Gastro: Colorectal Cancer: Free MSRA Podcast

⚕️FREE MSRA PODCAST – Colorectal Cancer🎧 A comprehensive focused breakdown of one ofthe most important GI malignancies for your exams – with essential insights on red flags, screening, staging, and management. 🧠Key Learning Points📌Definition• Colorectal cancer is a malignant tumour arising from theinner lining of the colon or rectum, usually developing from adenomatous polyps over several years. 📌 Causes & Risk Factors• Sporadic (95%) – no clear mutation• Hereditary forms:HNPCC (Lynch syndrome) – autosomal dominant mutations in MLH1/MSH2FAP – mutation in APC gene → hundreds of polyps • Environmental/lifestyle:High fat / low fibre dietObesitySmokingAlcoholSedentary lifestyle• Medical conditions:IBD (Crohn’s, UC)Family history of colorectal or endometrial cancer🧠 Mnemonic: "H-FLOPS" – HNPCC/FAP, Family history, Lifestyle (diet, alcohol), Obesity, Polyps, Smoking 📌Pathophysiology• Adenoma →carcinoma sequence: Accumulation of genetic mutations (APC, KRAS, TP53) leads to polyp formation, dysplasia, invasion,and eventually metastasis (especially liver and lungs). 📌Symptoms• Right-sided tumours: Anaemia, weight loss, vague abdominal pain• Left-sided tumours: Rectal bleeding, altered bowel habits, tenesmus• General:Persistent change in bowel habitIron-deficiency anaemiaAbdo painRectal bleedingWeight lossFatigue🧠 Mnemonic: "BLOOD C" – Bowel change, Loss of weight, Obstruction, Outrunning iron (anaemia), Discomfort (pain), Cramping/constipation📌Differential Diagnoses• IBD (Crohn's/UC)• IBS• Diverticulitis• Haemorrhoids• Benign polyps• Ischaemic colitis• GI stromal tumours• Anal/rectal cancer 📌Diagnosis• Colonoscopy with biopsy – gold standard• Staging:CT CAP (colon)MRI pelvis (rectal)CEA marker (baseline, monitoring• TNM staging:T – depth of invasionN – lymph node spreadM – metastasis (esp. liver/lungs)🧠 Tip: “See it, Sample it, Scan it, Stage it” → Colonoscopy, Biopsy, Imaging, TNM 📌Management• Surgery – mainstay for localised diseaseHemicolectomy, anterior/AP resectionTME (Total Mesorectal Excision) for rectal cancers • Chemotherapy – adjuvant in Stage III or high-risk Stage II• Radiotherapy – mainly for rectal cancer (neoadjuvant or adjuvant)• Targeted therapies:EGFR inhibitors (cetuximab) → only if RAS wild-typeBevacizumab (anti-VEGF)Immunotherapy for MSI-high tumours • Follow-up: CT scans, CEA, regular surveillance🧠 Treatment Strategy: “Resect, Reduce, React” – Remove tumour, Reduce recurrence, React to complications 📌Complications• Local: Bowel obstruction, perforation, bleeding• Metastatic: Liver, lungs• Recurrence• Treatment-related:Surgical complicationsStoma issuesChemo/radiotherapy side effects (neuropathy, diarrhoea, fatigue) 📌Prognosis• Heavily stage-dependent:Stage I–II: ~90% 5-year survivalStage III: ~70%Stage IV: ~15% • UK overall: ~50–60% survive 5+ yearsCritical Insight: Early detection = survival → screening makes a massive difference 📌Screening & Prevention• FIT test – national screening (age >50)• Colonoscopy if positive or high-risk history• Lifestyle modifications:Diet: High fibre, low red/processed meatPhysical activitySmoking/alcohol cessation • Aspirin/NSAIDs – may reduce polyp risk 📎More MSRA Resources for Colorectal Cancer📝Revision Notes: https://www.passthemsra.com/topic/colorectal-cancer-revision-notes-2/🧠Flashcards: https://www.passthemsra.com/topic/colorectal-cancer-flashcards-2/💬Accordion Q&ANotes: https://www.passthemsra.com/topic/colorectal-cancer-accordion-qa-notes-2/🚀Rapid Quiz: https://www.passthemsra.com/topic/colorectal-cancer-rapid-quiz-2/🎓Full Course: https://www.passthemsra.com/courses/gastroenterology-for-the-msra/ #MSRA #MSRARevision#ColorectalCancerMSRA #MSRAFlashcards #GastroenterologyMSRA #NICEGuidelines#MSRAExam #MSRAStudyMaterials #MedicalEducation #MSRAOnlineRevision #MultiSpecialtyRecruitmentAssessment