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An octreotide scan is a type of SPECT scintigraphy used to find carcinoid, pancreatic neuroendocrine tumors, and to localize sarcoidosis. It is also called somatostatin receptor scintigraphy (SRS). Octreotide , a drug similar to somatostatin , is radiolabeled with indium-111 , [ 1 ] and is injected into a vein and travels through the bloodstream.
Octreotide is used for the treatment of growth hormone producing tumors (acromegaly and gigantism), when surgery is contraindicated, pituitary tumors that secrete thyroid-stimulating hormone (thyrotropinoma), [citation needed] diarrhea and flushing episodes associated with carcinoid syndrome, and diarrhea in people with vasoactive intestinal peptide-secreting tumors ().
Patients were randomly assigned to receive either 177 Lu-DOTATATE and octreotide LAR at a dose of 30 mg every four weeks for symptom control (n=116) or to only receive octreotide LAR at a dose of 60 mg every four weeks (n=113, control group). In total, 200 out of the 231 patients entered long-term follow-up.
Participants were randomly assigned to receive either 177 Lu dotatate with long-acting octreotide or long-acting octreotide, at a higher dose, alone. [15] 177 Lu dotatate was injected through the vein and long-acting octreotide was injected in the muscle. [15] Both, participants and health care providers knew which treatment was given. [15]
A small intestine neuroendocrine tumor is a carcinoid in the distal small intestine or the proximal large intestine. It is a relatively rare cancer and is diagnosed in approximately 1/100000 people every year. In recent decades the incidence has increased. [1] The prognosis is comparatively good with a median survival of more than 8 years. [2]
Although estimates vary, the annual incidence of clinically significant neuroendocrine tumors is approximately 2.5–5 per 100,000; [103] two thirds are carcinoid tumors and one third are other NETs. The prevalence has been estimated as 35 per 100,000, [ 103 ] and may be considerably higher if clinically silent tumors are included.
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The new 2019 WHO classification and grading criteria for neuroendocrine tumors of the digestive system grades all the neuroendocrine tumors into three grades, based on their degree of cellular differentiation (from well-differentiated NET grade (G)1 to G3, and poorly-differentiated neuroendokrina cancer, NEC G3), morphology, mitotic rate and Ki ...