| CNS | Congress of Neurological Surgeons (www.neurosurgeon.org) | In English | → Organizations and associations → Neurology → Surgery, orthopaedics, ophthalmology |
| CNS | Cognitive Neuroscience Society (www.cogneurosociety.org) | In English | → Organizations and associations → Artificial intelligence → Psychology → Neurology |
| CNV | Choroidal Neovascularisation | In English | → Ophtalmology |
| CNV | Choroidal Neovascularization | In English | → Ophtalmology |
| COPD | Chronic Obstructive Pulmonary Disease | In English | → Chest diseases |
| CP | Chronische Polyarthritis | In German | → 6167 |
| CPB | Cardiopulmonary bypass | In English | → Blood and circulatory system → Cardiology |
| CPCSS | Chiang mai Psychiatric Care-giving Skill Scale | In English | → Psychiatry |
| CPCSS | Carolina Prostate Cancer Screening Study | In English | → Oncology |
| CRAT | Centre de Référence sur les Agents Tératogènes | In French | → Pharmacology, toxicology → Oncology |
| CRCIL | Centre de Recherche Cardiovasculaire INSERM-Lariboisière | In French | → Research institutes → Blood and circulatory system → Cardiology |
| CRT | Cardiac Resynchronization Therapy | In English | → Cardiology |
| CRTH | Centre Régional de Traitement de l'Hémophilie | In French | |
| CSIPMH | Center for the Study of Issues in Public Mental Health | In English | → Psychology → Psychiatry |
| CTG | Cardiotocographe | In French | → Diagnostics → Cardiology |
| DA | Douleur Abdominale | In French | |
| DAHW | Deutsche Lepra- und Tuberkulosehilfe | In German | → Organizations and associations |
| DAVF | Dural arteriovenous fistulae = FAVD | Fistule Durale Artérioveineuse Intracrânienne | In French |
In English | → Neurology |
| DCTB | Dansk Center for Translationel Brystkræftforskning | In Danish | → Oncology |
| DDD | Dense Deposit Disease | In English | → Physiology |
| DDG | Deutsche Diabetes Gesellschaft | In German | → Organizations and associations → Physiology |
| DE | Deutsche Epilepsievereinigung (www.epilepsie.sh) | In German | → Organizations and associations → Neurology |
| DGHO | Deutsche Gesellschaft für Hämato-Onkologie | In German | → Organizations and associations → Oncology |
| DGK | Deutsche Gesellschaft für Kardiologie | In German | → Organizations and associations → Cardiology |
| DGKJP | Deutsche Gesellschaft für Kinder- und Jugendpsychiatrie | In German | → Organizations and associations → Child psychology → Psychiatry |
| DGPPN | Deutsche Gesellschaft für Psychiatrie, Psychotherapie und Nervenheilkunde | In German | → Organizations and associations → Psychology → Neurology → Neurology |
| DGSMT | Deutsche Gesellschaft für Sexualmedizin und Sexualtherapie | In German | → Organizations and associations → Urology → Gynaecology → Psychology |
| DGU | Deutsche Gesellschaft für Urologie | In German | → Organizations and associations → Urology |
| DHF | Dengue Hemorrhagic Fever | In English | → Infectious diseases |
| DIAID | Division of Immunology, Allergy & Infectious Diseases | In English | → Immunology and allergy → Infectious diseases |
| DIAMSS | Division des Infections Acquises en Milieu de Soins de Santé | In French | → Infectious diseases |
| DIC | Disseminated Intravascular Coagulation | In English | → Blood and circulatory system |
| DID | Diabète insulino-dépendant = IDDM | Insulin-Dependent Diabetes Mellitus | In English = DMID | Diabetes mellitus insulino-dependente | In Portuguese = DMID | Diabetes mellitus insulino-dependiente | In Spanish |
In French | → Physiology |
| DIP | Déficit Immunitaire Primitif | In French | → 621017 |
| DKFZ | Deutsches Krebsforschungsinstitut | In German | → Research institutes → Oncology |
| DKFZ | Deutsches Krebsforschungszentrum (www.dkfz.de) | In German | → Oncology |
