131I-Metaiodobenzylguanidine (mIBG) Archives

Tag: 131I-Metaiodobenzylguanidine (mIBG)

Iodine-131 meta-iodobenzylguanidine (I-131 MIBG) is a radiopharmaceutical used for both imaging and treating certain types of neuroendocrine tumours. Neuroendocrine tumours that can be treated with I-131 MIBG include neuroblastomas, paragangliomas and pheochromocytomas.

This targeted radionuclide therapy is able to detect and treat these tumours because the compound mIBG is very similar to norepinephrine/noradrenaline, a neurotransmitter chemical that is taken up by certain neuroendocrine cells. I-131 mIBG is used to treat neuroendocrine tumours by selectively targeting and killing neuroendocrine tumours that take up mIBG. See my article on scans – click here

14 Jan 2025

By Ronny Allan

8 Comments

Neuroendocrine Cancer – If you can see it, you can detect it!

Living with Neuroendocrine Cancer, Survivorship111In-DTPA-D-Phe1, 123I-Metaiodobenzylguanidine (mIBG), 131I-Metaiodobenzylguanidine (mIBG), 18F-FDG, 18F-FDOPA, Advanced neuroendocrine cancer, CT enterography, CT scan, Diagnosis, DOTA-NOC, DOTA-TATE, DOTA-TOC, Echocardiogram, Endoscopic ultrasound (EUS), Endoscopy, Explorer PET scan, Fluoro-18-L-Dihydroxyphenylalanine, Ga68 PET/CT, Magnetic resonance imaging (MRI) scan, Medullary thyroid cancer (MTC), Metastatic Neuroendocrine Cancer, Neuroblastoma, Neuroendocrine, Neuroendocrine cancer, Neuroendocrine carcinoma (NEC), Neuroendocrine tumour (NET), Octreoscan (Octreotide scan), Octreotide scan, Paraganglioma, Pentetreotide, Pheochromocytoma, Somatostatin analogues, Somatostatin receptor scintigraphy (SRS), SPECT, SSTR-PET, Survivorship, Technetium-99m (Tc-99m), Ultrasound, X-ray

Updated December 2025 Background Scanning is a key diagnostic support and surveillance tool for any cancer. Even though you have elevated bloods or urine (....or not), a picture of your insides is really like a thousand words.... and each picture has a story behind it. Scanning can be a game changer in the hunt for tumours and although scans do not normally confirm the cancer type and grade, they certainly help with that piece of detective work and are key in the staging of the cancer. When I read stories of people in a difficult diagnosis, I always find myself saying 'a scan…

01 Dec 2024

By Ronny Allan

23 Comments

Neuroendocrine Cancer – tumour markers and hormone levels

A Spotlight on NENs - Testing Series, Patient Advocacy131I-Metaiodobenzylguanidine (mIBG), 5-HIAA, 5-HT, 5-HTP, 5-Hydrotryptophan (5-HTP), 5-Hydroxyindoleacetic Acid (5-HIAA), 5-Hydroxytryptamine (5-HT), Adrenocorticotropic Hormone (ACTH), Biopsy, C-peptide, Calcitonin, Carcinoid crisis, Carcinoid heart disease, Carcinoid syndrome, Catecholamines, Chromaffin cells, Chromogranin, Chromogranin A (CgA), Chromogranin B (CgB), Chromogranin C (CgC), Cortisol, Electrolytes, Endocrine, Fasting Gut Endocrine Profile, Flushing, Gastric NET, Gastrin, Gastrin pH, Gastrinoma, Gastroesophageal reflux disease (GERD), Genetic testing, Glucagon, Glucagonoma, Hedinger syndrome, Histamine, Hormones, Hypertension, Insulin, Insulinoma, MEN1 syndrome, Metanephrines, Molecular markers, NETest, Neuroendocrine, Neuroendocrine cancer, Neuroendocrine carcinoma (NEC), Neuroendocrine tumour (NET), Neurokinin A (NKA), NKA, NT-proBNP, Pancreastatin, Pancreatic cancer, Pancreatic NET (PanNET), Pancreatic polypeptide (PP), Pheochromocytoma, Plasma 5HIAA, PPoma, Proinsulin, Proton pump inhibitors (PPI), Red blood count (RBC), Renal insufficiency, Serotonin, Serum serotonin, Somatostatin, Somatostatinoma, Substance K, Substance P, Tachycardia, Tachykinin, VIPoma, Wheezing, Zollinger-Ellison Syndrome

Originally published 2016, updated October 2025 Background Some people hear the terms "tumour markers" and "hormone levels" when they are diagnosed with Neuroendocrine Neoplasms (NENs). That might be confusing or even alarming at the time. Most people diagnosed with cancer will have had a form of medical testing at some point in their life, i.e. the sampling and testing of blood, urine, saliva, stool or body tissue. With NENs, the medical staff are just measuring the content of a 'substance' and then taking a view whether this is normal or not based on pre-determined ranges. These tests are normally done…

14 Dec 2016

By Ronny Allan

4 Comments

Neuroendocrine Tumours: a spotlight on Pheochromocytoma and Paraganglioma

A spotlight on NENs - Types, Awareness, Patient Advocacy, Spotlight on NENs - Types Series123I-Metaiodobenzylguanidine (mIBG), 131I-Metaiodobenzylguanidine (mIBG), 18F-FDG, 18F-FDOPA, 24-hour urinary catacholamines and metanephrines, Adrenal glands, Adrenal medulla, Adrenaline, Adrenocortical Carcinoma (ACC), Anxiety, AZEDRA, Catecholamines, EPAS1, Epinephrine, Familial NET, FH, Ga68 PET/CT, Genetics, Hormonal crisis, Hormones, Hyperadrenergic, Hypertension, Intraoperative hypertensive crisis, Iobenguane I 131, MDH2, MEN2 syndrome, MIBG scan, Multiple Endocrine Neoplasia (MEN), Nausea, Neuroendocrine, Neuroendocrine cancer, Neuroendocrine carcinoma (NEC), Neuroendocrine tumour (NET), NF1, Octreotide scan, Palpitation, Pheochromocytoma, RET, Scan, SDHA, SDHAF2(SDH5), SDHB, SDHC, SDHD, Somatostatin analogues, Surgery, Sweating, Tachycardia, The 5 E's, Vanillylmandelic acid (VMA), Von Hippel-Lindau (VHL) Syndrome

Updated 19th August 2025 I spend a lot of time talking about the most common forms of Neuroendocrine Tumours (NETs), but what about the less well-known types? As part of my commitment to all types of NETs, I'd like to shine a light on two less common tumour types known as Pheochromocytomas and Paragangliomas - with an incidence rate of approximately 8 per million per year. They are normally grouped together, and the definitions below will confirm why. If you think it's difficult to diagnose a mainstream NET, this particular sub-type is a real challenge. So, let's get definitions out…