Some of the techniques used for the diagnosis of GIST are:
Upper endoscopy: The endoscopic specialist performs this test with the help of an endoscope, which is guided into the stomach through the mouth. An endoscope is a thin, long tube with a camera and light at the end. The oncologist recommends the patient for an upper endoscopy to detect the tumor or to obtain a tissue sample for analysis (biopsy).
Computed tomography (CT): The patient is recommended to undergo CT scans of the pelvis and abdomen. The purpose of a CT scan is to determine the size and location of GIST. It also assists the oncologist in deciding if the tumor can be removed through surgery.
Positron Emission Tomography (PET): PET scan provides high-quality images of the location and size of GISTs. It detects if the tumor is localized or has spread to other body organs. Cancer specialists may remove the tumor if it is possible to completely remove it.
Endoscopic ultrasound: During the endoscopic ultrasound, the endoscopic specialist uses the endoscope with an inducer fitted at the end. The inducer sends sound waves that provide images of the location and size of the tumor.
Biopsy: The oncologist collects the sample of tissue from the GIST and sends it to the laboratory to detect if the cells are cancerous. The biopsy can be done with the help of ultrasound. However, if it is impossible to obtain the sample with fine needle aspiration, the patient may undergo surgery for sample collection.
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