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Medical Conditions A-Z

Browse medical conditions alphabetically. Find information about symptoms, treatments, and related healthcare resources.

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A B C D E F G H I J K L M N O P R S T U V W X Y Z

A

Abdominal Migraine Abruptio Placentae Absence Seizure Acanthosis Nigricans Achalasia Achilles Tendon Disorders Achondroplasia Acne Acquired Immunodeficiency Syndrome Acquired Lipodystrophy Acromegaly Acute Kidney Failure Acute Mountain Sickness Acute Respiratory Distress Syndrome Addison's Disease Adenoid Cystic Carcinoma Adenosine Deaminase Severe Combined Immunodeficiency Adie's Pupil Adrenoleukodystrophy Age-Related Macular Degeneration Agenesis of Corpus Callosum Agnogenic Myeloid Metaplasia Agoraphobia Albinism Alcohol Poisoning Alcohol Use Disorder Alexander Disease Algodystrophy Algoneurodystrophy Allergies Allergies to Insect Stings Allergy to Natural Rubber Latex Alobar Holoprosencephaly Alopecia Alopecia Areata Alpha-1 Antitrypsin Deficiency Altitude Headache Amblyopia Amyotrophic Lateral Sclerosis Anaplastic Large Cell Lymphoma Ankyloglossia Anorexia Nervosa Antiphospholipid Syndrome Anxiety Disorder Aortic Aneurysm Aortic Stenosis Apert Syndrome Aphthous Stomatitis Aplasia Cutis Congenita Aplastic Anemia Appalachian Type Amyloidosis Appendiceal Cancer Appendicitis Apraxia Arachnodactyly Arachnoiditis Arginase Deficiency Argininemia Arhinencephaly Arrhythmia Arteriovenous Malformation Arthritis Asthma Ataxia Telangiectasia Atopic Dermatitis Atrial Fibrillation Atrial Septal Defect Attention Deficit Hyperactivity Disorder Attention Deficit Hyperactivity Disorder in Children Autism Autoimmune Thyroiditis Autosomal Dominant Polycystic Kidney Disease Avascular Necrosis Avian Influenza

B

B-Cell Acute Lymphoblastic Leukemia Babesiosis Back Pain Bacterial Arthritis Bacterial Meningitis Bacterial Vaginosis Baldness Balo Disease Barrett's Esophagus Bartholin's Gland Cyst Bartter Syndrome Basal Cell Carcinoma Batten Disease Behçet's Disease Bell's Palsy Benign Breast Lumps Benign Paroxysmal Positional Nystagmus Benign Prostatic Hyperplasia Bilateral Acoustic Neurofibromatosis Biliary Atresia Binge Eating Disorder Bipolar Disorder Bipolar Disorder in Children and Teens Birthmarks Black Hairy Tongue Black Widow Spider Bite Bladder Cancer Bladder Infections in Children Blepharitis Blisters Blocked Tear Ducts Bone Spurs Bone Tumor Borderline Personality Disorder Bovine Spongiform Encephalopathy Bowel Obstruction Bowen's Disease Bradycardia Brain Aneurysm Brain Cancer Brain Tumors in Adults Breast Cancer Breast Cancer in Men Breath-Holding Spells Bronchitis Brown Recluse Spider Bite Brucellosis Bubonic Plague Budd-Chiari Syndrome Buerger's Disease Bulimia Nervosa Bunions Bunyavirus Infection Burning Mouth Syndrome Burns Bursitis

