Welcome to our alphabetical list of diseases A-Z (don’t worry, it’s not contagious). Below, you’ll find a comprehensive overview of over 300 diseases, syndromes, infections, viruses, and more to study and research. Plus, as a bonus, scroll to the bottom of the page for trivia questions like: “How many diseases exist?” “What disease starts with Z?” “What was the deadliest disease in history?” and “What diseases cannot be cured?” From Acne to Zika Virus, this alphabetical list of diseases A-Z has it all. So whether you’re studying for an anatomy class, brushing up on trivia, or are simply interested in health topics, keep reading for more!
A
Acne
Acromegaly
Acute Lymphoblastic Leukemia
Acute Myeloid Leukemia
Addison’s Disease
Adenovirus Infection
Adrenal Insufficiency
Agnosia
Alcoholism
Allergic Rhinitis
Alopecia Areata
Alport Syndrome
ALS (Amyotrophic Lateral Sclerosis)
Alzheimer’s Disease
Amblyopia
Amnesia
Amyotrophic Lateral Sclerosis (ALS)
Anal Fissure
Anemia
Aneurysm
Ankylosing Spondylitis
Anthrax
Aortic Aneurysm
Aphasia
Aplastic Anemia
Appendicitis
Arrhythmia
Arthritis
Asbestosis
Asperger Syndrome
Aspergillosis
Asthma
Ataxia
Atherosclerosis
Atopic Dermatitis
Attention Deficit Hyperactivity Disorder (ADHD)
Autism Spectrum Disorder
Autoimmune Hepatitis
B
Bacterial Meningitis
Barrett’s Esophagus
Basal Cell Carcinoma
Bell’s Palsy
Biliary Atresia
Binge Eating Disorder
Bipolar Disorder
Bladder Cancer
Blepharitis
Botulism
Bovine Spongiform Encephalopathy (Mad Cow Disease)
Brain Tumor
Breast Cancer
Bronchiectasis
Bronchitis
Brucellosis
Brugada Syndrome
Bursitis
C
Cancer
Candidiasis
Carpal Tunnel Syndrome
Cat Scratch Disease
Celiac Disease
Cerebral Palsy
Cervical Cancer
Cervicitis
Chagas Disease
Charcot-Marie-Tooth Disease
Chikungunya
Cholera
Chronic Fatigue Syndrome
Chronic Kidney Disease
Chronic Myeloid Leukemia
Chronic Obstructive Pulmonary Disease (COPD)
Cirrhosis
Clostridium Difficile Infection
Cluster Headaches
Coeliac Disease
Colorectal Cancer
Compartment Syndrome
Conjunctivitis
COVID-19
Crohn’s Disease
Cushing’s Syndrome
Cutaneous T-cell Lymphoma
Cystic Fibrosis
Cytomegalovirus Infection
D
De Quervain’s Tenosynovitis
Dengue Fever
Depression
Dermatitis
Diabetes
Diabetic Neuropathy
Diabetic Retinopathy
Diphtheria
Down Syndrome
Dysentery
Dystonia
E
Ebola Virus Disease
Eclampsia
Ectopic Pregnancy
Ehlers-Danlos Syndrome
Emphysema
Endocarditis
Endometriosis
Enterovirus Infection
Eosinophilic Esophagitis
Epilepsy
Erythema Infectiosum (Fifth Disease)
Erythema Multiforme
Essential Tremor
Ewing’s Sarcoma
F
Facial Palsy
Familial Hypercholesterolemia
Fanconi Anemia
Fasciitis
Felty Syndrome
Fetal Alcohol Spectrum Disorders (FASD)
Fibromyalgia
Fifth Disease (Erythema Infectiosum)
Flu (Influenza)
Friedreich’s Ataxia
Frontotemporal Dementia
G
Galactosemia
Gallstones
Gastroenteritis
Gastroesophageal Reflux Disease (GERD)
Giant Cell Arteritis
Giardiasis
Gilbert’s Syndrome
Gingivitis
Glaucoma
Gonorrhea
Gout
Granulomatosis with Polyangiitis
Guillain-Barré Syndrome
H
Hand, Foot, and Mouth Disease
Hashimoto’s Thyroiditis
Head and Neck Cancer
Heart Disease
Helicobacter Pylori Infection
Hemochromatosis
Hemophilia
Hepatitis
Hepatocellular Carcinoma
Hereditary Angioedema
Herpes
Hidradenitis Suppurativa
HIV/AIDS
Huntington’s Disease
Hydrocephalus
Hypersensitivity Pneumonitis
Hypertension
Hyperthyroidism
I
Idiopathic Pulmonary Fibrosis
Impetigo
Infective Endocarditis
Influenza
Insomnia
Interstitial Cystitis
