Colorectal cancer: Clinical (To be retired)
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Colorectal cancer: Clinical (To be retired)
Medicine and surgery
Allergy and immunology
Antihistamines for allergies
Glucocorticoids
Cardiology, cardiac surgery and vascular surgery
Coronary artery disease: Clinical (To be retired)
Heart failure: Clinical (To be retired)
Syncope: Clinical (To be retired)
Hypertension: Clinical (To be retired)
Hypercholesterolemia: Clinical (To be retired)
Peripheral vascular disease: Clinical (To be retired)
Leg ulcers: Clinical (To be retired)
Adrenergic antagonists: Alpha blockers
Adrenergic antagonists: Beta blockers
ACE inhibitors, ARBs and direct renin inhibitors
Thiazide and thiazide-like diuretics
Calcium channel blockers
Lipid-lowering medications: Statins
Lipid-lowering medications: Fibrates
Miscellaneous lipid-lowering medications
Antiplatelet medications
Dermatology and plastic surgery
Hypersensitivity skin reactions: Clinical (To be retired)
Eczematous rashes: Clinical (To be retired)
Papulosquamous skin disorders: Clinical (To be retired)
Alopecia: Clinical (To be retired)
Hypopigmentation skin disorders: Clinical (To be retired)
Benign hyperpigmented skin lesions: Clinical (To be retired)
Skin cancer: Clinical (To be retired)
Endocrinology and ENT (Otolaryngology)
Diabetes mellitus: Clinical (To be retired)
Hyperthyroidism: Clinical (To be retired)
Hypothyroidism and thyroiditis: Clinical (To be retired)
Dizziness and vertigo: Clinical (To be retired)
Hyperthyroidism medications
Hypothyroidism medications
Insulins
Hypoglycemics: Insulin secretagogues
Miscellaneous hypoglycemics
Gastroenterology and general surgery
Gastroesophageal reflux disease (GERD): Clinical (To be retired)
Peptic ulcers and stomach cancer: Clinical (To be retired)
Diarrhea: Clinical (To be retired)
Malabsorption: Clinical (To be retired)
Colorectal cancer: Clinical (To be retired)
Diverticular disease: Clinical (To be retired)
Anal conditions: Clinical (To be retired)
Cirrhosis: Clinical (To be retired)
Breast cancer: Clinical (To be retired)
Laxatives and cathartics
Antidiarrheals
Acid reducing medications
Hematology and oncology
Anemia: Clinical (To be retired)
Anticoagulants: Warfarin
Anticoagulants: Direct factor inhibitors
Antiplatelet medications
Infectious diseases
Pneumonia: Clinical (To be retired)
Urinary tract infections: Clinical (To be retired)
Skin and soft tissue infections: Clinical (To be retired)
Protein synthesis inhibitors: Aminoglycosides
Antimetabolites: Sulfonamides and trimethoprim
Miscellaneous cell wall synthesis inhibitors
Protein synthesis inhibitors: Tetracyclines
Cell wall synthesis inhibitors: Penicillins
Miscellaneous protein synthesis inhibitors
Cell wall synthesis inhibitors: Cephalosporins
DNA synthesis inhibitors: Metronidazole
DNA synthesis inhibitors: Fluoroquinolones
Herpesvirus medications
Azoles
Echinocandins
Miscellaneous antifungal medications
Anti-mite and louse medications
Nephrology and urology
Chronic kidney disease: Clinical (To be retired)
Kidney stones: Clinical (To be retired)
Urinary incontinence: Pathology review
ACE inhibitors, ARBs and direct renin inhibitors
PDE5 inhibitors
Adrenergic antagonists: Alpha blockers
Neurology and neurosurgery
Stroke: Clinical (To be retired)
Lower back pain: Clinical (To be retired)
Headaches: Clinical (To be retired)
Migraine medications
Pulmonology and thoracic surgery
Asthma: Clinical (To be retired)
Chronic obstructive pulmonary disease (COPD): Clinical (To be retired)
Lung cancer: Clinical (To be retired)
Antihistamines for allergies
Bronchodilators: Beta 2-agonists and muscarinic antagonists
Bronchodilators: Leukotriene antagonists and methylxanthines
Pulmonary corticosteroids and mast cell inhibitors
Rheumatology and orthopedic surgery
Joint pain: Clinical (To be retired)
Rheumatoid arthritis: Clinical (To be retired)
Lower back pain: Clinical (To be retired)
Anatomy clinical correlates: Clavicle and shoulder
Anatomy clinical correlates: Arm, elbow and forearm
Anatomy clinical correlates: Wrist and hand
Anatomy clinical correlates: Median, ulnar and radial nerves
Anatomy clinical correlates: Bones, joints and muscles of the back
Anatomy clinical correlates: Hip, gluteal region and thigh
Anatomy clinical correlates: Knee
Anatomy clinical correlates: Leg and ankle
Anatomy clinical correlates: Foot
Acetaminophen (Paracetamol)
Non-steroidal anti-inflammatory drugs
Glucocorticoids
Opioid agonists, mixed agonist-antagonists and partial agonists
Antigout medications
Osteoporosis medications
Assessments
Colorectal cancer: Clinical (To be retired)
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Content Reviewers
Rishi Desai, MD, MPHContributors
Kara Lukasiewicz, PhD, MScBMC
Anca-Elena Stefan, MD
Sam Gillespie, BSc
Evan Debevec-McKenney
Colorectal cancer or CRC is a malignancy that arises in the large intestines, which includes both the colon and rectum. It is the most common cancer of the gastrointestinal tract, and a major cause of death and disease around the world. Most colorectal tumors develop due to sporadic mutations, but some are caused by inherited conditions like familial adenomatous polyposis and Lynch syndrome.
Individuals at high-risk for CRC include those with inflammatory bowel disease, especially ulcerative colitis, hereditary colorectal cancer syndromes, such as familial adenomatous polyposis, and those with a family history of colorectal cancer or adenomatous polyps. Individuals at medium-risk for CRC include the elderly, and those that smoke, drink alcohol, eat red meat, and are obese. Finally, well established protective factors include a high-fiber diet full of fruits and vegetables.
Sometimes, especially early on, colorectal cancer is asymptomatic and it’s discovered by screening using either stool based tests or direct visualization. One stool based test is the guaiac-based fecal occult blood test or gFOBT which detects blood in the stool. Another test is fecal immunochemical test or FIT. This time instead of guaiac, there’s an antibody that attaches to any hemoglobin that’s present in the stool. Finally there’s the FIT-DNA test-which combines FIT with a test that detects genes associated with colorectal cancer in the stool, such as mutations in the adenomatous polyposis coli gene or APC gene. One direct visualization test is a colonoscopy, which is when a camera is inserted retrograde into the colon and rectum using a flexible tube and biopsies are taken. Another one is a flexible sigmoidoscopy, which uses a flexible tube to visualize the rectum and sigmoid colon. Finally, there’s CT colonography or a virtual colonoscopy- which is where CT scans are digitally assembled to produce 3-dimensional views of the colon.
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