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 257
Breast cancer 130
Neoplasm 124
Plasma cell myeloma 124
Acute myeloid leukaemia 103
Neoplasm malignant 102
Colitis ulcerative 93
Prostate cancer 91
Colorectal cancer metastatic 84
Obesity 84
Colorectal cancer 76
Crohn’s disease 76
Ovarian cancer 76
Dementia Alzheimer’s type 74
Hepatocellular carcinoma 73
Malignant melanoma 69
Breast cancer metastatic 68
Type 2 diabetes mellitus 67
Dermatitis atopic 65
Triple negative breast cancer 62
Chronic lymphocytic leukaemia 62
Squamous cell carcinoma of head and neck 60
HIV infection 58
Rheumatoid arthritis 58
Asthma 57
Non-small cell lung cancer metastatic 57
Osteoarthritis 56
Hormone receptor positive HER2 negative breast cancer 54
Pancreatic carcinoma 51
Renal transplant 51
Chronic kidney disease 50
Multiple sclerosis 48
Ischaemic stroke 46
Parkinson’s disease 46
Chronic obstructive pulmonary disease 46
Systemic lupus erythematosus 46
Hormone-refractory prostate cancer 46
Atrial fibrillation 44
Bladder cancer 42
Gastric cancer 42
Non-small cell lung cancer stage IV 41
Diffuse large B-cell lymphoma 41
Psoriasis 41
Migraine 41
Oesophageal adenocarcinoma 40
Major depression 38
Myelodysplastic syndrome 38
Transitional cell carcinoma 38
Glioblastoma 38
Psoriatic arthropathy 38
Prostate cancer metastatic 37
Endometrial cancer 37
Overweight 36
Cardiac failure 35
Acute lymphocytic leukaemia 35
Cholangiocarcinoma 35
COVID-19 34
Hormone receptor positive breast cancer 34
Systemic scleroderma 34
Hidradenitis 33
HER2 positive breast cancer 33
Type 1 diabetes mellitus 33
Schizophrenia 32
Myasthenia gravis 32
Renal cell carcinoma 32
Head and neck cancer 32
Plasma cell myeloma refractory 32
Coronary artery disease 31
Adenocarcinoma pancreas 31
Rectal cancer 30
Cervix carcinoma 30
Follicular lymphoma 30
Pulmonary arterial hypertension 29
Pancreatic carcinoma metastatic 29
Depression 29
Idiopathic pulmonary fibrosis 28
Oesophageal carcinoma 27
Bladder transitional cell carcinoma 27
Small cell lung cancer extensive stage 27
Metastatic malignant melanoma 26
Interstitial lung disease 26
Non-small cell lung cancer stage III 25
B-cell lymphoma 25
Fallopian tube cancer 25
Pneumonia 25
Lung neoplasm malignant 25
Adenocarcinoma gastric 25
Procedural pain 24
Soft tissue sarcoma 24
Myelofibrosis 24
Small cell lung cancer 24
Amyotrophic lateral sclerosis 24
Endocrine ophthalmopathy 24
Acute myocardial infarction 24
Sjogren’s syndrome 23
B-cell small lymphocytic lymphoma 23
Conjunctivitis allergic 23
Sepsis 23
Colon cancer 23
Breast cancer female 22

Diseases starting with c

  • 3

    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.

  • 3

    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.

  • 1

    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.

  • 1

    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.

  • 19

    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.

  • 12

    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.