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Circle of Willis - Figure

Table of Contents

*About this update
- *About this update
List of Editors
- List of Editors
Allergy Immunology
- Acute Inflammation
- Allergic Rhinitis
- Allergies
- Allergy Immunology
- Apoptosis
- Building-Related Illness
- Chemokines
- Chronic Inflammation
- Cytokines
- Eosinophilia
- Food Allergies
- Hypersensitivity Reactions
- Immunotherapy
- Ischemia and Necrosis
- Lymphadenopathy
- Lymphocytes
- Mast Cell Disease
- Occupational Asthma
- Pruritus
- Spleen
- Transplantation Immunology
Cardiology
- Acute Coronary Syndromes
- Aortic Valve Disease
- Arrhythmia Treatment
- Arrhythmias
- Atrial Fibrillation
- Atrial Myxoma
- Bradyarrhythmias
- CAD Evaluation
- Cardiac Transplantation
- Cardiology
- Cardiomyopathy
- Chronic Congestive Heart Failure (CHF)
- Congenital Heart Disease
- Coronary Artery Bypass Grafting
- ECG Abnormalities
- ECG Analysis
- Heart Failure Treatment
- Heart Sounds
- Heart Valve Replacement
- Hypertensive Crisis
- Hypertensive Emergency
- Hypotension
- Long QT Syndromes
- Major Studies in Cardiology
- MI-Complications
- MI-Diagnosis
- MI-Risk and Pathogenesis
- Mitral Valve Disease
- MI-Treatment
- MI-Treatment 2
- Myocardial Ischemia
- Myocarditis
- Pacemakers
- Percutaneous Coronary Interventions
- Pericardial Disease
- Pericardial Tamponade
- Premature Beats
- Rheumatic Heart Disease
- Supraventricular Tachycardia
- Syncope
- Tricuspid Valve Disease
- Ventricular Arrhythmias
Dermatology
- Acne Vulgaris
- Alopecia
- Atopic Dermatitis
- Benign Skin Tumors
- Bullous Pemphigoid
- Common Dermatologic Syndromes
- Cutaneous Drug Reactions
- Cutaneous Mycoses
- Dermal-epidermal Junction
- Dermatologic Immunology
- Dermatology
- Erythema Multiforme
- Erythema Nodosum
- Melanocytes
- Nail Abnormalities
- Overview of Dermatology
- Pemphigus Vulgaris
- Photobiology
- Pityriasis Rosea
- Psoriasis
- Pyoderma Gangrenosum
- Rosacea
- Scabies
- Structure and Function of Skin
- Urticaria
Differential Diagnosis
- A-a Gradient
- Abdominal Mass Differential
- Abdominal Pain Differential
- Abnormal Blood Counts
- Abnormal Puberty Differential
- Acidosis Differential
- Afferent Pupillary Defect Differential
- Akinesis Differential
- Alkalosis Differential
- Alopecia Differential
- Amenorrhea Differential
- Anemia Differential
- Angina Differential
- Anisocoria Differential
- Aortic Disease Differential
- Aphthous Ulcer Differential
- Arthritis Differential
- Ascites Differential
- Ataxia Differential
- Atopic Dermatitis Differential
- Atrial Fibrillation Differential
- Brain Lesions Differential
- Cardiomyopathy Differential
- Chondrocalcinosis Differential
- Coagulopathy Differential
- Confusion Differential
- Diarrhea Differential
- Differential Diagnosis
- Dizziness Differential
- Dyspnea Differential
- Edema Differential
- Electrolyte Abnormalities
- Erythema Differential
- Failure to Thrive Differential
- Fever Differential
- Fever of Unknown Origin Differential
- Gastrointestinal Bleeding Differential
- Genital Lesions Differential
- Gynecomastia Differential
- Head and Neck Mass Differential
- Headache Differential
