This is a list of diseases starting with the letter "A".

Aa–Ab Aagenaes syndrome Aarskog–Ose–Pande syndrome Aarskog syndrome Aase–Smith syndrome Aase syndrome Abasia ABCD syndrome Abdallat–Davis–Farrage syndrome Abdominal aortic aneurysm Abdominal chemodectomas with cutaneous angiolipomas Abdominal cystic lymphangioma Abdominal defects Abdominal musculature absent microphthalmia joint laxity Abdominal neoplasm / Abdominal neoplasms Aberrant subclavian artery Ablepharon macrostomia syndrome Abnormal systemic venous return Abruzzo–Erickson syndrome Absence of gluteal muscle Absence of tibia with polydactyly Absent corpus callosum cataract immunodeficiency Absent tibia-polydactyly-arachnoid cyst syndrome Absent T lymphocytes

Ac

Acanthocheilonemiasis Acanthocytosis Acanthocytosis chorea Acanthosis nigricans Acatalasemia Accessory deep peroneal nerve Accessory navicular bone Accessory pancreas

Ach–Ack Achalasia Achalasia-Addisonianism-Alacrimia syndrome Achalasia alacrimia syndrome Achalasia, familial esophageal Achalasia microcephaly Achard syndrome Achard–Thiers syndrome Acheiropodia Achondrogenesis Achondrogenesis Kozlowski type Achondrogenesis type 1A Achondrogenesis type 1B Achondrogenesis type 2 Achondroplasia Achondroplasia Swiss type agammaglobulinemia Achondroplastic dwarfism Achromatopsia Achromatopsia incomplete, X-linked Acid maltase deficiency Acidemia, isovaleric Acidemia, propionic Acitretine antenatal infection Ackerman syndrome

Acn–Acq Acne rosacea Acne vulgaris; often called acne Acoustic neuroma Acoustic schwannomas Acquired agranulocytosis Acquired central hypoventilation syndrome Acquired hypoprothrombinemia Acquired ichthyosis

Acquired prothrombin deficiency Acquired syphilis

Acr

Acra Acral dysostosis dyserythropoiesis Acral renal mandibular syndrome

Acro Acro coxo mesomelic dysplasia

Acroc–Acrok Acrocallosal syndrome, Schinzel type Acrocephalopolydactyly Acrocephalosyndactyly Jackson Weiss type Acrocephaly Acrocephaly pulmonary stenosis mental retardation Acrocyanosis Acrodermatitis Acrodermatitis enteropathica Acrodysostosis Acrodysplasia Acrodysplasia scoliosis Acrofacial dysostosis Acrofacial dysostosis ambiguous genitalia Acrofacial dysostosis atypical postaxial Acrofacial dysostosis Catania form Acrofacial dysostosis, Nager type Acrofacial dysostosis, Palagonia type Acrofacial dysostosis Preis type Acrofacial dysostosis Rodriguez type Acrofacial dysostosis Weyers type Acrofrontofacionasal dysostosis Acrokeratoelastoidosis of Costa

Acrom–Acros Acromegaloid changes cutis verticis gyrata corneal Acromegaloid facial appearance syndrome Acromegaloid hypertrichosis syndrome Acromegaly Acromesomelic dysplasia Acromesomelic dysplasia Brahimi Bacha type Acromesomelic dysplasia Campailla Martinelli type Acromesomelic dysplasia Hunter Thompson type Acromesomelic dysplasia, Maroteaux type Acromicric dysplasia Acroosteolysis dominant type Acroosteolysis neurogenic Acroosteolysis osteoporosis skull and mandible changes Acropectoral syndrome Acropectorenal field defect Acropectorovertebral dysplasia Acrophobia Acropigmentation of Dohi Acrorenal syndrome recessive Acrorenoocular syndrome Acrospiroma

Act ACTH deficiency ACTH resistance Actinic keratosis Actinomycetales causes anal infection Actinomycosis Activated protein C resistance

Acu

Acut

Acuta Acutane embryopathy

Acute

Acute a – Acute l Acute anxiety Acute articular rheumatism Acute erythroblastic leukemia Acute febrile neutrophilic dermatosis Acute gouty arthritis Acute idiopathic polyneuritis Acute intermittent porphyria Acute lymphoblastic leukemia Acute lymphoblastic leukemia congenital sporadic aniridia Acute lymphocytic leukemia