C

C1 Inhibitor Deficiency CHILD Syndrome COVID-19 Calcaneal Valgus Calcinosis Calluses and Corns Campylobacteriosis Canavan Disease Cancer Carbon Monoxide Poisoning Carcinoid Syndrome Carcinoid Tumor Cardiomyopathy Carpal Tunnel Syndrome Cartilage-Hair Hypoplasia Cataracts Catatonia Celiac Disease Cellulitis Central Precocious Puberty Cerebral Palsy Cervical Cancer Cervical Ectropion Cervical Pregnancy Chagas Disease Chalazion Chanarin-Dorfman Syndrome Charcot-Marie-Tooth Disease Chiari Malformation Chickenpox Chikungunya Chikungunya Virus Infection Chilblains Childhood Depression Childhood Obesity Cholera Cholinergic Urticaria Chordoma Chronic Familial Icterus Chronic Fatigue Syndrome Chronic Kidney Disease Chronic Lymphocytic Leukemia Chronic Myeloid Leukemia Chronic Obstructive Pulmonary Disease Cicatricial Alopecia Cirrhosis Classic Galactosemia Cleft Lip Clival Chordoma Clostridium Difficile Colitis Clubfoot Cluster Headaches Coal Workers' Pneumoconiosis Coenzyme Q10 Deficiency Cold Agglutinin Disease Cold Sores Colitis Colorectal Cancer Common Cold Complex Regional Pain Syndrome Concussion Congenital Erythropoietic Porphyria Congenital Hip Dysplasia Congenital Hydrocephalus Congenital Syphilis Congestive Heart Failure Conjunctivitis Constipation Constitutional Growth Delay Coronary Artery Disease Cradle Cap Craniosynostosis Creutzfeldt-Jakob Disease Cribriform Carcinoma Crohn's Disease Croup Cryptococcal Meningitis Cushing's Syndrome Cutaneous T-Cell Lymphoma Cutis Marmorata Telangiectatica Congenita Cyclic Vomiting Syndrome in Children Cystic Fibrosis Cystic Hygroma Cystic Lung Disease Cytomegalovirus Infection

D

Dandruff Decubitus Ulcers Deep Vein Thrombosis Deerfly Fever Degenerative Disc Disease Dehydration Dengue Fever Dental Abscess Diabetes Insipidus Diabetes in Pregnancy Diabetic Eye Disease Diabetic Ketoacidosis Diabetic Kidney Disease Diabetic Macular Edema Diabetic Nephropathy Diabetic Neuropathy Diabetic Retinopathy Diamond-Blackfan Anemia Diaper Rash Diverticulitis Diverticulosis Dolichostenomelia Dowling-Meara Syndrome Down Syndrome Dracunculiasis Drug Allergies Duchenne Muscular Dystrophy Duodenal Ulcer Dupuytren's Disease Dysfunctional Uterine Bleeding Dyslexia Dysmyelogenic Leukodystrophy Dysphonia Spastica

E

E. coli Infection Ear Infection Eating Disorder, Pica Type Eaton-Lambert Syndrome Ebola Ectodermal Dysplasia, Rapp-Hodgkin Type Ectodermosis Erosiva Pluriorificialis Ectopia Cordis Ectopic Pregnancy Ectropion Eczema Edwards Syndrome Egg Allergy Ehlers-Danlos Syndrome Eisenmenger Syndrome Elephantiasis Emery-Dreifuss Muscular Dystrophy Emphysema Empty Sella Syndrome Encephalitis Endocarditis Endometrial Cancer Endometriosis Enterovirus D68 Eosinophilic Esophagitis Epicondylitis Epidemic Cerebrospinal Meningitis Epidermolysis Bullosa Epididymal Cyst Epididymitis Epilepsy Episodic Ataxia Erectile Dysfunction Erythema Infectiosum Erythema Multiforme Erythromelalgia Essential Thrombocytopenia Essential Tremor Ewing's Family of Tumors Exocrine Pancreatic Insufficiency Extragonadal Germ Cell Tumors Extrahepatic Biliary Atresia Extrauterine Pregnancy

F

Fabry Disease Facioscapulohumeral Muscular Dystrophy Factitious Disorder Imposed on Another Factitious Disorder by Proxy Fahr's Disease Fallot's Tetralogy Familial Adenomatous Polyposis Familial Alobar Holoprosencephaly Familial Chordoma Familial Cutaneous Amyloidosis Familial Dilated Cardiomyopathy Familial Emphysema Familial Hypercholesterolemia Familial Lichen Amyloidosis Familial Multiple Polyposis Familial Primary Pulmonary Hypertension Familial Tremor Fatty Liver Disease Fibrinoid Leukodystrophy Fibrodysplasia Ossificans Progressiva Fibroids Fibromyalgia Fibrous Cavernositis Fibrous Interstitial Pneumonia Fibrous Plaques of the Penis Fibrous Sclerosis of the Penis Field Fever Fifth Disease Finnish Type Amyloidosis Fissured Tongue Fitz Hugh Curtis Syndrome Flatfoot Flatulence Flesh-Eating Bacteria Flu Folate Deficiency Anemia Folic Acid Deficiency Anemia Follicular Lymphoma Folliculitis Fong Disease Food Allergies Food Poisoning Fournier Disease Fractured Rib Fractures Fragile X Syndrome Frostbite Frozen Shoulder Fulminating Hyperpyrexia Functional Ovarian Cysts Functioning Carcinoid Fungal Nail Infections Furrowed Tongue