- Hearing Loss Differential
- Hematuria Differential
- Hemoptysis Differential
- Hepatitis Differential
- Hernia Diffential
- Hip Pain Differential
- Hydrocephalus Differential
- Hypercoagulability Differential
- Hyperthermia Differential
- Hypoalbuminemia Differential
- Jaundice Differential
- Joint Swelling Differential
- Leukocoria Differential
- Leukoencephalopathy Differential
- Low Back Pain Differential
- Lymphadenitis Differential
- Malaise Differential
- Male Infertility Differential
- Mediastinal Mass Differential
- Mental Status Changes Differential
- Monoclonal Gammopathy Differential
- Muscle Problems Differential
- Myocarditis Differential
- Nasal Ulcers Differential
- Nausea and Vomiting Differential
- Neuropathy Differential
- Palpitations Differential
- Pancoast Syndrome Differential
- Pancreatitis Differential
- Panniculitis Differential
- Parotitis Differential
- Pelvic Pathology Differential
- Pericarditis Differential
- Pneumonitis Differential
- Proteinuria Differential
- Pulmonary - Differential
- Red Eye Differential
- Respiratory Failure Differential
- Sedimentation Rate Differential
- Seizure Differential
- Sepsis Syndrome Differential
- Serum Enzyme Abnormalities
- Short Stature Causes
- Shoulder Pain Differential
- SIADH Differential
- Skin Lesions Differential
- Stomatitis Differential
- Stroke Differential
- Syncope Differential
- Testicular Problems
- Tic Differential
- Tracheal Stenosis Differential
- Tremor Differential
- Urinary Bladder Mass Differential
- Uterine Bleeding Differential
- Venous Thrombosis Differential
- Ventricular Hypertrophy Differential
- Weight Changes Differential
Endocrine Bone
- Acromegaly
- Adrenal Insufficiency
- Adrenal Mass
- Bone Disease
- Bone Structure
- Cushing's Syndrome
- Diabetes Mellitus Type 1
- Diabetes Mellitus Type 2
- Diabetic Ketoacidosis
- DM Type 2 Treatment
- Endocrine Bone
- Fractures
- Grave's Disease
- Growth Hormone Deficiency
- Hereditary Bone Disease
- Hirsutism
- Hyperaldosteronism
- Hyperparathyroidism
- Hyperthyroidism
- Hypertrophic Osteoarthropathy
- Hypogonadism
- Hypoparathyroidism
- Hypopituitarism
- Infertility
- Insulin Resistance Syndromes
- Iron Metabolism
- Lipodystrophies
- Obesity
- Osteonecrosis
- Osteoporosis
- Osteoporosis Treatment
- Pancreas Transplantation
- Polyendocrine Failure
- Renal Osteodystrophy
- SIADH
- Stress Response Pathways
- Thyroid Disease
- Thyroiditis
Gastroenterology
- Achalasia
- Alcoholic Hepatitis
- Anorectal Problems
- Appendicitis
- Ascites
- Autoimmune Hepatitis
- Bacterial Cholangitis
- Bacterial Peritonitis
- Budd-Chiari Syndrome
- Celiac Disease
- Cholestatic Liver Disease
- Chronic Gastritis
- Chronic Hepatitis
- Cirrhosis
- Clostridium difficile Diarrhea
- Colonic Polyps
- Congenital GI Obstruction
- Constipation
- Crohn's Disease
- Diarrhea
- Diseases of the Stomach
- Diverticulitis
- Endoscopy
- Esophageal Disease
- Esophageal Diverticulum
- Esophageal Dysmotility
- Esophageal Perforation
- Esophageal Varices
- Fulminant Hepatitis
- Gallstones
- Gastroenterology
- Gastrointestinal Bleeding
- Hepatic Cyst
- Hepatic Encephalopathy
- Hepatopulmonary Syndrome
- Hernia
- Inflammatory Bowel Disease Overview