Acute m – Acute p Acute megakaryoblastic leukemia Acute monoblastic leukemia Acute monocytic leukemia Acute mountain sickness Acute myeloblastic leukemia Acute myeloblastic leukemia, minimally differentiated Acute myeloblastic leukemia type 1 Acute myeloblastic leukemia type 2 Acute myeloblastic leukemia type 3 Acute myeloblastic leukemia type 4 Acute myeloblastic leukemia type 5 Acute myeloblastic leukemia type 6 Acute myeloblastic leukemia type 7 Acute myeloblastic leukemia with maturation Acute myeloblastic leukemia without maturation Acute myelocytic leukemia Acute myelogenous leukemia Acute myeloid leukemia Acute myeloid leukemia, secondary Acute myelomonocytic leukemia Acute necrotizing ulcerative gingivitis Acute non lymphoblastic leukemia (generic term) Acute pancreatitis Acute posterior multifocal placoid pigment epitheliopathy Acute promyelocytic leukemia

Acute r – Acute t Acute renal failure Acute respiratory distress syndrome Acute tubular necrosis

Acy Acyl-CoA dehydrogenase, medium chain, deficiency of Acyl-CoA dehydrogenase, short chain, deficiency of Acyl-CoA dehydrogenase, very long chain, deficiency of Acyl-CoA oxidase deficiency

Ad

Ada–Adi Adactylia unilateral dominant ADAM complex Adams–Nance syndrome Adams–Oliver syndrome Addison's disease Adducted thumb club foot syndrome Adducted thumb syndrome recessive form Adducted thumbs Dundar type Adenine phosphoribosyltransferase deficiency Adenocarcinoid tumor Adenocarcinoma of esophagus Adenocarcinoma of lung Adenoid cystic carcinoma Adenoma Adenoma of the adrenal gland Adenomatoid odontogenic tumor Adenomyosis Adenosine deaminase deficiency Adenosine monophosphate deaminase deficiency Adenosine triphosphatase deficiency, anemia due to Adenylosuccinate lyase deficiency Adie syndrome Adiposis dolorosa, Dercum's disease

Ado–Adr Adolescent benign focal crisis Adrenal adenoma, familial Adrenal cancer Adrenal disorder Adrenal gland hyperfunction Adrenal gland hypofunction Adrenal hyperplasia Adrenal hyperplasia, congenital Adrenal hypertension Adrenal hypoplasia Adrenal hypoplasia congenital, X-linked Adrenal incidentaloma Adrenal insufficiency Adrenal macropolyadenomatosis Adrenal medulla neoplasm Adrenocortical carcinoma Adrenogenital syndrome Adrenoleukodystrophy, autosomal, neonatal form Adrenoleukodystrophy, X-linked Adrenomyodystrophy

Adu Adult attention deficit hyperactivity disorder Adult-onset Still's disease Adult syndrome Advanced sleep phase syndrome

Ae–Ah Aerosinusitis Afibrinogenemia African trypanosomiasis Agammaglobulinemia Aganglionosis Aganglionosis, total intestinal Agenesis of the vena cava Aggressive fibromatosis Aging Agnathia Agnathia holoprosencephaly situs inversus Agnosia, primary visual Agoraphobia Agraphia Agyria Agyria pachygyria polymicrogyria Agyria-pachygyria type 1 Ahumada-Del Castillo syndrome

Ai–Ak Aicardi–Goutières syndromes Aicardi syndrome Aichmophobia AIDS AIDS dementia complex AIDS dysmorphic syndrome Ainhum Akaba–Hayasaka syndrome Akesson syndrome Aksu–Stckhausen syndrome

Al

Al Awadi Teebi Farag syndrome Al Frayh Facharzt Haque syndrome Al Gazali Al Talabani syndrome Al Gazali Aziz Salem syndrome Al Gazali Donnai Mueller syndrome Al Gazali Hirschsprung syndrome Al Gazali Khidr Prem Chandran syndrome Al Gazali Sabrinathan Nair syndrome

Ala–Alc Alagille–Watson syndrome (AWS) Alar nasal cartilages coloboma of telecanthus Albers–Schonberg disease Albinism Albinism deafness syndrome Albinism immunodeficiency Albinism, minimal pigment type Albinism, ocular Albinism ocular late onset sensorineural deafness Albinism oculocutaneous, Hermansky–Pudlak type Albinism, yellow mutant type Albinoidism Albrecht–Schneider–Belmont syndrome Albright–Turner–Morgani syndrome Albright's hereditary osteodystrophy Albright's syndrome Alcohol antenatal infection Alcohol dependence Alcohol fetopathy Alcohol withdrawal syndrome Alcoholic hepatitis Alcoholic liver cirrhosis

