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 o

  • 6

    Ovarian cancer stage III

    Stage 3 ovarian cancer has spread beyond the pelvis into the abdominal cavity or to nearby lymph nodes. While this is an advanced form of the disease, treatment combining surgery and chemotherapy can be effective, and many people continue to live full lives after diagnosis.

  • 6

    Ovarian cancer stage IV

    Stage 4 ovarian cancer is the most advanced form of the disease, where cancer cells have spread beyond the ovaries and abdomen to distant parts of the body such as the liver, lungs, or other organs. While this is a serious diagnosis, treatment options exist to help control the cancer, extend life, and improve quality of life.

  • 12

    Ovarian epithelial cancer

    Epithelial ovarian cancer is the most common and deadliest form of ovarian cancer, often diagnosed at advanced stages when it has already spread beyond the ovaries. This disease can be difficult to detect early because symptoms are often subtle or mistaken for less serious conditions, making awareness and regular medical checkups essential.

  • 1

    Ovarian epithelial cancer metastatic

    When ovarian cancer spreads beyond the ovaries to distant parts of the body, it becomes metastatic ovarian cancer, classified as Stage IV. This advanced form of the disease represents a significant challenge, yet understanding treatment options and available therapies provides hope for patients and their families.

  • 2

    Ovarian epithelial cancer recurrent

    When ovarian epithelial cancer returns after treatment, it presents new challenges but also new treatment options. Understanding recurrence patterns, symptoms, and available therapies can help patients and their families navigate this difficult journey with greater confidence.

  • 0

    Ovarian epithelial cancer stage III

    Stage 3 ovarian epithelial cancer has spread beyond the pelvis into the abdomen or nearby lymph nodes, but with modern treatment approaches combining surgery and chemotherapy, many patients can achieve long-term survival.

  • 1

    Ovarian epithelial cancer stage IV

    Stage IV ovarian epithelial cancer is the most advanced form of this disease, where cancer has spread beyond the ovaries to distant parts of the body such as the liver or lungs. While this diagnosis is serious, treatment combining surgery and chemotherapy can help control the disease and improve quality of life.

  • 1

    Ovarian germ cell cancer stage IV

    Stage IV ovarian germ cell cancer is the most advanced form of this rare cancer, where the disease has spread from the ovaries to distant organs like the liver or lungs. Though this represents a serious diagnosis, treatment options including surgery and chemotherapy can help manage the disease and improve outcomes.

  • 0

    Ovarian granulosa cell tumour

    Ovarian granulosa cell tumours are rare hormone-producing tumours that account for about 5% of all ovarian cancers. Most are diagnosed early and grow slowly, often causing symptoms related to high estrogen levels such as irregular bleeding or early puberty in young girls.

  • 0

    Ovarian low malignant potential tumour

    Ovarian low malignant potential tumours are abnormal growths that develop in the ovaries. Unlike typical cancers, these tumours have unusual cells that may become cancer but usually do not, and they often affect younger women with an excellent chance of recovery.

  • 40

    Overweight

    Overweight affects billions of people worldwide, and understanding this condition is the first step toward making positive changes for your health and well-being.

  • 1

    Oxygen saturation

    Oxygen saturation measures how much of the oxygen-carrying protein in your blood is actually loaded with oxygen. It’s a vital indicator of how well your body is getting the oxygen it needs to function properly, and monitoring it has become a standard part of medical care.

  • 1

    Oxygen therapy

    Oxygen therapy provides extra oxygen to people whose bodies cannot get enough on their own. This treatment helps prevent serious complications from low oxygen levels and can greatly improve quality of life for those with breathing difficulties.