| DKUHD | Division of Kidney, Urologic, and Hematologic Diseases | In English | → Physiology → Blood and circulatory system |
| DLB | Dementia with Lewy Bodies | In English | → Neurology |
| DM | Diabetes mellitus | In many languages | → Physiology |
| DMID | Diabetes mellitus insulino-dependiente = DID, IDDM (look above) |
In Spanish | → Physiology |
| DMID | Diabetes mellitus insulino-dependente = DID, IDDM (look above) |
In Portuguese | → Physiology |
| DPNP | Diabetische Polyneuropathie | In German | → Endocrinology → Neurology |
| DSS | Dengue Shock Syndrom | In English | → Infectious diseases |
| DTH | Delayed-Type Hypersensitivity | In English | → Ophtalmology |
| DVT | Deep Vein Thrombosis | In English | → Blood and circulatory system |
| DVT | Deutscher Fachverband für Verhaltenstherapie | In German | → Organizations and associations → Psychology → Neurology |
| EACH | European Alzheimer Clearing House | In English | → Neurology |
| EADO | European Association of Dermato-Oncology | In English | → Associations → Dermatology → Oncology |
| EAU | European Assocation of Urology | In French | → Organizations and associations → Urology |
| EAU | European Association of Urology | In English | → Associations → Urology |
| ECG | Electrocardiogram | In English | → Diagnostics |
| ECG | Electrocardiograph(y) | In English | → Diagnostics |
| ECNP | European College of Neuropsychopharmacology | In English | → Pharmacology, toxicology → Neurology |
| EDM | Efficience et Déficience Motrices | In French | |
| EDMA | European Diagnostic Manufacturers Association | In English | → Associations → Diagnostics |
| EDÖ | Epilepsie Dachverband Österreich (www.epilepsie.at) | In German | → Organizations and associations → Neurology |
| EEEE | Ελληνική Εθνική Ένωση κατά της Επιληψίας (www.epilepsy-greece.com) | In Greek | → Associations → Neurology |
| EEG | Electroencephalography | In English | → Neurology |
| EEG | Elektro-Enzephalogramm/Elektro-Enzephalographie | In German | → Neurology |
| EFR | European Federation for Colorectal Cancer | In English | → Organizations and associations → 6163 → Oncology |
| EGL | External Genital Lesion | In English | |
| EIM | Espace Intima Média = IMT | Intima Media Thickness | In English |
In French | → Blood and circulatory system → Cardiology |
| ELF | European Lung Foundation | In English | → Foundations → Chest diseases |
| EMG | Elektromyogramm | In German | → Cardiology |
| EMG | Electromyograph | In English | → Diagnostics → Cardiology |
| EMG | Electromyogram | In English | → Diagnostics → Cardiology |
| EMG | Electromyography | In English | → Diagnostics → Cardiology |
| EMN | European Myeloma Network | In English | → Organizations and associations → Oncology |
| ENG | Electronystagnogram | In English | → Diagnostics |
| EOG | Electroculogram | In English | → Diagnostics |
| ÉOLE | Expression, Ouverture, Libération des Épileptiques | In French | → Organizations and associations → Neurology |
| EONS | European Oncology Nursing Society | In English | → Organizations and associations → Oncology |
| EORTC | European Organisation for Research and Treatment of Cancer | In English | → Organizations and associations → Oncology |
| EPNS | European Paediatric Neurology Society (www.epns.info) | In English | → Organizations and associations → Neurology → Pediatry |
| ERS | European Respiratory Society | In English | → Organizations and associations |
| ESDA | European Sexual Dysfunction Alliance | In English | → Organizations and associations → Sexual problems → Urology → Applied sciences, technology |
| ESRD | End Stage Renal Disease | In English | |
| ESSM | European Society of Sexual Medicine | In English | → Organizations and associations → Urology → Gynaecology → Psychology |
