Desmoid Tumors Management and Surveillance

Definition and Etiology

• The National Comprehensive Cancer Network recommends that familial history, especially in patients with Familial Adenomatous Polyposis (FAP), is a significant risk factor for desmoid tumors 1

Classification and Presentation

• The European Society for Medical Oncology notes that desmoid tumors are classified based on location, with abdominal wall tumors having a better prognosis compared to extremities 2
• Tumor location significantly affects prognosis, with abdominal wall having better outcomes compared to extremities 2

Management

Initial Approach

• The American College of Surgeons recommends watchful waiting as the initial approach for most asymptomatic patients, replacing immediate surgery as the standard first-line treatment, with progression-free survival rates of 50% at 5 years 1, 3

Surgical Management

• The European Society for Medical Oncology indicates that surgery is indicated when watchful waiting fails, complications occur, or major cosmetic issues are present 2, 4
• For FAP-associated intra-abdominal desmoids, surgery should be restricted to treating secondary effects of the disease and performed only in expert centers 4

Non-surgical Treatments

• The National Institute for Health and Care Excellence suggests that for FAP patients with intra-abdominal or abdominal wall desmoids, sulindac in combination with high-dose selective estrogen receptor modulators may be effective 4

Surveillance

• The American College of Radiology recommends MRI surveillance to assess response to treatment, with serial imaging with CT or MRI every 6-12 months depending on growth rate 4, 5
• For FAP patients, radiological screening at 12 months following diagnosis is suggested 4