2026 data ClinicalTrials.gov official source

Conditions: R

Compiled by PlainTrial, Clinical Trial Intelligence Editorial Process · January 1, 2026

Every condition beginning with R that has a registered US clinical trial, with how many studies cover each.

1,694 conditions starting with "R"

Showing 901–950 of 1,694

Condition	Trials	Recruiting
Refractory Myeloproliferative Neoplasm	1	1
Refractory Neoplasm	1	-
Refractory Nervous System Lymphoma	1	-
Refractory Neuroblastoma	10	7
Refractory Neurofibromatosis Type 1	1	-
Refractory Nodular Lymphocyte Predominant B-Cell Lymphoma	1	1
Refractory Non-Hodgkin Lymphoma	18	12
Refractory Non-Small Cell Lung Cancer	1	1
Refractory or Recurrent Solid Tumors, Excluding CNS Tumors	1	-
Refractory or Unexplained Chronic Cough	1	1
Refractory Osteosarcoma	8	4
Refractory Ovarian Carcinoma	3	2
Refractory Pancreatic Adenocarcinoma	1	1
Refractory Pancreatic Carcinoma	3	1
Refractory Peripheral T-Cell Lymphoma, Not Otherwise Specified	2	-
Refractory Plasma Cell Myeloma	26	4
Refractory Polymorphic Post-Transplant Lymphoproliferative Disorder	2	1
Refractory Primary Amyloidosis	1	-
Refractory Primary Central Nervous System Lymphoma	3	2
Refractory Primary Central Nervous System Neoplasm	3	-
Refractory Primary Cutaneous T-Cell Non-Hodgkin Lymphoma	1	1
Refractory Primary Malignant Central Nervous System Neoplasm	2	1
Refractory Primary Mediastinal (Thymic) Large B-Cell Cell Lymphoma	1	-
Refractory Primary Mediastinal (Thymic) Large B-Cell Lymphoma	2	1
Refractory Primary Mediastinal Large B-Cell Lymphoma	1	-
Refractory Primary Peritoneal Carcinoma	2	1
Refractory Primary Vitreoretinal DLBCL	1	-
Refractory Prostate Carcinoma	1	-
Refractory Rare Malignant Solid Neoplasm	1	-
Refractory Renal Pelvis and Ureter Urothelial Carcinoma	1	1
Refractory Respiratory Failure	1	-
Refractory Rhabdomyosarcoma	1	1
Refractory Rheumatoid Arthritis (RA)	1	1
Refractory Sarcoma	1	1
Refractory Schizophrenia	1	1
Refractory Secondary Acute Myeloid Leukemia	1	1
Refractory Seizures	1	-
Refractory Severe Aplastic Anemia	1	1
Refractory Sezary Syndrome	1	1
Refractory Small Cell Lung Carcinoma	1	-
Refractory Small Lymphocytic Lymphoma	9	5
Refractory Solid Tumor	2	2
Refractory Solid Tumors	8	3
Refractory Status Epilepticus	1	1
Refractory Systemic Lupus Erythematosus	1	-
Refractory T Acute Lymphoblastic Leukemia	3	1
Refractory T Lymphoblastic Lymphoma	2	1
Refractory T-Cell Non-Hodgkin Lymphoma	2	-
Refractory Thyroid Cancer	1	1
Refractory Thyroid Gland Carcinoma	4	-

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Data sourced from official public datasets. See our methodology for details.

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