| ESST | Encéphalopathie Subaiguë Spongiforme Transmissible | In French | |
| ESST | Encéphalopathie Spongiforme Subaiguë Transmissible | In French | → Veterinary medicine |
| EST | Encéphalopathie Spongioforme Transmissible | In French | → Infectious diseases |
| ESU | European School of Urology | In English | → Specialized or (poly)technical colleges → Urology |
| ET | Esclerosis Tuberosa = TS | Tuberous Sclerosis | In English = TS | Tuberøs Sklerose | In Norwegian |
In Spanish | → Neurology |
| FABIR | Fédération des Associations Belges d'Insuffisants Rénaux | In French | → Associations → Urology |
| FAST | Fukuoka Atherosclerosis Trial | In English | → Blood and circulatory system |
| FAVD | Fistule Durale Artérioveineuse Intracrânienne = DAVF (look above) |
In French | → Neurology |
| FCMTE | Familial Cortical Myoclonic Tremor with Epilepsy | In English | |
| FCRI | Fondation Canadienne pour la Recherche sur l'Incontinence | In French | → Foundations → Urology |
| FECS | Federation of European Cancer Societies | In English | → Organizations and associations → Oncology |
| FENS | Federation of European Neuroscience Societies (http://fens.mdc-berlin.de) | In English | → Organizations and associations → Neurology |
| FFAAIR | Fédération Française des Associations et Amicales d'Insuffisants Respiratoires | In French | → Organizations and associations → Chest diseases |
| FFRE | Fondation Française pour la Recherche sur l'Épilepsie (www.fondation-epilepsie.fr) | In French | → Foundations → Neurology |
| FID | Fédération Internationale du Diabète = IDF | International Diabetes Federation | In English = FID | Federación Internacional de Diabetes | In Spanish |
In French | → Organizations and associations |
| FID | Federación Internacional de Diabetes = IDF (look above) |
In Spanish | → Organizations and associations |
| FIRE | Fundación Instituto de Rehabilitación para Personas con Epilepsia | In Spanish | → Organizations and associations → Neurology |
| FKV | Fachverband Klinische Verhaltenstherapie | In German | → Organizations and associations → Psychology → Neurology |
| FMLSTP | Fonds Mondial de Lutte contre le Sida, la Tuberculose et le Paludisme | In French | → Infectious diseases |
| FMRC | Fonds Mondial de Recherche contre le Cancer (www.fmrc.fr) | In French | → Organizations and associations → Oncology |
| fMRI | Functional Magnetic Resonance Imaging | In English | → Nuclear, atomic, and molecular physics → Diagnostics |
| FNCLCC | Fédération Nationale des Centres de Lutte Contre le Cancer | In French | → Organizations and associations → Oncology |
| FQC | Fondation Québécoise du Cancer | In French | → Foundations → Oncology |
| FSME | Frühsommer-Meningo-Enzephalitis | In German | → Neurology |
| FTD | Frontotemporale Demenz | In German | → Neurology |
| FTD | Frontotemporal Dementia | In English | → Neurology |
| GAN | Giant Axonal Neuropathy | In English | → Neurology |
| GBS | Guillain Barre Syndrome | In English | |
| GELA | Groupe d'Étude des Lymphomes de l'Adulte | In French | → Oncology |
| GEM | Glomérulonéphrite extra-membraneuse | In French | |
| GFEV | Groupe Français d'Étude des Vascularites | In French | → Organizations and associations → Blood and circulatory system |
| GGC | Groupe Génétique et Cancer | In French | → Research institutes → Genetics → Oncology |
| GIB | Giza Immunoeskasiaren Birusa = VIH | Virus de l'Immunodéficience Humaine | In French = HIV | Human Immunodeficiency Virus | In English = VIH | Virus d'Inmunodeficencia Humana | In Asturian = VIH | Vírus da imunodeficiência humana | In Portuguese = VIDH | Virus Immunitarii Defectus Humanae | In Latin = ŽIV | Žmogaus Imunodeficito Virusas | In Lithuanian = ХИВ | Хумане имунодефицијенције | In Serbian = MIV | Menslike Immuniteitsgebreksvirus | In Afrikaans = HIV | Humani Imunodeficientni Virus | In Slovenian = ВИЧ | Вирус иммунодефицита человека | In Russian |