G

Galactocerebrosidase Deficiency Galactorrhea-Amenorrhea Syndrome Galactose-1-Phosphate Uridyl Transferase Deficiency Galactosemia Gallbladder Inflammation Gallstones Ganser Syndrome Gardner Syndrome Gastric Cancer Gastric Ulcer Gastrinoma Gastritis Gastroenteritis Gastroesophageal Reflux Disease Gastrointestinal Stromal Tumors Gastroparesis Gastroschisis Gaucher Disease Generalized Anxiety Disorder (GAD)Genital Herpes Genital Warts Geographic Atrophy Geographic Tongue Gestational Diabetes Gianotti-Crosti Syndrome Giant Axonal Neuropathy Giant Cell Arteritis Giant Cell Glioblastoma Giant Cell Interstitial Pneumonia Giardiasis Gilbert Syndrome Gingivitis Glandular Plague Glaucoma Glioblastoma Multiforme Globoid Cell Leukodystrophy Glossopyrosis Goiter Gout Graft-versus-Host Disease Granuloma Annulare Graves' Disease Group B Streptococcal Infection in Newborns Group B Streptococcal Septicemia of the Newborn Grover's Disease Growth Hormone Deficiency Guillain-Barré Syndrome Gynecomastia

H

HER2-Positive Breast Cancer Hairy Tongue Hammertoe Hand, Foot, and Mouth Disease Hashimoto's Thyroiditis Hay Fever Hearing Loss Heart Attack (Myocardial Infarction)Heart Failure Helicobacter pylori Infection Hemophilia A Hemophilia B Hemorrhoids Henoch-Schonlein Purpura Hepatitis Hepatitis A Hepatitis B Hepatitis C Hepatocellular Carcinoma Hereditary Angioedema Hereditary Benign Tremor Hereditary Hemorrhagic Telangiectasia Hereditary Nonspherocytic Hemolytic Anemia Hereditary Spherocytosis Herniated Disc Herpes Zoster Hiatal Hernia Hiccups Hidradenitis Suppurativa High Altitude Illness High Cholesterol Hip Fracture Hirschsprung's Disease Hirsutism Hodgkin's Lymphoma Homocystinuria Hordeolum Horner's Syndrome Human Cyclic Neutropenia Human Cytomegalovirus Infection Human Immunodeficiency Virus Human Papillomavirus Hunter Syndrome Huntington's Disease Hurler Disease Hurler Syndrome Hutchinson-Gilford Progeria Syndrome Hutchinson-Gilford Syndrome Hydatidiform Mole Hydrocele Hydrocephalus Hygroma Colli Hyperammonemia due to Ornithine Transcarbamylase Deficiency Hypercalcemia-Supravalvar Aortic Stenosis Hypercholesterolemia Hyperemesis Gravidarum Hyperkalemia Hyperlipidemia Hypertension Hypertensive Kidney Disease Hypertriglyceridemia Hypokalemia Hypoparathyroidism Hypoplastic Left Heart Syndrome Hypotension

I

Iceland Disease Icelandic Type Amyloidosis Ichthyosis Idiopathic Aplastic Anemia Idiopathic Autoimmune Hemolytic Anemia Idiopathic Basal Ganglia Calcification Idiopathic Chronic Erosive Gastritis Idiopathic Dilated Cardiomyopathy Idiopathic Edema Idiopathic Pulmonary Fibrosis Idiopathic Thrombocytopenic Purpura IgA Nephropathy Illinois Type Amyloidosis Immune Hemolytic Anemia Immune Thrombocytopenic Purpura Immunoblastic Lymphadenopathy Impaired Glucose Tolerance Impetigo Indiana Type Amyloidosis Indolent Systemic Mastocytosis Infantile Apnea Infantile Colic Infantile Gaucher Disease Infantile Myoclonic Encephalopathy Infantile Sleep Apnea Infantile Spasms Infectious Arthritis Infectious Chorea Infectious Mononucleosis Infertility Inflammatory Bowel Disease Inherited Lipodystrophy Insomnia Interstitial Cystitis Iron Deficiency Anemia Irregular Menstrual Periods Irritable Bowel Syndrome Irritable Bowel Syndrome with Constipation Irritable Bowel Syndrome with Diarrhea Islet Cell Cancer