- Intestinal Obstruction
- Irritable Bowel Syndrome
- Lactose Intolerance
- Liver Abscess
- Liver Biopsy
- Liver Mass
- Liver Transplantation
- Malabsorption
- Mesenteric Ischemia
- Nausea
- Ostomy
- Pancreatitis
- Peptic Ulcer
- Peptic Ulcer Disease
- Primary Biliary Cirrhosis
- Reflux Esophagitis
- Sclerosing Cholangitis
- Traveler's Diarrhea
- Ulcerative Colitis
- Viral Hepatitis
Genetic Disease
- A1-Antitrypsin Deficiency
- ALPS
- Bartter Syndrome
- Common Variable Immunodeficiency
- Congenital Adrenal Hyperplasia
- Cystic Fibrosis
- Down Syndrome
- Ehlers-Danlos Syndrome
- Epileptic Syndromes
- Familial Hypercholesterolemia
- Fever Syndromes
- Gene Therapy
- Genetic Disease
- Genetic Diseases
- Glycogen Storage Diseases
- Hemochromatosis
- Hereditary Hemorrhagic Telangiectasia
- Hyperhomocystinemia
- Hyper-IgD Syndrome (HIDS)
- Hypertrophic Cardiomyopathy
- Immunodeficiency Diseases
- Kallmann Syndrome
- Lysosomal Storage Diseases
- Marfan Syndrome
- Membrane Transport Disorders
- Metabolic Errors
- Mitochondrial Disease
- Muscular Dystrophy
- Periodic Paralysis
- Porphyria
- Severe Acute Respiratory Syndrome
- Tay-Sachs Disease
- TNF-Receptor associated periodic syndrome
- Wilson's Disease
Hematology Oncology
- Acute Lymphoblastic Leukemia
- Acute Myeloid Leukemia
- Acute Promyelocytic Leukemia
- Anal Cancer
- Anemia Introduction
- Aplastic Anemia
- Blood Cell Transplantation
- Bone Tumors
- Brain Tumors
- Breast Cancer
- Breast Cancer Therapy
- Cancer Genes
- Cancer of Unknown Primary
- Cancer Pain
- Carcinoids
- Castleman's Disease
- Cervical Cancer
- Cholangiocarcinoma
- Chronic Lymphocytic Leukemia
- Chronic Myeloid Leukemia
- Clotting Pathways
- Coagulopathies
- Colon Cancer
- Erythrocyte Abnormalities
- Erythrocyte Sedimentation Rate
- Erythrocytes
- Esophageal Cancer
- Familial Cancer Syndromes
- Gastric Cancer
- Gastrinoma
- Hairy Cell Leukemia
- Head and Neck Cancer
- Hematology Introduction
- Hematology Oncology
- Hemoglobin SC Disease
- Hemolytic Anemia
- Hemophilias
- Hepatocellular Cancer
- Histiocytosis
- Hodgkin's Lymphoma
- Immune Thrombocytopenic Purpura
- Islet Cell Tumors
- Kaposi Sarcoma
- Leukostasis
- Lung Cancer
- Malignant Skin Tumors
- Melanoma
- Mesothelioma
- Microangiopathic Hemolytic Anemia
- Multiple Endocrine Neoplasia
- Multiple Myeloma
- Myelodysplastic Syndromes
- Myeloproliferative Syndromes
- Neck Mass
- Neuroblastoma
- Neutropenia
- Non-Hodgkin's Lymphoma
- Oncology Introduction
- Ovarian Cancer
- Ovarian Germ Cell Neoplasia
- Pancreatic Cancer
- Paraneoplastic Syndromes
- Parathyroid Carcinoma
- Paroxysmal Nocturnal Hemoglobinuria
- Pheochromocytoma
- Pituitary Tumors
- Platelets
- POEMS Syndrome
- Prostate Cancer
- Prostate Cancer Therapy
- Pure Red Cell Aplasia
- Radiation Therapy
- Renal Cancer
- Retinoblastoma
- Sickle Cell Anemia
- Soft Tissue Sarcomas
- Spherocytosis
- Spinal Cord Compression
- T Cell Lymphoma
- Testicular Cancer
- Thalassemia
- Thrombocythemia
- Thrombocytopenia
- Thymoma
- Thyroid Cancer
- Transfusion Medicine
- Tumor Lysis Syndrome
- Tumor Markers
- Urinary Bladder Cancer
- Uterine Cancer
- Venoocclusive Disease
