What is it?

Desmoid tumors, or aggressive fibromatosis, are benign growths of connective tissue, mostly in the abdomen, arms and legs. Desmoid tumors differ in their rate of growth, but they never spread to other organs or nearby structures. It is more common in people in their 20s-30s, people with familial adenomatous polyposis (FAP), pregnant women, and people who recently had an injury or a surgery

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Neoplasm of connective and other soft tissue.

Additional names

This group contains additional names:
- Desmoid tumor

Signs & symptoms

Symptoms include a mass or area of swelling, pain, loss of function of the affected area, and if it is located in the abdomen symptoms may include cramping and nausea.


Diagnosis is based upon findings from medical history and physical examination. Further evaluation may include imaging tests may include CT, MRI and PET and a biopsy.


Treatment may include chemotherapy, radiation therapy, immunotherapy, surgery or merely monitoring the growth of the tumor if it doesn't cause any symptoms.

☝️ This is not a substitute for professional medical advice. Please consult with your physician before making any medical decision.

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