Explore popular diseases in clinical trials

Check which popular diseases are currently being frequently studied.

See also our rare diseases glossary and drug database.

Starting by letter

To open the diseases glossary, select a letter from the list below.

Most popular diseases

The list below features the most popular diseases currently involved in ongoing clinical trials.

Disease trials
Non-small cell lung cancer 228
Breast cancer 94
Obesity 86
Prostate cancer 73
Colorectal cancer 69
Ovarian cancer 66
Non-small cell lung cancer metastatic 66
Crohn’s disease 61
Type 2 diabetes mellitus 54
Rheumatoid arthritis 54
Triple negative breast cancer 52
Hormone receptor positive HER2 negative breast cancer 52
Asthma 51
Acute myeloid leukaemia 50
Squamous cell carcinoma of head and neck 50
Chronic kidney disease 49
Neoplasm 48
Colorectal cancer metastatic 47
Hepatocellular carcinoma 47
Systemic lupus erythematosus 40
Colitis ulcerative 40
Multiple sclerosis 39
Overweight 39
Dementia Alzheimer’s type 39
Gastric cancer 38
Myelodysplastic syndrome 37
Parkinson’s disease 37
HER2 positive breast cancer 37
Glioblastoma 37
Atrial fibrillation 34
Bladder cancer 34
Chronic obstructive pulmonary disease 33
Ischaemic stroke 33
Prostate cancer metastatic 33
Myasthenia gravis 32
Renal transplant 31
Type 1 diabetes mellitus 31
Head and neck cancer 31
Endometrial cancer 31
Malignant melanoma 31
Non-small cell lung cancer stage IV 31
Diffuse large B-cell lymphoma 31
Breast cancer metastatic 31
HIV infection 30
Dermatitis atopic 28
Cholangiocarcinoma 28
Coronary artery disease 28
Plasma cell myeloma 28
Pulmonary arterial hypertension 28
Neoplasm malignant 27
Rectal cancer 27
Renal cell carcinoma 26
Pancreatic carcinoma 26
Schizophrenia 26
Duchenne muscular dystrophy 25
Non-small cell lung cancer stage III 25
Follicular lymphoma 25
COVID-19 25
Migraine 24
Hormone receptor positive breast cancer 24
Idiopathic pulmonary fibrosis 24
Non-small cell lung cancer stage IIIB 24
Sepsis 24
Chronic lymphocytic leukaemia 24
Soft tissue sarcoma 24
Mantle cell lymphoma 23
Small cell lung cancer extensive stage 23
Colon cancer 23
Fallopian tube cancer 23
Influenza 22
Small cell lung cancer 21
Interstitial lung disease 21
Acute myocardial infarction 21
Oesophageal adenocarcinoma 21
Amyotrophic lateral sclerosis 21
Chronic rhinosinusitis with nasal polyps 20
Cystic fibrosis 20
Glioma 20
Myelofibrosis 19
Neuroblastoma 19
B-cell lymphoma 19
Sickle cell disease 19
Major depression 19
Procedural pain 19
Axial spondyloarthritis 18
Osteoarthritis 18
Breast cancer female 17
Critical illness 17
Acute kidney injury 17
Hereditary angioedema 17
Relapsing-remitting multiple sclerosis 16
Acute coronary syndrome 16
IgA nephropathy 16
Psoriasis 16
Gastrooesophageal cancer 16
Ewing’s sarcoma 16
Cardiac failure 16
Vitiligo 16
Transitional cell carcinoma 15
Giant cell arteritis 15

Diseases starting with c

  • 1

    Cutaneous T-cell lymphoma recurrent

    When cutaneous T-cell lymphoma returns after treatment, patients face unique challenges that require careful management and support. Understanding what happens when the disease comes back, and what options are available, can help patients and their families navigate this difficult phase of the illness.

  • 2

    Cutaneous T-cell lymphoma refractory

    When cutaneous T-cell lymphoma does not respond to treatment or returns after a period of improvement, patients and their healthcare teams face new challenges in managing this complex skin condition.

  • 0

    Cutaneous T-cell lymphoma stage I

    Stage I cutaneous T-cell lymphoma represents early-stage disease where cancer affects less than 10% of the skin, with no involvement of the blood, lymph nodes, or internal organs, offering patients a favorable outlook with many living normal lives for decades.

  • 0

    Cutaneous T-cell lymphoma stage II

    Cutaneous T-cell lymphoma stage II is a form of blood cancer that primarily affects the skin, with disease that has begun to show changes beyond simple patches or plaques, marking a transition between early and more advanced stages.

  • 1

    Cutibacterium acnes infection

    Cutibacterium acnes is a bacterium that lives on nearly everyone’s skin, but it can transform from a harmless companion into an opportunistic pathogen, causing infections ranging from common acne to serious complications following surgery and medical device implantation.

  • 20

    Cystic fibrosis

    Cystic fibrosis is a genetic condition that causes thick, sticky mucus to build up in the body, affecting the lungs, digestive system, and other organs. While there is no cure yet, advances in treatment have dramatically improved life expectancy, with many people now living into their 50s, 60s, and beyond.

  • 1

    Cystic fibrosis gastrointestinal disease

    Cystic fibrosis affects much more than just the lungs. The thick, sticky mucus caused by a faulty protein creates serious problems throughout the digestive system, particularly in the pancreas and intestines, leading to difficulties with nutrition and growth that require lifelong management.

  • 3

    Cystic fibrosis lung

    Cystic fibrosis is a genetic disease that causes thick, sticky mucus to build up in the lungs and other organs, leading to breathing difficulties and frequent infections that require lifelong management and care.

  • 1

    Cytokine release syndrome

    Cytokine release syndrome is a serious inflammatory response that happens when your immune system releases too many signaling proteins into your bloodstream, causing widespread inflammation that can damage organs and tissues throughout the body.

  • 9

    Cytomegalovirus infection

    Cytomegalovirus is a common virus that stays in the body for life once you’re infected. While most healthy people never know they have it, the virus can cause serious problems for pregnant women, newborns, and those with weakened immune systems.