Achalasia Type III is a subtype of achalasia defined by abnormal, spastic contractions in the esophagus. It describes a specific pattern seen on high-resolution manometry, a test that measures esophageal pressure and motility. In plain terms, the lower esophageal sphincter does not relax normally, and the esophageal body squeezes in an uncoordinated, high-pressure way. It is commonly used in gastroenterology to classify achalasia and guide discussions about management options.

Achalasia Type II is a subtype of achalasia, a disorder where the esophagus has trouble moving food into the stomach. It is defined using high-resolution manometry, a test that measures pressure and muscle function in the esophagus. In Achalasia Type II, the lower esophageal sphincter does not relax well and the esophagus pressurizes as a unit. Clinicians use this label mainly to standardize diagnosis and to help frame treatment discussions and prognosis.

Achalasia Type I is a manometry-based subtype of achalasia, sometimes called “classic achalasia.” It describes a pattern where the lower esophageal sphincter (LES) does not relax normally and the esophageal body shows absent peristalsis. In plain terms, the esophagus does not squeeze food downward effectively, and the valve into the stomach does not open well. It is most commonly used in gastroenterology when interpreting high-resolution manometry (HRM) studies.

Jackhammer Esophagus is an esophageal motility disorder marked by unusually strong swallowing contractions. It is defined using esophageal pressure testing rather than endoscopy alone. It is most commonly discussed in the context of high-resolution manometry reports. It can be considered when patients have unexplained chest pain or trouble swallowing.

Nutcracker Esophagus is a term for unusually strong squeezing (high-pressure) contractions of the esophagus during swallowing. It is most commonly discussed in the context of esophageal motility testing called manometry. It has historically been used to explain symptoms such as chest pain or difficulty swallowing when the esophagus contracts too forcefully. In many modern classifications, related patterns may be labeled differently, but the term is still encountered in learning and clinical notes.

Esophageal Motility Disorder is a problem with how the esophagus moves food and liquid toward the stomach. It reflects abnormal muscle contractions (peristalsis) and/or abnormal relaxation of the lower esophageal sphincter. It is commonly used in gastroenterology to explain symptoms such as dysphagia (trouble swallowing) and non-cardiac chest pain. It is usually discussed alongside tests like high-resolution manometry and barium esophagram.

Grey Turner Sign is bruising or discoloration over the flanks (the sides of the abdomen between the ribs and hips). It is a physical examination finding that can suggest bleeding in the retroperitoneum (the space behind the abdominal lining). It is most often discussed in the context of severe acute pancreatitis and abdominal hemorrhage. Clinicians use it as a bedside clue that may prompt urgent diagnostic evaluation.

Cullen Sign is bruising (ecchymosis) around the umbilicus (belly button). It is a physical exam finding that can suggest bleeding inside the abdomen or retroperitoneum. Clinicians most often discuss it in severe acute pancreatitis and other hemorrhagic abdominal emergencies. It is used at the bedside during an abdominal exam, not as a standalone test.

Rovsing Sign is a physical exam finding used during evaluation of abdominal pain. It describes right lower quadrant pain that occurs when the left lower quadrant is pressed. Clinicians most often discuss it when appendicitis is on the differential diagnosis. It is one component of the broader bedside abdominal examination.

McBurney Point is a surface anatomy landmark on the right lower abdomen. It is classically used during the abdominal exam to help localize suspected appendicitis. Clinicians use it as a reference point for tenderness, guarding, and peritoneal irritation. It is also historically linked to the “McBurney incision” used for appendectomy.