J

Jansen's Metaphyseal Chondrodysplasia Japanese Encephalitis Jejunal Atresia Jock Itch Jumping Frenchmen of Maine Juvenile Retinoschisis Juvenile Rheumatoid Arthritis

K

Kawasaki Disease Keratoconus Kernicterus Kidney Stones Klinefelter Syndrome Klippel-Trenaunay Syndrome Krabbe Disease

L

LEOPARD Syndrome Labyrinthitis Lactation Mastitis Lactose Intolerance Lambert-Eaton Myasthenic Syndrome Lamellar Ichthyosis Langerhans Cell Histiocytosis Latex Allergy Latrodectism Lennox-Gastaut Syndrome Lichen Amyloidosis Lichen Annularis Lichen Planus Lichen Psoriasis Lichen Sclerosus Lichen Sclerosus et Atrophicus Lichen Urticatus Lingua Villosa Nigra Lipodystrophy Lipoma Liposarcoma Lissencephaly Listeriosis Liver Cancer Localized Epidermolysis Bullosa Low Back Pain Lung Cancer Lung Carcinoid Tumors Lyme Disease Lymphangioleiomyomatosis Lymphedema Lymphoma Lysosomal Storage Disorders

M

Major Depressive Disorder (MDD)Malignant Mesothelioma Mallet Toe Malocclusion Mammary Paget's Disease Mandibular Ameloblastoma Mastitis Measles Melanoma Meningitis Meningococcal Meningitis Menopause Meralgia Paresthetica Metabolic Dysfunction-Associated Steatohepatitis Metabolic Syndrome Metastatic Breast Cancer Metastatic Melanoma Methamphetamine Use Disorder Methicillin-Resistant Staphylococcus Aureus Microangiopathic Hemolytic Anemia Middle Ear Infection Migraine Milk Allergy Miscarriage Misophonia Mitral Valve Regurgitation Mixed Connective Tissue Disease Molar Pregnancy Molluscum Contagiosum Morgagni-Turner-Albright Syndrome Morvan Disease Motion Sickness Motor Neuron Disease Mucopolysaccharidoses Mucopolysaccharidosis Type I Mucopolysaccharidosis Type II Mucous Membrane Pemphigoid Mud Fever Multifocal Motor Neuropathy Multiple Endocrine Neoplasia Multiple Myeloma Multiple Peripheral Neuritis Multiple Sclerosis Multiple Sulfatase Deficiency Multiple Symmetric Lipomatosis Multiple System Atrophy Mumps Muscular Dystrophies Myasthenia Gravis Mycosis Fungoides Myelodysplastic Syndromes Myocarditis Myopia

N

Nail-Patella Syndrome Narcolepsy Nasal Fracture Nasopharyngeal Cancer Navicular Fracture Necrotizing Enterocolitis Necrotizing Fasciitis Necrotizing Fasciitis of the Perineum Neonatal Jaundice Neonatal Listeriosis Nephrocarcinoma Nephrogenic Diabetes Insipidus Neurofibromatosis Nicotine Withdrawal Niemann-Pick Disease Night Eating Syndrome Nocardiosis Nocturnal Enuresis Non-Hodgkin Lymphoma Non-Scarring Epidermolysis Bullosa Non-Small Cell Lung Cancer Noninfectious Uveitis Nonmelanoma Skin Cancer Nonthrombocytopenic Idiopathic Purpura Noonan Syndrome Norovirus Infection Norrbottnian Gaucher Disease

O

Obesity Obsessive-Compulsive Disorder Obstructive Hypertrophic Cardiomyopathy Obstructive Sleep Apnea Ocular Motor Apraxia, Cogan Type Oculocutaneous Albinism Oculomotor Apraxia, Cogan Type Oculosympathetic Palsy Ohio Type Amyloidosis Olecranon Bursitis Onychomycosis Optic Neuromyelitis Oral Cancer Oral Galvanism Oral-Facial Dyskinesia Orofacial Dyskinesia Osgood-Schlatter Disease Osteoarthritis Osteogenesis Imperfecta Osteomyelitis Osteoporosis Ovarian Cancer Ovarian Cysts Ovarian Epithelial Cancer Ovarian Hyperthecosis Overactive Bladder Overactive Thyroid

