Tc-99m Tectrotyd (Octreotide) scintigraphy

 

The aim of the examination is to determine the location and extent of the so-called neuroendocrine tumor which is presumably present in the patient’s body. In an intravenous injection we administer a substance called octreotide – which contains a radioactive element (Tc-99m) - into the blood that reaches the cells of the neuroendocrine tumor via circulation and binds to the so-called somatostatine receptor found on their surface. At least in two different times (1 and 4 hours later) we take images of the whole body with a special camera and then complement CT-scans are made in order to determine the exact location of the abnormality. This camera detects the radioactivity bound in the body and through this the location and extent of the tumor.

Preparations

Keeping a special diet is not necessary. Excessive fluid intake is recommended. Certain medications may interfere with the therapy. If the patient takes any kind of drugs, the therapist has to inform them 4-6 weeks (!) before the therapy about taking which medications have to be suspended temporarily. If the patient knows that any of his/her family members (siblings, parents, grandparents) has or had neuroendocrine tumor (thyroid, adrenal or carcinoid tumor, etc.), they have to inform the therapist and the colleague in the isotope laboratory.