Intussusception is when one segment of intestine slides into the next segment, like a telescope folding inward. It can block the passage of intestinal contents and affect blood flow to the bowel wall. It is most commonly discussed in pediatric gastroenterology and emergency care, but it also occurs in adults. Clinicians use the term in GI, radiology, and surgery when evaluating acute abdominal symptoms or bowel obstruction.

Volvulus is twisting of a segment of the gastrointestinal tract around its supporting mesentery. It can cause bowel obstruction and reduced blood flow to the affected segment. Clinicians most often use the term when evaluating acute abdominal pain and distension. It is commonly discussed in emergency medicine, gastroenterology, radiology, and GI surgery.

Intestinal Obstruction means blockage of normal flow through the intestines. It can involve the small intestine or the large intestine (colon). It is discussed in emergency care, gastroenterology, and general surgery because it can cause severe symptoms and complications. The term is commonly used in clinical notes, imaging reports, and operative planning.

Appendectomy is a surgical procedure to remove the vermiform appendix from the right lower abdomen. It is most commonly performed when clinicians suspect appendicitis (inflammation of the appendix). It may also be done when an appendix-related tumor is suspected or found. In modern practice, it is often performed laparoscopically (through small incisions with a camera).

Appendicitis is inflammation of the vermiform appendix, a small blind-ended tube attached to the cecum in the right lower abdomen. It most often presents as acute abdominal pain with systemic and gastrointestinal symptoms. It is a common working diagnosis in emergency medicine, gastroenterology, and general surgery. Clinicians use the term to guide urgent evaluation because complications can develop if inflammation progresses.

Gastrectomy is surgery to remove part or all of the stomach. It is used to treat selected stomach diseases, including cancer and severe ulcer-related complications. It is also used in metabolic and bariatric surgery in specific settings. After Gastrectomy, food passage and digestion are rerouted or reshaped to work with less stomach tissue.

Colectomy is a surgical operation that removes part or all of the colon (large intestine). It is commonly used to treat colon cancer, severe inflammation, or complications like obstruction. Depending on the indication, surgeons may reconnect the bowel or create a stoma (an opening on the abdominal wall). It is a core procedure in gastrointestinal (GI) surgery and colorectal oncology.

Whipple Procedure is a major abdominal operation also called pancreaticoduodenectomy. It removes the pancreatic head and nearby digestive organs, then reconstructs the digestive tract. It is most commonly used for tumors near the pancreas and bile duct, especially around the ampulla. It is a core operation in hepatopancreatobiliary (HPB) and GI cancer surgery.

A Pancreatic Pseudocyst is a fluid-filled collection that forms near the pancreas. It usually develops after pancreatitis (inflammation of the pancreas) or pancreatic injury. It is called “pseudo” because its wall does not have a true epithelial lining. The term is commonly used in gastroenterology, hepatology, and GI surgery to describe a specific type of pancreatic fluid collection.

A Hydrogen Breath Test is a noninvasive test that measures gases in a person’s exhaled breath after they ingest a specific sugar. It is commonly used in gastroenterology to evaluate how the gut breaks down and absorbs carbohydrates. It can also be used to support evaluation for small intestinal bacterial overgrowth (SIBO) and intestinal transit patterns. The test is performed in outpatient clinics and, in some settings, with supervised at-home collection.