- Waldenstrom's Macroglobulinemia
Infectious Disease
- Acute Pharyngitis
- Amebiasis
- Animal Bites
- Anthrax
- Antibacterial Resistance
- Aspergillus
- Atypical Mycobacteria
- Bacterial Pathogens
- Bartonella
- Brain Abscess
- Brucella
- Candida
- Cellulitis
- Chagas Disease
- Chlamydia
- Cholera
- Cold Viruses
- Cryptococcus
- Cytomegalovirus
- Ehrlichiosis
- Encephalitis
- Endocarditis
- Enteric Viruses
- Enterococcus
- Epididymitis
- Epidural Abscess
- Epiglottitis
- Epstein Barr Virus
- Fever of Unknown Origin
- Food-Borne Illness
- Fungal Infections
- Giardiasis
- Group A Streptococcus
- Group B Streptococcus
- Hantavirus Pulmonary Syndrome
- Helicobacter pylori
- Helminths
- Hepatitis A Virus
- Hepatitis B Virus
- Hepatitis C Virus
- Hepatitis E Virus
- Herpesviruses
- Histoplasmosis
- HIV
- HIV Part 2
- Human Papilloma Virus
- Immunosuppression and Infection
- Infectious Disease
- Influenza
- Leprosy
- Lyme Disease
- Lymphadenitis
- Malaria
- Meningitis
- Meningococcemia
- Monkeypox
- Mucormycosis
- Nocardia
- Nosocomial Infections
- Orchitis
- Osteomyelitis
- Otitis Externa
- Otitis Media
- Pandemic Influenza
- Parvovirus
- Periorbital Cellulitis
- Peritonsillar Abscess
- Pertussis
- Pharyngitis
- Plague
- Pneumococcus
- Pneumocystis jiroveci
- Pneumonia - Evaluation
- Pneumonia - Organisms
- Prostatitis
- Protozoa
- Q Fever
- Rabies
- Respiratory Syncytial Virus
- Retroviruses
- Rickettsial Diseases
- Schistosomiasis
- Scrotal Pain
- Sepsis
- Severe Acute Respiratory Syndrome (Infectious Disease)
- Sexually Transmitted Diseases
- Sinusitis
- Skin and Soft Tissue Infections
- Smallpox
- Staphylococci
- Surgical Antibiotic Prophylaxis
- Syphilis
- Tetanus
- Tick-Borne Diseases
- Tonsillitis
- Toxic Shock Syndrome
- Tuberculosis
- Urinary Tract Infection
- Varicella Zoster Virus
- Viral Exanthematous Disease
- Viral Hemorrhagic Fever
- Whipple's Disease
Nephrology
- Acid-Base Disorders
- Acidosis
- Acute Renal Failure
- Acute Tubular Necrosis
- Alkalosis
- Autonomic Dysreflexia
- Botulism
- Chronic Renal Failure
- Diabetes Insipidus
- Diabetic Nephropathy
- Dialysis
- Edema
- Fluid Regulation
- Fluid Replacement
- Genitourinary Evaluation
- Glomerulonephritis
- Goodpastures syndrome
- Hematuria
- Hepatorenal Syndrome
- Hypercalcemia
- Hyperkalemia
- Hypernatremia
- Hypocalcemia
- Hypokalemia
- Hyponatremia
- IgA Nephropathy
- Interstitial Nephritis
- Kidney Stones
- Kidney Transplantation
- Lupus Nephritis
- Magnesium
- Membranous Nephropathy
- Minimal Change Nephropathy
- Nephrology
- Nephrotic Syndrome
- Pediatric Nephrology
- Phosphorus
- Polycystic Kidney Disease (PKD)
- Radiocontrast Nephropathy
- Renal Artery Stenosis
- Renal Deposition Disease
- Renal Disease and Vasculitis
- Renal Pathology
- Renal Tubular Dysfunction
- Renal Tubular Function
- Renal Vascular Disease
- Rhabdomyolysis
- Urinary Tract Obstruction
Neurology/Ophthalmology
- Amyotrophic Lateral Sclerosis
- Aphasia
- Autonomic Nervous System
- Autonomic Neuropathy
- Bell's Palsy
- Blurred Vision
- Brain Neuroanatomy
- Cataracts
- Causes of Blindness
- Choroidal Melanoma
- CIDP
- CNS and Hyponatremia
- Coma
- Conjunctivitis
- Demyelinating Diseases