In Basque | → Virology → Immunology and allergy → Infectious diseases |
| GLRA | German Leprosy and Tuberculosis Relief Association | In English | → Associations |
| GN | Glomérulonéphrite | In French | |
| GNA | Glomérulonéphrite aiguë | In French | |
| GNC | Glomérulonéphrite chronique | In French | |
| GNDF | Glial cell-line-Derived Neurotrophic Factor | In English | → Biochemistry, biophysics → Neurology |
| GNPÖ | Gesellschaft für Neuropsychologie Österreich | In German | → Organizations and associations → Psychology → Neurology |
| GNRP | Glomérulonéphrite rapidement progressive | In French | |
| GOLD | Genomics of Lipid-associated Disorders | In English | → Genetics |
| GOLD | Global initiative for Chronic Obstructive Lung Disease | In English | → Chest diseases |
| GSS | (Syndrome de) Gertsman-Straüssler-Scheinker | In French | |
| GSSMT | German Society for Sexual Medicine and Sexual Therapy | In German | → Organizations and associations → Urology → Gynaecology → Psychology |
| H5N1 | Hämagglutinin 5 Neuraminidase 1 | In German | → Enzymes |
| HAART | Highly Active Antiretroviral Therapy | In English | → Pharmacology, toxicology → Infectious diseases |
| HAE | Hereditary Angioedema | In English | |
| HAS | Hipertensão Arterial Sistêmica | In Portuguese | → Physiology |
| HD | Hungtington's Disease | In English | → Neurology |
| HELLP | Hemolysis, Elevated Liver enzymes and Low Platelet count | In English | → Physiology |
| HFA | Hoogfunctionerend Autisme | In Dutch | → Neurology |
| HHV | Human Herpesvirus | In English | → Virology → Infectious diseases |
| HIES | Hartutako Immuno Eskasiaren Sindromea = AIDS | Acquired Immune Deficiency Syndrome | In English = SIDA | Syndrome d'Immuno-Déficience Acquise | In French = VIGS | Verworwe Immuniteitsgebreksindroom | In Afrikaans = SIDA | Síndrome de Inmuno-Deficiencia Adquirida | In Occitan = SIDA | Sindromo di Imuno-Defekteso Aquirita | In Ido = AIDS | Akirita Imuno-Deficita Simptomaro | In Esperanto = SIDA | Sindrome d'inmunodefizienzia aquirita | In Aragonese = СПИН | Синдром на придобитата имунна недостатъчност | In Bulgarian = QİÇS | Qazanılmış İmmun Çatışmazlığı Sindromu | In Azerbaijani = SIDA | Síndrome d'Immunodeficiència Adquirida | In Catalan = SIDA | Síndrome de Inmunodeficiencia Adquirida | In Spanish = SEIF | Siondróm Easpa Imdhíonachta Faighte | In Irish = AIDS | Annlochd Inneamh Dìon-Slàinte | In Scottish Gaelic = ՁԻԱՀ | Ձեռքբերովի Իմունային Անբավարվածության Համախտանիշ | In Armenian = SCDI | Syndromis Comparatis Defectu Immunitatis | In Latin = 에이즈 | 후천성 면역 결핍 증후군 | In Korean = შიდსი | შეძენილი იმუნური დეფიციტის სინდრომი | In Georgian = СИДА | Синдромот на стекнат имунолошки дефицит | In Macedonian = СИДА | синдром стеченог имунолошког дефицита | In Serbian = AIDS | Akvirírani imúnski deficítni sindróm | In Slovenian = СПИД | Синдром приобретённого иммунного дефицита | In Russian = SIDA | Sindromul Imunodeficienţei Autodobândite | In Romanian = UHCW | Unquy hark'aypa chaskisqa waqlliynin | In Quechua = SIDA | Síndrome da imunodeficiência adquirida | In Portuguese = AIDS | Hội chứng Suy giảm Miễn dịch Mắc phải | In Vietnamese = СНІД | Cиндром набутого імунодефіциту | In Ukrainian = AIDS | Alınğan İmmun Defisit Síndromı | In Tatar = UKIMWI | Upungufu wa Kinga Mwilini | In Swahili |
In Basque | → Immunology and allergy → Infectious diseases |
| HIV | Human Immunodeficiency Virus = GIB, VIH, VIDH, ŽIV, ХИВ, MIV, ВИЧ (look above) |
In English | → Virology → Immunology and allergy → Infectious diseases |
| HIV | Humani Imunodeficientni Virus = GIB, VIH, VIDH, ŽIV, ХИВ, MIV, ВИЧ (look above) |
