requiring a specialized approach to diagnosis and treatment.
Is SFT the same thing as Hemangiopericytoma?
Hemangiopericytoma is an older medical term that was previously used to describe these tumors. Doctors now understand that Hemangiopericytoma and SFT are biologically the same condition, so they are grouped together under the name Solitary Fibrous Tumor.
How do doctors diagnose SFT?
Doctors use a specific test called STAT6 immunohistochemistry to confirm SFT. This test looks for a specific protein in the tumor cells. If the result is positive for STAT6, it confirms the diagnosis of Solitary Fibrous Tumor.
Is Solitary Fibrous Tumor benign or malignant?
SFT is not strictly classified as just benign or malignant. Instead, doctors use risk stratification tools like the Demicco Risk Score and WHO Grading to predict how aggressive the tumor might be and the likelihood of it returning.
What kind of doctor should I see for SFT?
Because SFT is a rare condition, it is best treated by a sarcoma specialist. These doctors have specific experience with rare soft tissue tumors and understand the nuances of SFT management compared to general oncologists.

Questions for Your Doctor

  • • How many cases of Solitary Fibrous Tumor (SFT) do you treat each year?
  • • Is my case being reviewed by a multidisciplinary tumor board that includes sarcoma specialists?
  • • Can you explain how the specific location of my tumor affects the treatment plan?
  • • What is the specific plan for coordinating my care between surgery, oncology, and radiation therapy?
  • • Are there any clinical trials for SFT that I should consider?

Questions for You

  • • Do I have copies of all my pathology reports and imaging disks organized in one place?
  • • Have I identified a support person who can attend appointments with me to take notes?
  • • What are my top three priorities for my quality of life during and after treatment?

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This guide provides a general overview of Solitary Fibrous Tumor for educational purposes. It does not replace professional medical advice; always consult a sarcoma specialist for your specific care plan.

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