P

POEMS Syndrome Pancreatitis Panic Disorder Parkinson's Disease Paroxysmal Nocturnal Hemoglobinuria Pediculosis Pelvic Inflammatory Disease Pemphigus Foliaceus Pericarditis Periodontal Disease Periorbital Hematoma Peripheral Artery Disease Peripheral Vascular Disease Pertussis Pfeiffer Syndrome Type 1 Phakomatosis Tuberous Sclerosis Phenylketonuria Pica Pick's Disease Pilonidal Disease Plantar Fasciitis Pleuritis Pneumonia Pneumothorax Polycystic Ovary Syndrome Polycythemia Vera Polymyalgia Rheumatica Polymyositis Pompe Disease Post-Polio Syndrome Postpartum Depression Posttraumatic Stress Disorder Prader-Willi Syndrome Precocious Puberty Prediabetes Preeclampsia Pregnancy-Induced Hypertension Premature Ejaculation Premature Ovarian Failure Premature Senility Syndrome Premenstrual Syndrome Presbyopia Presenile Tremor Syndrome Primary Amenorrhea Primary Amyloidosis Primary Biliary Cholangitis Primary Ciliary Dyskinesia Primary Cutaneous Amyloidosis Primary Immunodeficiency Primary Pulmonary Hypertension Primary Visual Agnosia Prostate Cancer Protein-Losing Gastroenteropathy Pseudofolliculitis Barbae Psoriasis Psoriatic Arthritis Pubic Lice Pudendal Neuralgia Pulmonary Arterial Hypertension Pulmonary Edema Pulmonary Embolism Pulmonary Lymphangiomyomatosis Pump Lung Purulent Arthritis

R

Rabies Rabson-Mendenhall Syndrome Radial Head Subluxation Radiation Sickness Ramsay Hunt Syndrome Rapp-Hodgkin Syndrome Raynaud's Phenomenon Reactive Arthritis Reactive Attachment Disorder Recessive X-linked Ichthyosis Rectal Cancer Rectal Prolapse Recurrent Multiple Myeloma Recurrent Pericarditis Reflex Neurovascular Dystrophy Refractory Anemia Refractory Epilepsy Reiter's Syndrome Renal Cell Carcinoma Respiratory Syncytial Virus Infection Restless Legs Syndrome Retinitis Pigmentosa Retinopathy of Prematurity Retrolental Fibroplasia Rett Syndrome Rh Sensitization During Pregnancy Rheumatoid Arthritis Rickets Ringworm Rocky Mountain Spotted Fever Rosacea Roseola Rotator Cuff Disorders Rotator Cuff Tear Rubella

S

Sacrococcygeal Chordoma Salivary Gland Infection Salmonellosis Sarcoidosis Scabies Scalded Skin Syndrome Scarlet Fever Schereshevkii-Turner Syndrome Schizoaffective Disorder Schizophrenia Sciatica Scoliosis Seasonal Affective Disorder Seasonal Allergies Seborrheic Keratosis Secondary Psychosis Secondary Pulmonary Hypertension Sepsis Severe Acute Respiratory Syndrome Severe Hearing Loss Shaken Baby Syndrome Shigellosis Short Bowel Syndrome Sickle Cell Crisis Sinusitis Sjogren's Syndrome Skin Tags Skull Base Chordoma Sleep Apnea Sleep Disorders Slipped Capital Femoral Epiphysis Slipped Disc Small Bowel Obstruction Small Intestine Cancer Small Lymphocytic Lymphoma Smallpox Social Anxiety Disorder Soft Tissue Sarcoma Spasmodic Dysphonia Spasmodic Torticollis Spermatocele Sphingolipidosis Spider Veins Spielmeyer-Vogt Disease Spielmeyer-Vogt-Batten Syndrome Spina Bifida Spinal Arachnoiditis Spinal Cord Injury Spinal Muscular Atrophy Spinal Muscular Atrophy Type I Spinal Stenosis Spinocerebellar Ataxia Squamous Cell Carcinoma Stage 4 Lung Cancer Stevens-Johnson Syndrome Strabismus Strep Throat Stroke Sturge-Weber Syndrome Subcortical Dementia Subcortical Ischemic Vascular Disease Subendocardial Sclerosis Sudanophilic Leukodystrophy Sudden Infant Death Syndrome Summer Encephalitis Sunburn Suppurative Arthritis Supraventricular Tachycardia Sweet Syndrome Sydenham's Chorea Symmastia Symptomatic Porphyria Syndactylic Oxycephaly Syphilis Syringomyelia Systemic Aleukemic Reticuloendotheliosis Systemic Lupus Erythematosus Systemic Mastocytosis