In Slovenian | → Virology → Immunology and allergy → Infectious diseases |
| HKI | Hans Knöll Institut (www.hki-jena.de) | In German | → Research institutes → Pharmacology, toxicology → Infectious diseases |
| HN | Hospital Neurológico | In Spanish | → Neurology |
| HNO | Hals-, Nasen-, und Ohrenheilkunde | In German | |
| HOPE | HIV Outreach Programm and Education | In English | |
| HPS | Hemophagocytic syndrome | In English | → Blood and circulatory system |
| HSMWG | Hungarian Sexual Medicine Working Group | In English | → Organizations and associations → Sexual problems → Urology → Applied sciences, technology |
| HTA | Hypertension artérielle = АГ | Артериальная гипертензия | In Russian |
In French | → Physiology |
| HTN | High Blood Pressure | In English | → Physiology |
| HÜS | Hemolitik üremik sendrom = HUS | Hemolytic Uremic Syndrome | In English = SUH | Síndrome Urémico Hemolítico | In Spanish = SHU | Syndrome Hémolytique et Urémique | In French = HUS | Hämolytisch-urämisches Syndrom | In German = HUS | Hemolytisk uremisk syndrom | In Nynorsk = HUS | Hemolytisk-uremisk syndrom | In Norwegian = ХУС | Хемолитички уремијски синдром | In Serbian |
In Turkish | → Blood and circulatory system |
| HUS | Hemolytisk uremisk syndrom = HÜS, SUH, SHU, ХУС (look above) |
In Nynorsk | → Blood and circulatory system |
| HUS | Hämolytisch-urämisches Syndrom = HÜS, SUH, SHU, ХУС (look above) |
In German | → Blood and circulatory system |
| HUS | Hemolytisk-uremisk syndrom = HÜS, SUH, SHU, ХУС (look above) |
In Norwegian | → Blood and circulatory system |
| HUS | Hemolytic Uremic Syndrome = HÜS, SUH, SHU, ХУС (look above) |
In English | → Blood and circulatory system |
| IARC | International Agency for Research on Cancer | In English | → Organizations and associations → Oncology |
| IAVI | International AIDS Vaccine Initiative | In English | → Immunology and allergy → Infectious diseases |
| IBD | Inflammatory Bowel Disease | In English | → Immunology and allergy |
| IBE | International Bureau for Epilepsy (www.ibe-epilepsy.org) | In English | → Organizations and associations → Neurology |
| IBS | Irritable Bowel Syndrome | In English | |
| ICAD | International Conference on Alzheimer's Disease (and Related Disorders) | In English | → Congresses → Neurology |
| ICALIN | Indicateur composite des activités de lutte contre les infections nosocomiales | In French | → Infectious diseases |
| ICD-O | International Classification of Diseases for Oncology | In English | → Bibliography → Oncology |
| ICORD | International Collaboration on Repair Discoveries | In English | → Organizations and associations → Neurology → Traumatology |
| ICP | Intracranial pressure | In English | → Physiology → Neurology |
| ICPO | Institute of Cytology & Preventive Oncology | In English | → Research institutes → Cytology → Oncology |
| ICV | Institut Cardiovasculaire | In French | → Cardiology |
| IDDM | Insulin-Dependent Diabetes Mellitus = DID, DMID (look above) |
In English | → Physiology |
| IDÉE | Institut Des Épilepsies de l‘Enfant et de l‘Adolescent | In French | → Neurology → Pediatry |
| IDF | International Diabetes Federation (www.idf.org) = FID (look above) |
In English | → Organizations and associations |
| IFA | Imagerie Fonctionnelle Automatisée | In French | → Diagnostics |
| IGR | Institut Gustave-Roussy | In French | → Oncology |
| IJIR | International Journal of Impotence Research | In English | → Sexual problems → Urology |
| IJNS | International Journal of Neural Systems | In English | → Serial publications, periodicals → Biological sciences → Neurology |
| ILAE | International Ligue Against Epilepsy (www.ilae.org) | In English | → Organizations and associations → Neurology |
