Disorders that affect the digestive (gastrointestinal) system are called digestive disorders. Some disorders simultaneously affect several parts of the digestive system, whereas others affect only one part or organ. (See also Overview of the Digestive System Overview of the Digestive System The digestive system, which extends from the mouth to the anus, is responsible for receiving food, breaking it down into nutrients (a process called digestion), absorbing the nutrients into... read more .)
Based on the findings of the medical history Medical History Usually, a doctor can determine whether a person has a digestive disorder based on the medical history and a physical examination. The doctor can then select appropriate procedures that help... read more , physical examination Physical Examination Usually, a doctor can determine whether a person has a digestive disorder based on the medical history and a physical examination. The doctor can then select appropriate procedures that help... read more , and, if applicable, psychologic evaluation Psychologic Evaluation Usually, a doctor can determine whether a person has a digestive disorder based on the medical history and a physical examination. The doctor can then select appropriate procedures that help... read more , doctors choose appropriate tests. Tests done on the digestive system include the following:
Computed tomography and magnetic resonance imaging Computed Tomography and Magnetic Resonance Imaging of the Digestive Tract Computed tomography (CT) and magnetic resonance imaging (MRI) scans are good tests for assessing the size and location of abdominal organs. Additionally, cancerous (malignant) or noncancerous... read more
Ultrasound scanning (ultrasonography) Ultrasound Scanning (Ultrasonography) of the Abdomen Ultrasound scanning uses sound waves to produce pictures of internal organs (see also Ultrasonography). An ultrasound scan can show the size and shape of many organs, such as the liver and pancreas... read more
These tests can help a doctor locate, diagnose, and sometimes treat a problem. Some tests require the digestive system to be cleared of stool, some require fasting, and others require no preparation.
Although diagnostic tests can be very useful in diagnosing the presence or absence of certain medical disorders, they can also be quite expensive and, in rare cases, cause bleeding or injury. It is important to discuss risks and benefits of a test with the doctor.