Gastrointestinal Stromal Tumor (GIST)
GIST is a rare type of cancer that originates in the digestive tract, most commonly in the stomach or small intestine. It arises from special cells known as interstitial cells of Cajal, which are part of the autonomic nervous system.
Characteristics and Behavior
GISTs can vary in behavior, from slow-growing to aggressive. They often present as a mass in the gastrointestinal tract, which can cause bleeding and obstruction.
Symptoms
Symptoms might not be present at first. Symptoms of GIST include abdominal pain, a noticeable lump in the abdomen, gastrointestinal bleeding, fatigue, and vomiting. Symptoms vary based on the tumor’s location and size.
Causes
The exact cause of GIST is unknown, but it involves mutations in certain genes such as KIT or PDGFRA, which lead to uncontrolled cell growth.
Risk Factors
Risk factors for GIST include being over 50 years of age and having genetic mutations. Family history and certain genetic syndromes also increase risk.
Treatment Options
Treatment for GIST typically involves surgery to remove the tumor and targeted therapy with medications like imatinib, which inhibits the growth of cancer cells. The treatment approach is individualized based on the tumor’s size, location, and genetic mutations.