Image-Guided Ablative Options for Desmoid Fibromatosis: Contemporary Evidence and Guideline Integration

Most patients with a newly diagnosed desmoid tumor should begin with multidisciplinary evaluation and active surveillance rather than immediate intervention, provided that symptoms are limited and further growth is unlikely to create irreversible morbidity. Treatment should be initiated when pain, functional limitation, sustained progression, or threatened critical structures make continued observation unacceptable. Percutaneous cryoablation is generally favored because the ice ball can be monitored directly, treatment can be personalized/tailored with the synergistic benefit of multiple probes, and the procedure can be repeated or staged when a complete margin would be unsafe. Complete ablation should be targeted when the entire tumor can be covered without jeopardizing skin, nerves, bowel, or other vulnerable structures; deliberate subtotal ablation is appropriate when the principal goal is pain relief or functional improvement and a safe circumferential margin is not achievable. Hydrodissection, skin warming, neural protection, and conservative treatment near critical anatomy are essential. Magnetic resonance-guided focused ultrasound is an attractive incisionless alternative for tumors with a favorable acoustic window. Microwave or radiofrequency ablation should be reserved for carefully selected lesions and experienced operators; electrochemotherapy and chemical ablation remain investigational with some promising early evidence. Embolization can be useful for hypervascular tumors that are poorly suited to direct percutaneous treatment. Local and systemic therapy should not be viewed as mutually exclusive: systemic treatment is often preferable for diffuse, intra-abdominal, or anatomically hazardous disease, while ablation can address a dominant symptomatic focus, residual viable tumor, or focal progression. Further study into the benefits and sequencing of combining local therapy with systemic or targeted options will be helpful in the multi-disciplinary evaluation of this complex patient cohort.