Ald–All Aldolase A deficiency Aldred syndrome Aleukemic leukemia cutis Alexander disease Alexia (acquired dyslexia) Alien hand syndrome Alkaptonuria Allain–Babin–Demarquez syndrome Allan–Herndon–Dudley syndrome Allanson–Pantzar–McLeod syndrome Allergic angiitis Allergic autoimmune thyroiditis Allergic bronchopulmonary aspergillosis Allergic encephalomyelitis

Alo Aloi Tomasini Isaia syndrome Alopecia Alopecia anosmia deafness hypogonadism syndrome Alopecia areata Alopecia congenita keratosis palmoplantaris Alopecia contractures dwarfism mental retardation Alopecia epilepsy oligophrenia syndrome of Moynahan Alopecia, epilepsy, pyorrhea, mental subnormality Alopecia hypogonadism extrapyramidal disorder Alopecia immunodeficiency Alopecia macular degeneration growth retardation Alopecia mental retardation hypogonadism Alopecia mental retardation syndrome Alopecia totalis Alopecia universalis Alopecia universalis onychodystrophy vitiligo

Alp–Alz Alpers disease Alpha 1-antitrypsin deficiency Alpha-2 deficient collagen disease Alpha-ketoglutarate dehydrogenase deficiency Alpha-L-iduronidase deficiency Alpha-mannosidosis Alpha-sarcoglycanopathy Alpha-thalassemia Alpha thalassemia abnormal morphogenesis Alpha-thalassemia mental retardation syndrome Alport syndrome Alport syndrome, dominant type Alport syndrome macrothrombocytopenia Alport syndrome, recessive type Alstrom's syndrome Alternating hemiplegia Alternating hemiplegia of childhood Aluminium lung Alveolar capillary dysplasia Alveolar echinococcosis Alveolar soft part sarcoma Alveolitis, extrinsic allergic Alves Dos Santos Castello syndrome Alwadei syndrome Alzheimer's disease Alzheimer's disease, early-onset Alzheimer's disease, familial

Am Amaurosis Amaurosis congenita of Leber Amaurosis congenita of Leber, type 1 Amaurosis congenita of Leber, type 2 Amaurosis hypertrichosis Amblyopia Ambral syndrome Ambras syndrome Amebiasis Amegakaryocytic thrombocytopenia Amelia (birth defect) Amelia cleft lip palate hydrocephalus iris coloboma Amelia facial dysmorphism Amelia X linked Amelogenesis Amelogenesis imperfecta Amelogenesis imperfecta hypomaturation type Amelogenesis imperfecta local hypoplastic form Amelogenesis imperfecta nephrocalcinosis Ameloonychohypohidrotic syndrome Amenorrhea American trypanosomiasis Amnesia Amnesia, anterograde Amnesia, childhood Amnesia, dissociative Amnesia, drug-induced Amnesia, lacunar Amnesia, retrograde Amnesia, source Amnesia, transient global Amyotrophic lateral sclerosis

An

Ana–Ane Anaphylaxis Anaplasmosis Anaplastic thyroid cancer Andersen's disease Andre syndrome Androgen insensitivity syndrome (AIS) Anemia Anemia, Diamond–Blackfan Anemia, hypoplastic, congenital Anemia, pernicious Anemia, sideroblastic Anemia sideroblastic spinocerebellar ataxia Anencephaly Anencephaly spina bifida X linked Aneurysm Aneurysm, intracranial berry Aneurysm of sinus of Valsalva

Ang Angel shaped phalangoep Anger irritation syndrome Angiofollicular lymph hyperplasia Angioimmunoblastic lymphadenopathy with dysproteinemia Angiokeratoma mental retardation coarse face Angiolipoma Angioma Angioma hereditary neurocutaneous Angiomatosis Angiomatosis encephalotrigeminal Angiomatosis leptomeningeal capillary - venous Angiomatosis systemic cystic seip syndrome Angiomyomatous hamartoma Angioneurotic edema hereditary due to C1 esterase deficiency Angiosarcoma Angiosarcoma of the liver Angiosarcoma of the scalp Angiostrongyliasis Angiotensin renin aldosterone hypertension Anguillulosis

Ani–Ank Aniridia Aniridia absent patella Aniridia ataxia renal agenesis psychomotor retardation Aniridia cerebellar ataxia mental deficiency Aniridia mental retardation syndrome Aniridia ptosis mental retardation obesity familial Aniridia renal agenesis psychomotor retardation Aniridia, sporadic Aniridia type 2 Anisakiasis Ankle defects short stature Ankyloblepharon ectodermal defects cleft lip palate Ankyloblepharon filiforme adnatum cleft palate