Final answer:
Gastric cancer and bowel obstruction are subjects in this question, along with other related conditions.
Step-by-step explanation:
Gastric cancer is one of the subjects of this question. Gastric cancer is a type of cancer that starts in the stomach. It can cause symptoms such as abdominal pain, weight loss, and vomiting blood.
Bowel obstruction is another subject in the question. It occurs when there is a blockage in the intestine, preventing the passage of stool. Symptoms include abdominal pain, vomiting, and constipation.
Other subjects mentioned include increased intracranial pressure, pregnancy, migraine, irritable bowel syndrome (IBS), malignancy, appendicitis, cholecystitis, cholelithiasis, peptic ulcer disease (PUD), and urinary tract infection (UTI).