Intracranial Hypertension
Irritable Bowel Syndrome (IBS)
J
Jaundice
Juvenile Idiopathic Arthritis
K
Kawasaki Disease
Keratoconus
Kidney Stones
Klinefelter Syndrome
L
Labyrinthitis
Lactose Intolerance
Laryngeal Cancer
Leprosy
Leukemia
Lichen Planus
Lung Cancer
Lupus
Lyme Disease
Lymphoma
M
Madelung’s Disease
Malaria
Marfan Syndrome
Mastocytosis
Measles
Melanoma
Ménière’s Disease
Meningitis
Migraine
Molluscum Contagiosum
Mononucleosis
Multiple Sclerosis (MS)
Muscular Dystrophy
Myasthenia Gravis
Myelodysplastic Syndromes
Myelofibrosis
Myocardial Infarction (Heart Attack)
Myositis
N
Narcolepsy
Necrotizing Fasciitis
Nephritis
Neuroblastoma
Neurofibromatosis
Niemann-Pick Disease
Non-Hodgkin Lymphoma
O
Optic Neuritis
Oral Cancer
Orchitis
Osgood-Schlatter Disease
Osteoarthritis
Osteogenesis Imperfecta
Osteoporosis
P
Paget’s Disease of Bone
Pancreatitis
Parathyroid Disease
Parkinson’s Disease
Pelvic Inflammatory Disease (PID)
Pemphigus
Peptic Ulcer Disease
Pernicious Anemia
Pertussis (Whooping Cough)
Pheochromocytoma
Phlebitis
Pityriasis Rosea
Pneumoconiosis
Pneumonia
Polio
Pott Disease (Spinal Tuberculosis)
Primary Biliary Cholangitis
Primary Sclerosing Cholangitis
Prostate Cancer
Psoriasis
Psoriatic Arthritis
Pulmonary Embolism
Pyelonephritis
Q
Q Fever
R
Rabies
Raynaud’s Disease
Reactive Arthritis
Renal Cell Carcinoma
Restless Legs Syndrome
Retinal Detachment
Reye’s Syndrome
Rhabdomyosarcoma
Rheumatic Fever
Rheumatic Heart Disease
Rheumatoid Arthritis
Rickets
Rocky Mountain Spotted Fever
Rosacea
Rotavirus Infection
Rubella
S
Sarcoidosis
SARS (Severe Acute Respiratory Syndrome)
Scabies
Scarlet Fever
Schizophrenia
Sciatica
Scleroderma
Scurvy
Seborrheic Dermatitis
Sepsis
Septic Arthritis
Shigellosis
Shingles (Herpes Zoster)
Sickle Cell Disease
Sjogren’s Syndrome
Skin Cancer
Sleep Apnea
Smallpox
Spina Bifida
Spinocerebellar Ataxia
Splenomegaly
Stevens-Johnson Syndrome
Stomach Cancer
Strep Throat
Sturge-Weber Syndrome
Subarachnoid Hemorrhage
Syphilis
Systemic Lupus Erythematosus (SLE)
T
Takayasu’s Arteritis
Temporal Arteritis
Tetanus
Thalassemia
Thrombocytopenia
Thrombophlebitis
Thyroid Disease
Tinnitus
Tourette Syndrome
Toxoplasmosis
Trichinosis
Trigeminal Neuralgia
Tuberculosis
Turner Syndrome
Typhoid Fever
U
Ulcerative Colitis
Urinary Tract Infection (UTI)
Urticaria (Hives)
Uterine Cancer
V
Varicella (Chickenpox)
Vasculitis
Vertigo
Viral Hepatitis
Viral Meningitis
Vitiligo
Von Willebrand Disease
Vulvodynia
W
Wegener’s Granulomatosis
West Nile Virus
Whipple’s Disease
Whooping Cough (Pertussis)
Wilson’s Disease
Wiskott-Aldrich Syndrome
X
Xeroderma Pigmentosum
Y
Yellow Fever
Z
Zadik–Barak–Levin Syndrome
Zamzam–Sheriff–Phillips Syndrome
Zechi-Ceide Syndrome
Zellweger Syndrome
Zenker’s Diverticulum
Zieve’s Syndrome
Zika Virus
- Heart disease
- Cancer
- COVID-19
- Stroke
- Chronic lower respiratory diseases
- Alzheimer’s
- Diabetes
- Nephritis
- Cirrhosis
Zadik–Barak–Levin Syndrome
Zamzam–Sheriff–Phillips Syndrome
Zechi-Ceide Syndrome
Zellweger Syndrome
Zenker’s Diverticulum
Zieve’s Syndrome
Zika Virus
Over 26,000
COVID-19
Tuberculosis
HIV/AIDS
Malaria
Some cancers
Alzheimer’s Disease
Advanced lung, heart, kidney and liver disease
Stroke and other neurological diseases, including Multiple Sclerosis
Huntington’s Disease
Muscular Dystrophy
HIV/AIDS
- Spanish Flu
- Bubonic Plague
- HIV/AIDS
- COVID-19
- Cocoliztli
- Smallpox
- Typhus
Pulmonary Embolus
Necrotizing Fasciitis
Ischemic Bowel
Sleep Apnea
Compartment Syndrome