Desmoid Tumors

Diagnosis

Mayo Clinic specialists use several tests and imaging techniques to evaluate and diagnose desmoid tumors.

Biopsy

Surgery may be needed to gather a biopsy sample for accurate diagnosis. After a specialist gathers tissue, a pathologist examines the cells under a microscope to determine if desmoid cells are present. For small tumors, the specialist may remove the entire mass during the biopsy procedure.

Ultrasound

Sound waves can be used to form images that identify the presence of a tumor. An ultrasound is performed by placing a probe on the skin surface while monitoring the image of the area on a computer screen. This procedure is noninvasive and painless.

Computed Tomography (CT) Scan

Computed tomography (CT) scans generate two-dimensional images of the body that can show whether cells have invaded other tissues or organs. The CT scanners at Mayo Clinic use modern spiral CT technology (X-ray tube revolves around patient), and several CT scanners use multi-detector row spiral technology. Spiral CT scans produce high-resolution two-dimensional images, whereas multi-detector row spiral CT scans can create high-resolution three-dimensional images.

Magnetic Resonance Imaging (MRI) Scan

Magnetic resonance imaging (MRI) technology uses magnetic fields and radio waves to create detailed images of the area affected by the tumor. This highly sensitive technology can identify small abnormalities.

PET Scans

Positron emission tomography (PET) is a noninvasive imaging technique that creates three-dimensional images of the heart, brain and other organs of the body.