1. Stomach cancer
Also called gastric cancer is cancer arising from stomach tissue.it is uncontrolled cell growth of stomach layers lead to dysfunction of the gastric process with more clinical features such as dysphagia and indigestion

2. Types of stomach cancer
1- Adenocarcinomas is develop within the cells of the innermost lining of the stomach. The majority of stomach cancers are classified as adenocarcinomas.

3. 2- Lymphoma is a cancer of the immune system tissue that may start anywhere there are lymph tissues, including the stomach. Lymphomas in the stomach are rather rare and only account for about 4 percent of all stomach cancers. 

4. 3-Gastrointestinal stromal tumors, or GISTs, are a rare type of stomach cancer that starts in a special cell found in the lining of the stomach called interstitial cells of Cajal (ICCs).
4-Carcinoid tumors typically start in the hormone producing cells of the stomach. These tumors usually do not spread to different organs and account for only about 3 percent of stomach cancer incidence

5. Causes of gastric cancer
A diet high in salty and smoked foods
A diet low in fruits and vegetables
Eating foods contaminated with a fungus called aflatoxin
Family history of stomach cancer
Infection with Helicobacter pylori

6. Causes of stomach cancer
6- Long-term stomach inflammation 7-Pernicious anemia 8-Smoking 9-Stomach polyps

7. Signs and symptoms of gastric cancer include the following
Indigestion
Nausea or vomiting
Dysphagia
Postprandial fullness
Loss of appetite
Melena or pallor from anemia

8. Signs and symptoms of gastric cancer include the following
7- Hematemesis 8- Weight loss 9- Palpable enlarged stomach 10- Enlarged lymph nodes such as Virchow nodes (ie, left supraclavicular) and Irish node (anterior axillary)

9. Diagnosis of gastric cancer
Esophagogastroduodenoscopy (EGD): To evaluate gastric wall and lymph node involvement
Barium swallows: May be helpful in delineating the extent of disease when obstructive symptoms are present or when bulky proximal tumors prevent passage of the endoscope to examine the stomach distal to an obstruction

10. Diagnosis of gastric cancer
Chest radiography: To evaluate for metastatic lesions
CT scanning or MRI of the chest, abdomen, and pelvis: To assess the local disease process and evaluate potential areas of spread
Endoscopic ultrasonography (EUS): Staging tool for more precise preoperative assessment of the tumor stage
Biopsy of any ulcerated lesion should include: at least six specimens taken from around the lesion because of variable malignant transformation. In selected cases, endoscopic ultrasonography may be helpful in assessing depth of penetration of the tumor or involvement of adjacent structures.

11. Send biopsy to Labe for evaluation Histologically status:-
Adenocarcinoma %
Lymphomas - 1-5%
Gastrointestinal stromal tumors - 2%
Carcinoids - 1%
Adenoacanthomas - 1%
Squamous cell carcinomas - 1%

12. Management of stomach cancer
Surgical treatment The surgical approach in gastric cancer depends on the location, size, and locally invasive characteristics of the tumor.
Types of surgical intervention in gastric cancer include the following:
Total gastrectomy, if required for negative margins
Esophagogastrectomy for tumors of the cardia and gastroesophageal junction
Subtotal gastrectomy for tumors of the distal stomach
Chemotherapy
Radiotherapy

13. complications of gastric cancer may include the following
Pathologic peritoneal and pleural effusions
Obstruction of the gastric or small bowel
Bleeding in the stomach from esophageal
Intrahepatic jaundice caused by hepatomegaly
Extra hepatic jaundice
Inanition from starvation or cachexia of tumor origin