- Developmental Neuropathology
- Diabetic Retinopathy
- Dyslexia
- Dystonia
- Entrapment Neuropathies
- Facial Pain
- Glaucoma
- Guillain-Barre Syndrome
- Hearing Loss
- Hemorrhagic Stroke
- HIV CNS Disease
- Huntington's Disease
- Macular Degeneration
- Memory
- Migraine
- Multiple Sclerosis
- Myasthenia Gravis
- Nervous System Histology
- Neurodegenerative Diseases
- Neurogenic Bladder
- Neuroleptic Malignant Syndrome
- Neurological Disease Overview
- Neurology/Ophthalmology
- Neuropathy and Myopathy
- Ocular Neuromuscular Disorders
- Ocular Trauma
- Ophthalmology Introduction
- Optic Nerve Syndromes
- Orbital Cellulitis
- Pain
- Peripheral Neuropathy
- Red Eye
- Retinal Detachment
- Retinal Vascular Disease
- Retinoblastoma (Neurology/Ophthalmology)
- Seizure Therapy
- Seizures
- Spinal Cord Neuroanatomy
- Spongiform Encephalopathies
- Strabismus
- Stroke
- Stroke Treatment
- Subarachnoid Hemorrhage
- Subdural Hematoma
- Systemic Disease and The Eye
- Transverse Myelopathy
- Tremor
- Uveitis
- Vertigo
Obstetrics Gynecology
- Amenorrhea
- Asthma in Pregnancy
- Bleeding in Pregnancy
- Breast Disease
- Diabetes in Pregnancy
- Ectopic Pregnancy
- Endometriosis
- Fallopian Tube and Ovary
- Female Sexual Dysfunction
- Fetal Testing
- Gynecologic Infections
- Gynecologic Pathology
- Heart Valve Disease in Pregnancy
- Hydrops Fetalis
- Hypertension in Pregnancy
- Labor
- Leiomyomas
- Liver and GI Disease in Pregnancy
- Maternal Fetal HIV Disease
- Medical Abortion
- Medications in Pregnancy
- Menopause
- Menstrual Cycle
- Obstetrics Gynecology
- Pap Smear
- Pelvic Pain
- Peripartum Cardiomyopathy
- Placenta
- Polycystic Ovary Syndrome (PCOS)
- Pregnancy
- Pregnancy Complications
- Premature Rupture of Membranes
- Recurrent Spontaneous Abortion
- Rheumatologic Disease and Pregnancy
- Trophoblastic Disease
- Uterine Bleeding
- Uterus
- Vulva / Vagina / Cervix
Pediatrics
- Acrodermatitis Enteropathica
- Ambiguous Genitalia
- Biliary Atresia
- Cervical Adenitis
- Childhood Immunizations
- Congenital Heart Block
- Croup
- Developmental Milestones
- Diaper Dermatitis
- Esophageal Foreign Bodies
- Ewing's Sarcoma
- Febrile Seizures
- Hirschprung Disease
- Intussusception
- Juvenile Chronic Arthritis
- Kawasaki Disease
- Lead Poisoning
- Limp in Children
- Neonatal Abdominal Mass
- Neonatal Conjunctivitis
- Neonatal Hyperbilirubinemia
- Newborn Screening
- Normal Puberty
- Pediatric Asthma
- Pediatric Pneumonia
- Pediatrics
- Precocious Puberty
- Premature Infants
- Pulmonary Embolism
- Puncture Wounds
- Recurrent Abdominal Pain
- Retinopathy of Prematurity
- Seizures in Children
- Short Stature
- SIDS
- Spina Bifida
- Testicular Torsion
- Tuberous Sclerosis
Pharmacology
- Adverse Drug Reactions
- Aminoglycosides
- Anesthesia
- Angiotensin Pharmacology
- Anti-Arrhythmic Agents
- Antifungal Agents
- Antiparasitic Agents
- Antiplatelet Agents
- Antiretroviral Therapy
- Antiviral Agents
- Beta-Adrenergic Pharmacology
- Cancer Chemotherapy
- Cancer Chemotherapy II
- Cardiac Therapeutics
- Cephalosporins
- Chemotherapy Side Effects
- Cholesterol Lowering Agents
- Diuretics
- Dopamine Pharmacology
- Drug Metabolism
- GABA Pharmacology