| ILM | Institut für Laboratoriumsmedizin, Klinische Chemie und Molekulare Diagnostik | In German | → Research institutes → Biochemistry, biophysics → Pharmacology, toxicology → 6160 |
| ILSSM | Israeli Society for Sexual Medicine | In English | → Organizations and associations → Sexual problems → Urology → Applied sciences, technology |
| IMAI | Integrated Management of Adolescent and Adult Illness | In English | |
| IMP | Institute of Molecular Pathology | In English | → Biochemistry, biophysics |
| IMT | Intima Media Thickness = EIM (look above) |
In English | → Blood and circulatory system → Cardiology |
| IN | Istituto di Neuroscienze | In Italian | → Anatomy → Neurology |
| INCA | Institut National du Cancer | In French | → Oncology |
| INJENO | INitiatives de parents de Jeunes Épileptiques du Nord | In French | → Organizations and associations → Neurology |
| IPATIMUP | Instituto de Patologia e Imunologia Molecular da Universidade do Porto | In Portuguese | → Biological sciences |
| IPPS | Internationaler-Prostate-Symptom-Score | In German | |
| IPPS | International Pelvic Pain Society | In English | → Organizations and associations |
| IRCAD | Institut de Recherche contre les Cancers de l'Appareil Digestif | In French | → Oncology |
| IRT | Insuffisance Rénale Terminale | In French | → Physiology |
| ISC | Institut des Sciences Cognitives | In French | → Biological sciences → Neurology |
| ISDP | International Society of Dermatopathology | In English | → Organizations and associations → Dermatology |
| ISIR | International Society for Intelligence Research | In English | → Organizations and associations → Neurology |
| ISPG | International Society of Psychiatric Genetics | In English | → Organizations and associations → Genetics → Psychiatry |
| ISSIR | International Society for Sexual and Impotence Research | In English | → Organizations and associations → Sexual problems → Urology → Applied sciences, technology |
| ISSM | International Society for Sexual Medicine | In English | → Organizations and associations → Urology → Gynaecology → Psychology |
| ISST | Institut für Stimm- und Sprachtherapie | In German | |
| ISSTD | International Society for the Study of Trauma and Dissociation | In English | → Organizations and associations → Neurology |
| IST | Istituto Scientifico Tumori | In Italian | → Research institutes → Oncology |
| ISTH | International Society on Thrombosis and Haemostasis | In English | → Organizations and associations → Cardiology |
| ISUOG | International Society of Ultrasound in Obstetrics and Gynecology (www.isuog.org) | In English | → Organizations and associations → Diagnostics → Gynaecology, obstetrics |
| ITMI | IEEE (Institute of Electrical and Electronics Engineers) Transactions on Medical Imaging | In English | → Serial publications, periodicals → Diagnostics |
| JCoN | Journal of Computational Neuroscience | In English | → Computer science → Serial publications, periodicals → Biological sciences → Neurology |
| JCRB | Japanese Cancer Research Resources Bank | In English | → Oncology |
| JE | Japan-Enzephalitis | In English | → Infectious diseases |
| JIA | Juvenile Idiopathic Arthritis | In English | → 6167 |
| JMHG | Journal of Men's Health & Gender | In English | → Sexual problems → Urology |
| JNE | Journées Nationales de l'Épilepsie | In French | → Neurology |
| JNeur | Journal of Neurochemistry | In English | → Serial publications, periodicals → Biochemistry, biophysics → Neurology |
| JNNP | Journal of Neurology, Neurosurgery, and Psychiatry | In English | → Serial publications, periodicals → Neurology → Psychiatry → Medicine |
| JNO | Journal of Neuro-Oncology | In English | → Serial publications, periodicals → Neurology → Oncology |