T

TORCH Infections TORCH Syndrome Takayasu Disease Takayasu's Arteritis Tardive Dyskinesia Tardive Dystonia Tardive Oral Dyskinesia Tay-Sachs Disease Temporal Arteritis Temporomandibular Disorders Temporomandibular Joint Disorder Tendinitis Tendinopathy Tennis Elbow Tenosynovitis Tension-Type Headaches Thalassemia Thiamine Deficiency Thoracic Outlet Syndrome Thromboangiitis Obliterans Thrombocytopenia Thrombophlebitis Thrombotic Thrombocytopenic Purpura Thromboulcerative Colitis Thrush Thyroid Cancer Thyroid Disorders Thyroid Nodules Thyrotoxicosis Tick Bites Tick-borne Encephalitis Tietze Syndrome Tinea Capitis Tinea Versicolor Toe Fracture Tongue Cancer Tonsillitis Tooth Decay Torsion Dystonia Torticollis Tourette Syndrome Toxic Epidermal Necrolysis Toxic Shock Syndrome Toxoplasmosis Transient Acantholytic Dermatosis Transient Ischemic Attack Transthyretin Familial Amyloid Polyneuropathy Transthyretin Methionine-30 Amyloidosis Transverse Myelitis Traveler's Diarrhea Treacher Collins Syndrome Treacher Collins-Franceschetti Syndrome 1 Trichomoniasis Trichotillomania Trigeminal Neuralgia Trisomy 13 Syndrome Trisomy 18 Syndrome Tubal Pregnancy Tuberculosis Tuberculous Meningitis Tuberous Sclerosis Tuberous Sclerosis 1 Tuberous Sclerosis Complex Tularemia Turner Syndrome Twin-to-Twin Transfusion Syndrome Type 1 Diabetes Type 2 Diabetes Type 2 Diabetes in Children Typhoid Fever

U

Ulcerative Colitis Umbilical Hernia in Children Unconjugated Benign Bilirubinemia Underactive Thyroid Undescended Testicle Unstable Angina Unstable Kneecap Urea Cycle Disorders Urethral Cancer Urinary Incontinence in Men Urinary Incontinence in Women Urinary Tract Infections Urticaria Uterine Cancer Uterine Fibroids Uveitis

V

Vaginal Cancer Vaginal Yeast Infections Vaginitis Valgus Calcaneus Van Buren's Disease Van Lohuizen Syndrome Vancomycin-Resistant Enterococci Varicella Embryopathy Varicose Veins Variola Virus Varioliform Gastritis Vascular Dementia Vascular Malformations of the Brain Vasculitis Venous Skin Ulcer Ventricular Septal Defect Ventricular Tachycardia Verruca Vertigo Viral Gastroenteritis Viral Meningitis Vitamin B12 Deficiency Anemia Vitamin-D Deficiency Rickets Vitiligo Von Recklinghausen's Neurofibromatosis Von Willebrand's Disease Vulvar Cancer

W

Waldenstrom's Macroglobulinemia Warts Wells' Syndrome Wernicke Encephalopathy Wernicke-Korsakoff Syndrome West Nile Encephalitis West Nile Fever West Nile Virus West Syndrome Wet Age-Related Macular Degeneration Whiplash Whipple's Disease Williams Syndrome Williams-Beuren Syndrome Wilms' Tumor Wolf-Hirschhorn Syndrome Wolff-Parkinson-White Syndrome

X

X-linked Bulbospinal Muscular Atrophy X-linked Intellectual Disability X-linked Juvenile Retinoschisis XXY Syndrome Xeroderma Pigmentosum

Y

Yeast Infections Yellow Fever

Z

Zambusch's Disease Zika Zollinger-Ellison Syndrome