Gastro: Carcinoid Tumors and Syndrome: Free MSRA Podcast

⚕️ FREE MSRA PODCAST – Carcinoid Tumours🎧 A clear, high-yield breakdown of this rare neuroendocrine tumour with systemic effects – perfect for exam prep and real-life clinicalscenarios. 🧠 Key Learning Points📌 Definition•Carcinoid tumours are slow-growingneuroendocrine tumours arising from enterochromaffin cells, most commonly found in the GI tract and lungs. They can secrete hormones, particularly serotonin, leading to carcinoid syndrome in advanced cases. 📌 Causes & Risk Factors•Exact cause unknown•Genetic syndromes: MEN1, Neurofibromatosis Type 1 (NF1)•Family history of neuroendocrine tumours•Environmental exposures (tobacco smoke, chemicals)•Older age🧠 Memory Aid: Think "GENES"– Genetics, Exposures, Neuroendocrine history, Endocrinesyndromes, Senior age 📌 Pathophysiology•Tumour cells produce excess bioactive amines(e.g. serotonin, histamine, bradykinin)•If liver metastases are present, these hormones bypass hepatic metabolism,leading to carcinoid syndrome•Chronic hormone exposure can lead to complications like carcinoid heart disease (right-sided valve fibrosis) 📌 Symptoms•Often asymptomatic initially•When symptomatic:Flushing (sudden facial redness)DiarrhoeaWheezing/bronchospasmPalpitationsCarcinoid heart disease (tricuspid regurgitation)Abdominal pain🧠 Mnemonic: “FLESH-D” – Flushing, Lung signs (wheeze), Elevated serotonin, Skin telangiectasias, Heart issues, Diarrhoea 📌 Differential Diagnosis•Other neuroendocrine tumours•Gastrointestinal stromal tumours (GISTs)•Systemic mastocytosis•Medullary thyroid cancer•Menopause•Anaphylaxis, asthma, COPD•IBS, IBD, gastroenteritis (for diarrhoea) 📌 Diagnosis•Biochemical tests:24-hour urinary 5-HIAA (serotonin metabolite)Chromogranin A – marker for NETs • Imaging:CT/MRI for localisationSomatostatin receptor scintigraphy (e.g. Octreoscan, Ga-DOTATATE PET)• Endoscopy/Biopsy: Histology confirms diagnosis • Bronchoscopy: If bronchial origin suspected🧠 Tip: “See the hormones, see the body, see the tumour” – tests in 3 tiers 📌 Management•Surgical resection – preferred forlocalised tumours•Somatostatin analogues (e.g. Octreotide, Lanreotide)– control hormone release and symptoms•Interferon alpha, chemotherapy or targeted radionuclide therapy (e.g. PRRT) foradvanced disease•Symptom relief: Antidiarrhoeals, dietarytriggers avoidance•Management of complications (e.g. valvesurgery for carcinoid heart disease)•Pre-op Octreotide infusion to prevent carcinoid crisis 📌 Complications•Carcinoid syndrome•Carcinoid heart disease(tricuspid/pulmonary valve fibrosis)•Carcinoid crisis (life-threateninghormone surge, triggered by stress/procedures)•Metastatic spread (especially to liver)•Niacin deficiency → Pellagra: Dermatitis,Diarrhoea, Dementia 📌 Prognosis•Highly variable – depends on tumour location, metastasis, response to treatment•Localised small bowel tumours: ~170-month median survival•Regional spread: ~145 months•Liver metastases: >100 months possible with aggressive management•Bronchial carcinoids: 5-year survival~96%🧠 Key Point: Early diagnosis and multi-modal treatmentsignificantly improve outcomes 📎 More MSRA Resources for CarcinoidTumours📝 Revision Notes: https://www.passthemsra.com/topic/carcinoid-tumours-revision-notes/🧠 Flashcards: https://www.passthemsra.com/topic/carcinoid-tumours-flashcards/💬 Accordion Q&A Notes: https://www.passthemsra.com/topic/carcinoid-tumours-accordion-qa-notes/🚀 Rapid Quiz: https://www.passthemsra.com/topic/carcinoid-tumours-rapid-quiz/🎓 Full Course: https://www.passthemsra.com/courses/gastroenterology-for-the-msra/ Hashtags#MSRA#MSRARevision #MSRATextbook #MSRAQuiz #MSRAQuestionBank #MSRAFlashcards#MSRAQ&ANotes #MSRAAccordions #MultiSpecialityRecruitmentAssessment#MSRAOnlineRevision #MSRARevisionWebsite #CarcinoidTumours