- Geriatric Pharmacology
- Glucocorticoids
- G-Protein Disorders
- Growth Hormone
- Hemostatic Drugs
- Heparins
- Herbal Agents
- Hormone Replacement Therapy
- Insulin
- Interferons
- Ion Channels
- Macrolides
- Minerals
- Miscellaneous Antibiotics
- Monoclonal Antibodies
- Nitric Oxide Pharmacology
- Opioid Pharmacology
- Oral Hypoglycemic Agents
- Oxygen Therapy
- Pain Management
- Penicillins
- Pharmacology
- Prostaglandin Pharmacology
- Quinolones
- Retinoid Pharmacology
- Rheumatologic Therapeutics
- Rheumatologic Therapeutics II
- Sedatives
- Serotonin Pharmacology
- Stimulants
- Tetracyclines
- Vasopressor Agents
- Vitamins
- Warfarin
Primary Care
- Acupuncture
- Alcoholism
- Cancer Screening
- Carpal Tunnel Syndrome
- Chronic Fatigue
- Clinical Trials
- Contraceptives
- Cough
- Diagnostic Tests
- Dizziness
- Drugs of Abuse
- Endocarditis Prevention
- Epistaxis
- Fecal Incontinence
- Fibromyalgia
- Foot Ulcers
- Glossitis
- Headache
- Health Screening
- Hemorrhoids
- High-Altitude Illness
- Hypercholesterolemia
- Hypertension
- Hypertension Therapy
- Low Back Pain
- Medical History
- Medical Literature Interpretation
- Multivariable Analysis
- Muscle Problems
- Neck Pain
- Nuclear Medicine
- Overuse Injuries
- Palliative Care
- Palpitations
- Physical Examination
- Preoperative Evaluation
- Pressure Ulcers
- Primary Care
- Prostatic Hyperplasia
- Radiology Introduction
- Routine Prevention
- Smoking
- Stroke Prevention
- Traumatic Wounds
- Traveler's Medicine
- Urinary Incontinence
- Vaccinations
Psychiatry
- ADHD
- Alzheimer's Disease
- Anorexia and Bulimia
- Anxiety
- Autism
- Behavioral Disorders
- Bipolar Disorder
- Borderline Personality Disorder
- Delirium
- Dementia
- Depression
- Depression Treatment
- Functional Somatic Syndromes
- Mental Status Exam
- Obsessive-Compulsive Disorder
- Psychiatry
- Psychosis
- Schizophrenia
- Seasonal Affective Disorder
- Sleep Disorders
- Suicide
Pulmonary Critical Care
- Acute Bronchitis
- Acute Respiratory Distress Syndrome (ARDS)
- Alcohol Intoxication
- Anesthesia (Pulmonary Critical Care)
- ARDS
- Arterial Blood Gas
- Asthma
- Asthma Treatment
- Bronchiectasis
- Bronchiolitis Obliterans
- Bronchitis
- Burn Injuries
- Calcium Channel Blocker Overdose
- Carbon Monoxide Poisoning
- Cardiac Arrest
- Chemical Toxins
- Chronic Obstructive Pulmonary Disease
- Chronic Obstructive Pulmonary Disease Exacerbation
- Cocaine Abuse
- Congenital Pulmonary Anomalies
- COPD
- COPD Exacerbation
- Digitalis Overdose
- Frostbite
- Gas Embolism
- Heat Stroke
- Hypothermia
- Idiopathic Pulmonary Fibrosis
- Interstitial Lung Disease
- Intracranial Vault
- Lung Diseases Summary
- Lung Mass
- Lung Sounds and Function
- Lung Transplantation
- Mechanical Ventilation
- Opioid Abuse
- Organophosphate Poisoning
- Parenteral Nutrition
- Pleural Effusion
- Pneumoconiosis
- Pneumonia
- Pneumothorax
- Pulmonary Artery Catheter
- Pulmonary Critical Care
- Pulmonary Embolism
- Pulmonary Function Tests
- Pulmonary Hypertension
- Pulmonary Pathology
- Pulmonary Physiology
- Radiation Syndrome
- Refeeding Syndrome
- Salicylate Toxicity
- Sarcoidosis
- Sepsis Syndrome
- Shock
- Sleep Apnea
