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Difference Between Endoscopy and Gastroscopy

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Medical procedures that involve the examination of the gastrointestinal (GI) tract play a crucial role in diagnosing and treating various digestive disorders. Two common procedures often used for this purpose are endoscopy and gastroscopy.

While they share similarities, they serve distinct purposes and involve different aspects of the GI tract. In this article, we will explore the key differences between endoscopy and gastroscopy, shedding light on their uses, procedures, and what patients can expect.

What Is Endoscopy?

Endoscopy is a medical procedure that involves the use of an endoscope, a long, flexible tube with a camera and light source at the tip, to examine the interior of the body. It is a versatile tool used to visualize various organs and structures, not limited to the GI tract. Endoscopy can be employed to examine the esophagus, stomach, intestines, airways, joints, and more.

Types of Endoscopy

Endoscopy encompasses several types, each designed for specific purposes:

  • Esophago-gastro-duodenoscopy: Focuses on the examination of the esophagus, stomach, and first part of the small intestine.
  • Bronchoscopy: Examines the airways and lungs.
  • Colonoscopy: Views the entire colon up to the rectum.
  • Arthroscopy: Evaluates joint conditions.
  • Cystoscopy: Inspects the urinary bladder and urethra.

Uses of Endoscopy

Endoscopy is employed for various diagnostic and therapeutic purposes, such as:

  • Identifying the cause of gastrointestinal symptoms like abdominal pain, bleeding, or difficulty swallowing.
  • Detecting and removing polyps or tumors.
  • Biopsies for tissue sampling and cancer diagnosis.
  • Treating gastrointestinal conditions like removing gallstones or dilating narrowed areas.

What Is Gastroscopy?

Gastroscopy, also known as upper endoscopy or esophagogastroduodenoscopy (OGD), is a specific type of endoscopy focused on the upper GI tract. It involves the examination of the esophagus, stomach, and duodenum (the first part of the small intestine) using a gastroscope—a specialized endoscope designed for this purpose.

Uses of Gastroscopy

Gastroscopy is primarily employed for diagnosing and treating conditions affecting the upper GI tract, including:

  • Evaluating symptoms such as heartburn, acid reflux, difficulty swallowing, and abdominal pain.
  • Identifying the cause of gastrointestinal bleeding, ulcers, or inflammation.
  • Taking biopsies to confirm or rule out conditions like gastritis or Barrett’s esophagus.
  • Removing polyps or treating bleeding ulcers during the procedure.
  • Key Differences Between Endoscopy and Gastroscopy

While both endoscopy and gastroscopy involve the use of endoscopes and share some similarities, they differ in several significant ways:

Scope of Examination

Endoscopy: Can involve the examination of various organs and structures throughout the body, depending on the type of endoscopy being performed. It is not limited to the GI tract.
Gastroscopy: Specifically focuses on the upper GI tract, including the esophagus, stomach, and duodenum.

Purpose and Area of Interest

  • Endoscopy: May be used for diagnostic and therapeutic purposes, ranging from joint examinations to airway evaluations. It is not limited to diagnosing gastrointestinal conditions.
  • Gastroscopy: Primarily employed to diagnose and treat disorders of the upper GI tract, making it an essential tool for gastroenterologists and surgeons.

Procedure and Sedation

  • Endoscopy: The procedure’s details vary depending on the area being examined, and sedation may or may not be used.
  • Gastroscopy: Usually performed with the patient under sedation to minimize discomfort. The patient may receive a local anesthetic to numb the throat.

Areas Examined

  • Endoscopy: Covers a wide range of anatomical structures, potentially examining areas such as the bronchi, colon, or joints.
  • Gastroscopy: Specifically inspects the upper GI tract, including the esophagus, stomach, and the beginning of the small intestine (duodenum).

Conditions Diagnosed

  • Endoscopy: Diagnoses conditions related to the specific area examined, which can range from lung diseases to joint disorders.
  • Gastroscopy: Focuses on diagnosing upper GI tract conditions like gastroesophageal reflux disease (GERD), gastritis, ulcers, and early signs of esophageal cancer.

Common Symptoms Addressed

  • Endoscopy: Addresses a broader range of symptoms and conditions, depending on the area of concern. It is not limited to gastrointestinal symptoms.
  • Gastroscopy: Primarily used for symptoms related to upper GI tract problems, including heartburn, difficulty swallowing, and gastric pain.

Biopsy and Treatment

  • Endoscopy: Can be employed for taking biopsies or performing treatments like removing polyps or gallstones, depending on the procedure.
  • Gastroscopy: Routinely involves taking biopsies and treating conditions such as bleeding ulcers or dilating strictures during the procedure.

Medical Specialists

  • Endoscopy: Can be performed by various medical specialists, including gastroenterologists, pulmonologists, orthopedic surgeons, and more.
  • Gastroscopy: Typically performed by gastroenterologists or general surgeons.

The Procedure: What to Expect

  • Both endoscopy and gastroscopy are minimally invasive procedures conducted in a clinical or hospital setting. Patients should follow specific instructions provided by their healthcare providers before the procedure, which may include fasting for several hours.

During the Procedure

  • Endoscopy: The patient may receive sedation or local anesthesia as needed. The endoscope is carefully inserted through a natural body opening, such as the mouth or rectum, to access the target area. The physician visually examines the area and may perform treatments or take biopsies as necessary.
  • Gastroscopy: Sedation is commonly administered to ensure patient comfort. The gastroscope is gently inserted through the mouth and into the esophagus, then advanced into the stomach and duodenum. The healthcare provider assesses the upper GI tract and conducts any required interventions.

After the Procedure

  • Patients may be observed in a recovery area until the sedation wears off.
  • Any discomfort or side effects, such as a sore throat or bloating, are typically temporary.
  • Patients are usually advised to avoid consuming food or drinks until the throat’s numbness from the procedure subsides.


Endoscopy and gastroscopy are valuable medical procedures that enable healthcare providers to visualize and assess different areas of the body, particularly within the gastrointestinal tract. While endoscopy encompasses a wide range of applications and can examine various anatomical structures, gastroscopy is a specialized form of endoscopy specifically focused on diagnosing and treating conditions within the upper GI tract.

Patients undergoing either procedure can expect minimal discomfort, thanks to sedation and local anesthesia, and both procedures are typically well-tolerated. The type of endoscopy performed depends on the symptoms and the anatomical site in question.

It’s crucial for patients to communicate openly with their healthcare providers about their symptoms, concerns, and any medical conditions they may have. This information helps the healthcare team determine the most appropriate procedure and tailor the experience to the patient’s specific needs.

Whether it’s a general endoscopy or a specialized gastroscopy, these procedures play a vital role in diagnosing, treating, and managing gastrointestinal conditions. When performed by skilled healthcare providers, they can provide valuable insights into a patient’s health and pave the way for effective treatment and improved well-being.

Patients who are advised to undergo either any types of endoscopies should follow their healthcare provider’s recommendations and ask any questions they may have about the procedure, potential risks, and expected outcomes. By actively participating in their healthcare journey, patients can make informed decisions and collaborate with their healthcare team to achieve the best possible outcomes for their health.

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