About Small Intestine (Small Bowel) Cancer
Small intestine cancer, also known as small bowel cancer, is a rare disease where cells in the small intestines become cancerous (malignant). The small intestine is an important part of the digestive system, responsible for breaking down food and absorbing nutrients. When malignant cells grow rapidly, they form tumors that can affect digestion and block the flow of food.
Small intestine cancer can occur in different parts of the small intestine, including the duodenum (the first part that connects to the stomach), jejunum (middle portion), and ileum (last portion that attaches to the colon). The most common types of small intestine cancer are adenocarcinomas, which start in gland cells, and leiomyosarcomas, which start in muscle tissues. Carcinoid tumors and lymphomas can also develop in the small intestine.
Symptoms of small intestine cancer can be vague and include abdominal pain, weight loss, weakness, fatigue, and anemia. Early detection and treatment are important for better outcomes.
The causes of small intestine cancer are not fully understood, but there are several risk factors associated with the disease.
Non-modifiable risk factors for small intestine cancer are factors that cannot be changed. These include:
- Underlying conditions: Crohn's disease, celiac disease, and familial polyposis syndromes like adenomatous polyposis contribute as risk factors.
- Gender: Males have a higher risk of developing cancer of the small intestine.
- Previous bowel surgery: Surgical removal of part of the bowel increases the risk.
- Weakened immune system: Lymphoma of the small intestine is strongly associated with weakened immune systems, such as occurs with AIDS.
Modifiable risk factors for small intestine cancer are factors that can be changed or influenced. These include:
- Poor dietary habits: A diet high in red meat, salt, or smoked foods may increase the risk.
- Lack of physical activity: Not being physically active is a shared risk factor with colorectal cancer.
- Smoking: Smoking may be a risk factor for duodenal cancer.
- Alcohol consumption: Drinking alcohol may also be a risk factor, although further research is needed to confirm this.
It's important to note that having these risk factors does not guarantee the development of small intestine cancer. It's always recommended to maintain a healthy lifestyle and consult with a healthcare professional for personalized advice and guidance.
Early symptoms of small intestine cancer can be vague and nonspecific, but some common ones include:
- Abdominal pain or cramping
- Unexplained weight loss
- Nausea or vomiting
- Changes in bowel habits, like diarrhea or constipation
- Fatigue or weakness, sometimes due to anemia
As the cancer progresses or reaches a higher severity, additional symptoms may occur, such as:
- Obstructive symptoms
- Carcinoid syndrome (watery stools, diarrhea, flushing of skin, sudden drops in blood pressure, edema, ascites, bronchoconstrictive attacks)
- Vitamin deficiency
- Anemia
- Diarrhea
- Bloody or black stools
- Lump in the abdomen
- Jaundice
It's important to note that these symptoms can also be indicative of other gastrointestinal diseases. If you experience any of these symptoms or if they worsen over time, it is recommended to seek immediate medical attention.
To diagnose small intestine cancer, doctors commonly perform the following examinations, tests, and procedures:
- Medical history evaluation: Your doctor will review your medical history and ask about any symptoms you may be experiencing.
- Physical exam: During a physical exam, your doctor will look for physical signs of a medical problem, such as pain, swelling, or masses in your body.
- Blood tests: These tests can help determine if there are any abnormalities in your blood that may indicate the presence of cancer.
- X-ray imaging: X-rays can provide a detailed image of your small intestine and surrounding structures to identify any abnormalities.
- MRI scan: This imaging test uses magnetic fields and radio waves to create detailed pictures of your small intestine and nearby areas.
- CT scan: A CT scan combines X-ray images taken from different angles to produce cross-sectional images of your small intestine.
- Biopsy: In this procedure, a small sample of tissue is taken from the suspected area and examined under a microscope to determine if cancer cells are present.
- Endoscopy: This procedure involves inserting a thin, flexible tube with a camera into your digestive tract to examine the small intestine and collect tissue samples if needed.
To determine the stage or severity of small intestine cancer, additional examinations, tests, and procedures may include:
- Barium swallow: This test involves drinking a liquid containing barium that coats the lining of your digestive tract. X-rays are then taken to visualize any abnormalities.
- Liver function tests: These blood tests can help evaluate how well your liver is functioning and detect any abnormalities that may suggest cancer spread.
- Laparotomy: This surgical procedure allows doctors to directly visualize the inside of your abdomen to assess the extent of cancer spread.
It's important to consult with your healthcare professional for personalized advice as they can recommend specific examinations, tests, and procedures based on your individual situation.
The goals of treatment for small intestine cancer are to:
- Cure the cancer: For early-stage cancer, the primary goal is to remove the cancerous tissue from the small intestine and potentially other affected areas of the body through surgery. This can be curative and offer a chance of complete recovery.
- Improve quality of life: If a cure is not possible, the focus shifts to improving a person's quality of life by shrinking tumors and slowing their growth for as long as possible. This can be achieved through various treatment options, including:
- Surgery: The mainstay of treatment, surgery involves removing the portion of the small intestine affected by tumors. In some cases where complete removal is not possible, bypass surgery may be performed to redirect food around the tumor.
- Chemotherapy: This involves using drugs to kill cancer cells or stop their growth. Chemotherapy can be administered orally or intravenously and may be recommended before or after surgery to target any remaining cancer cells.
- Radiation therapy: High-energy X-rays or other types of radiation are used to destroy cancer cells or shrink tumors. It can be used alongside surgery or chemotherapy to improve local control.
- Clinical trials: These evaluate new anticancer drugs, biological therapies, and treatment approaches in order to improve outcomes for patients with unresectable metastatic disease.
It's important to note that treatment recommendations depend on factors such as the stage and type of small intestine cancer, as well as individual patient characteristics. It's best to discuss treatment options with your doctor, who can provide personalized recommendations based on your specific situation.