Our stomach plays a vital role in digesting food. Situated in the gastrointestinal (GI) tract, the stomach is just one part of the long tube that essentially begins at our mouth and ends at the anus, the exit point for waste. Enzymes and digestive juices combine to break down food, easing its movement into the small intestine. Hence, the onset of stomach cancer can cause significant discomfort and emotional stress by disrupting the stomach’s functions. Detecting stomach cancer in its early stages can help overcome it and significantly improve the overall quality of life.
What is Stomach Cancer?
Gastric cancer, often known as stomach cancer, involves the abnormal growth of cells that usually begins in the stomach lining. Stomach cancer can develop in any part of your stomach. Most cases of stomach cancer develop in the main section of your stomach, referred to as the stomach body.
Lymphomas, or cancers that originate from immune cells called lymphocytes, can begin in your stomach's wall. Gastrointestinal stromal tumours (GISTs) can start from primitive cells in your stomach's wall called interstitial cells of Cajal. Some GISTs tend to invade nearby areas or metastasise. Roughly, 90% to 95% of stomach cancer instances are categorised as adenocarcinomas. These cancer types originate from the epithelial cells that make up the innermost lining of your stomach, called the mucosa.
Symptoms of Stomach Cancer
The following are some of the common gastric cancer symptoms.
• Your bowel habits might change, either with more frequent trips or having difficulty passing stool
• You might feel fullness or a bloated sensation after eating
• Your desire to eat might decrease
• You might sense food getting stuck in your throat when eating
• You could experience pain or uneasiness in your stomach area
• You might feel discomfort or a burning sensation in your upper abdomen
In more advanced stages of the tumour in stomach, you might experience more severe stomach tumour symptoms, such as:
• A possibility of vomiting blood or noticing blood in your stool
• Loss of a significant amount of weight without any apparent reason
• Feelings of extreme tiredness and lack of energy
Causes of Stomach Cancer
Several of the following factors can trigger tumour in stomach.
• Inheriting genetic mutations such as those causing familial adenomatous polyposis or hereditary nonpolyposis colorectal cancer heightens the likelihood of cancer
• A family history of stomach cancer increases your susceptibility
• A diet rich in smoked, pickled, and salted foods while lacking in fresh fruits and vegetables increases your risk
• If you have had a partial gastrectomy for ulcer disease, your risk can be higher, especially after about two decades
• Remember that regular alcohol consumption is generally linked to a greater likelihood of cancer
• If you are aged 60 and above, you become more vulnerable to this type of cancer
How is Stomach Cancer Diagnosed?
The following are some of the common methods used to diagnose gastric cancer.
Utilising X-rays from various angles, a CT scan constructs detailed 3D images of your body's interior. A contrast medium (dye) may be used to enhance image clarity, which can be either swallowed or injected into a vein to improve image quality. An MRI employs magnetic fields to create detailed body images.
Endoscopic Ultrasound combines endoscopy with ultrasound imaging to visualise internal organs. Ultrasound waves create images that help doctors assess the extent of the cancer spread to nearby organs and tissues.
Laparoscopy is a popular minor surgical procedure that involves inserting a laparoscope into your abdomen to check for cancer spread in the abdominal lining or liver. These areas might not be easily detected by CT or PET scans. In PET-CT Scan, a radioactive sugar substance is introduced into your body. Energy-consuming cells, including cancer cells, absorb this substance. A PET-CT scan combines PET and CT scans to create images revealing areas of active energy use.
For a barium swallow test, you need to consume a liquid containing barium to enhance the visibility of abnormalities during X-ray imaging. A biopsy procedure typically involves removing a small tissue sample for microscopic examination. While other tests might suggest the presence of cancer, only a biopsy procedure can confirm the diagnosis definitively.
Your doctor examines your body's interior by using a gastroscope or endoscope, a flexible tube with a light. A tissue sample can be taken for biopsy to detect signs of cancer.