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Stomach Cancer: Causes, Symptoms, Diagnosis, and Treatment Introduction Stomach cancer, also known as gastric cancer, is a disease in which malignant (cancer) cells form in the lining of the stomach. Although its incidence has declined globally, it remains a significant cause of cancer-related deaths, particularly in certain parts of Asia, South America, and Eastern Europe. Early detection is crucial, as stomach cancer often shows no symptoms in its initial stages. In this comprehensive guide, we’ll cover everything you need to know about stomach cancer — from risk factors and early symptoms to diagnosis, treatment options, and prevention. What Is Stomach Cancer? Stomach cancer refers to cancer that originates in the stomach, a muscular sac located in the upper middle of your abdomen, just below the ribs. The stomach is part of the digestive system and helps break down food using acids and enzymes. Most cases of stomach cancer begin in the mucosa, the innermost lining of the stomach. The most common type is adenocarcinoma, which accounts for about 90-95% of all stomach cancers. Types of Stomach Cancer Adenocarcinoma – Arises from the glandular cells of the stomach lining. Gastrointestinal stromal tumors (GISTs) – Rare tumors that begin in the connective tissue. Lymphoma – Cancer of the immune system tissue found in the stomach. Carcinoid tumors – Begin in hormone-producing cells of the stomach. Squamous cell carcinoma and others – Extremely rare and usually secondary cancers. Risk Factors and Causes Several factors increase the risk of developing stomach cancer: Helicobacter pylori infection (H. pylori): A common bacterial infection linked to stomach ulcers and cancer. Diet high in salty and smoked foods: Preserved and pickled foods may increase risk. Low intake of fruits and vegetables Family history of stomach cancer Smoking Previous stomach surgery Certain genetic conditions: Like Lynch syndrome, familial adenomatous polyposis (FAP). Age and gender: Most common in people over 50 and more prevalent in men. Common Symptoms of Stomach Cancer Stomach cancer symptoms are often vague or absent in the early stages, making it difficult to detect early. However, as the disease progresses, signs may include: Persistent indigestion or heartburn Bloating after eating Nausea or vomiting Loss of appetite Unexplained weight loss Stomach pain Fatigue Vomiting blood or blood in stool If you experience any of these symptoms for more than a few weeks, consult a healthcare professional for evaluation. Diagnosis: How Stomach Cancer Is Detected Early diagnosis can significantly improve the survival rate of stomach cancer. Doctors may use several tests and procedures to diagnose the disease: Physical examination and medical history Endoscopy (gastroscopy): A thin tube with a camera inserted through the mouth to examine the stomach lining. Biopsy: Tissue samples taken during endoscopy for laboratory analysis. Imaging tests: CT scan MRI PET scan Barium swallow Blood tests for anemia or tumor markers like CEA and CA 19-9. Stomach Cancer Staging Staging helps determine the extent of cancer and guides treatment. The stages include: Stage 0 (Carcinoma in situ): Abnormal cells in the mucosa. Stage I: Cancer has invaded the submucosa or muscle layer. Stage II-III: Involves deeper layers or spread to lymph nodes. Stage IV: Advanced cancer that has spread to distant organs like the liver, lungs, or bones. Treatment Options for Stomach Cancer Treatment depends on the cancer stage, location, overall health, and patient preferences. Common treatment methods include: 1. Surgery Subtotal (partial) gastrectomy: Removal of part of the stomach. Total gastrectomy: Removal of the entire stomach. Lymphadenectomy: Removal of nearby lymph nodes. 2. Chemotherapy Used before surgery (neoadjuvant) to shrink tumors or after surgery (adjuvant) to destroy remaining cancer cells. 3. Radiation Therapy Often combined with chemotherapy to kill cancer cells or relieve symptoms in advanced cases. 4. Targeted Therapy Drugs like trastuzumab (Herceptin) for HER2-positive stomach cancers or ramucirumab for advanced cases. 5. Immunotherapy Checkpoint inhibitors like nivolumab and pembrolizumab may be used for certain advanced cancers. Prognosis and Survival Rates The prognosis depends on the stage at diagnosis. According to the American Cancer Society: Localized (early-stage): 5-year survival rate is about 70%. Regional (spread to nearby lymph nodes): 5-year survival is about 32%. Distant (metastatic): 5-year survival drops to about 6%. Early detection remains the most important factor for improving survival. Can Stomach Cancer Be Prevented? While not all cases can be prevented, certain lifestyle choices can reduce your risk: Treat H. pylori infections promptly Avoid smoking and tobacco use Eat a diet rich in fruits and vegetables Limit intake of salty, smoked, and processed foods Maintain a healthy weight Exercise regularly In high-risk individuals, such as those with a strong family history, genetic counseling and regular screening might be recommended. Living with Stomach Cancer A stomach cancer diagnosis can be emotionally and physically overwhelming. Supportive care options include: Nutrition support: Since the stomach is involved, dietary changes may be necessary. Pain management and palliative care Support groups and mental health counseling Regular follow-up care to monitor recurrence Conclusion Stomach cancer is a serious but treatable condition, especially when caught early. Being aware of the risk factors and symptoms can lead to earlier diagnosis and better outcomes. If you're experiencing persistent digestive issues or have a family history of gastric cancer, don't ignore the signs — seek medical advice promptly. For those diagnosed, advances in treatment — including surgery, targeted therapy, and immunotherapy — are improving outcomes and offering hope for a better quality of life.