- Spinal Cord Injury
- Status Asthmaticus
- Status Epilepticus
- Sudden Death
- Theophylline Toxicity
- Trauma
Review Questions
- Allergy and Immunology RQ 1
- Allergy and Immunology RQ 2
- Bone RQ 1
- Bone RQ 2
- Cardiology RQ A
- Cardiology RQ B
- Cardiology RQ C
- Cardiology RQ D
- Critical Care RQ 2
- Critical Care RQ 3
- Critical Care RQ A
- Dermatology RQ 1
- Dermatology RQ 2
- Endocrinology RQ 1
- Endocrinology RQ 2
- Gastroenterology RQ 1
- Gastroenterology RQ 2
- General Medicine RQ 1
- General Medicine RQ 2
- General Medicine RQ 3
- General Medicine RQ 4
- General Medicine RQ 5
- General Medicine RQ 6
- Hematology RQ 1
- Hematology RQ 2
- Infectious Disease RQ 1
- Infectious Disease RQ 2
- Infectious Disease RQ C
- Infectious Disease RQ4
- Nephrology RQ 1
- Nephrology RQ 2
- Neurology and Ophthalmology RQ 1
- Obstetrics and Gynecology RQ 1
- Obstetrics and Gynecology RQ 2
- Oncology RQ 1
- Oncology RQ 2
- Oncology RQ C
- Pathophysiology RQ 1
- Pathophysiology RQ 2
- Pathophysiology RQ 3
- Pathophysiology RQ 4
- Pediatrics RQ 1
- Pediatrics RQ 2
- Pharmacology RQ 3
- Pharmacology RQ 4
- Pharmacology RQ 5
- Pharmacology RQ 6
- Pharmacology RQ A
- Pharmacology RQ B
- Primary Care RQ 1
- Primary Care RQ 2
- Primary Care RQ 3
- Psychiatry RQ 1
- Pulmonary RQ 1
- Pulmonary RQ 2
- Review Questions
- Rheumatology RQ 1
- Rheumatology RQ 2
- Vascular RQ 1
Rheumatology
- Acute Arthritis
- Amyloidosis
- ANCA Related Diseases
- Antinuclear Antibodies
- Antiphospholipid Syndrome
- Arthritis Classification
- Atypical Rheumatoid Arthritis
- Bacterial Arthritis
- Behcet's Syndrome
- Bursitis
- Churg-Strauss Syndrome
- Cogan Syndrome
- Cryoglobulinemia
- Eosinophilic Syndromes
- Felty Syndrome
- Foot Pain Syndromes
- Giant Cell Arteritis
- Gout
- Henoch-Schonlein Purpura
- HIV - Rheumatology
- Knee Pain Syndromes
- Lyme Arthritis
- Miscellaneous Arthritis
- Mixed Connective Tissue Disease
- Myositis
- Neoplastic Vasculitis
- Osteoarthritis
- Polyarteritis Nodosa
- Polymyalgia Rheumatica
- Polymyositis and Dermatomyositis
- Pseudogout
- Psoriatic Arthritis
- Raynaud's Disease
- Reactive Arthritis
- Reflex Sympathetic Dystrophy
- Relapsing Polychondritis
- Retroperitoneal Fibrosis
- Rheumatoid Arthritis
- Rheumatology
- Sarcoid Arthropathy
- Shoulder Pain Syndromes
- Sjogren's Syndrome
- Spondyloarthropathy
- Still's Disease
- Systemic Lupus Erythematosus
- Systemic Sclerosis
- Takayasu Arteritis
- Urticarial Vasculitis
- Vasculitis
- Viral Arthritis
- Wegener's Granulomatosis
Vascular Disease
- Aneurysms
- Angioedema
- Atherosclerosis
- Cerebrovascular Disease
- Cholesterol Emboli
- Chronic Venous Disease
- Deep Vein Thrombosis (DVT)
- DVT Treatment
- Erectile Dysfunction
- Peripheral Arterial Disease
- Superficial Thrombophlebitis
- Thromboangiitis Obliterans
- Vascular Biology
- Vascular Disease
- Vascular Disease Summary
- Wound Healing
Toxicology
- Acetaminophen Overdose
- Methanol Poisoning
- Ricin Poisoning
- Toxicology
- Tricyclic Overdose
Urology
- Hydrocele
- Urology
About OCM
- About OCM

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Circle of Willis - Figure i

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