What Is Solitary Fibrous Tumor and How Do Families Plan for End of Life?

The short answer: Solitary fibrous tumors (SFT) — formerly called hemangiopericytoma in many sites — are rare mesenchymal tumors that can arise anywhere in the body. Most are low-grade and curable with surgery; high-grade or recurrent SFTs have poor prognosis and require palliative care and end-of-life planning.

Understanding Solitary Fibrous Tumor

SFTs are fibroblastic tumors driven by the NAB2-STAT6 fusion oncogene. They arise most commonly in the pleura (lining of the lung), but can occur virtually anywhere — meninges, retroperitoneum, orbits, soft tissues. Most SFTs are low-grade; malignant SFTs account for approximately 20% and have significantly worse prognosis.

Paraneoplastic Hypoglycemia (Doege-Potter Syndrome)

Large SFTs can secrete IGF-2, causing severe hypoglycemia (Doege-Potter syndrome) — a potentially life-threatening paraneoplastic complication. This complication requires management at end of life alongside the primary tumor burden.

Prognosis for Malignant SFT

Malignant SFT with metastases has a poor prognosis — median survival of approximately 12–24 months. Late recurrence (decades after initial resection) is a well-known feature of SFT, meaning long-term surveillance is required even after apparent cure.

Treatment for Recurrent/Metastatic SFT

Surgery remains the preferred treatment for resectable recurrences. Bevacizumab + temozolomide and trabectedin have shown activity in unresectable/metastatic SFT. No standard of care is established given rarity. Clinical trials are recommended.

Frequently Asked Questions

Is solitary fibrous tumor the same as hemangiopericytoma?

Yes — hemangiopericytoma (HPC) is now classified as solitary fibrous tumor in the current WHO classification. They share the NAB2-STAT6 fusion and are considered the same entity across histologic subtypes.

What is Doege-Potter syndrome?

Doege-Potter syndrome is severe hypoglycemia caused by large SFTs secreting insulin-like growth factor 2 (IGF-2). It is a paraneoplastic emergency requiring emergency glucose administration and tumor management.

Can a death doula help with solitary fibrous tumor end-of-life planning?

Yes — given SFT's tendency for late recurrence and uncertain trajectory, death doulas help patients and families with proactive advance care planning and legacy work throughout the disease course.

Where are SFT specialists located?

SFT is best managed at specialized sarcoma centers. The Sarcoma Foundation of America (curesarcoma.org) provides specialist referrals.

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