2026 data ClinicalTrials.gov official source

Conditions: R

Compiled by PlainTrial Editorial, Clinical Trial Intelligence Editorial Team · 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 51–100 of 1,694

Condition	Trials	Recruiting
Radiculopathy, Cervical	1	1
Radiculopathy, Lumbosacral Region	1	1
Radiocontrast Nephropathy	1	-
Radiofrequency Ablation	2	2
Radiographic Axial Spondyloarthritis	1	1
Radiological Outcomes	1	-
Radiologically Isolated Syndrome	2	1
Radiology	1	-
Radiology Information Systems	1	-
Radiosurgery	1	1
Radiotherapy	5	2
Radiotracer	2	2
Radius Fractures	2	-
Radius; Fracture, Lower or Distal End	1	-
RAF Gene Mutation	1	1
RAF Mutation	1	1
RAI-Refractory Thyroid Cancer	1	1
RAI1 Gene 17P11.2 Deletion+Duplication	1	1
Randomized Clinical Trial	1	-
Randomized Controlled Trial	2	-
Randomized Controlled Trials	1	-
Randomized Implementation	1	1
Ranitidine Adverse Reaction	1	-
Rape Sexual Assault	1	-
Rapid Eye Movement Sleep Behavior Disorder	1	-
Rapid HIV Screening	1	-
Rapid Response Related to Arrhythmia	1	-
Rapid Sequence Intubation	1	-
Rapid-Onset Obesity with Hypothalamic Dysfunction, Hypoventilation & Autonomic Dysregulation	1	1
Rapidly Accelerated Fibrosarcoma (RAF) Altered Glioma	1	1
Rapidly Escalating Migraine	1	-
Rare Bleeding Disorder	1	1
Rare Cancer	1	-
Rare Cancers	2	2
Rare CNS Tumor	1	1
Rare CNS Tumor Recurrent	1	1
Rare Diseases	8	7
Rare Disorder	1	1
Rare Disorders	3	3
Rare Histiocytic Disorders (RHDs)	1	1
Rare Kidney Stone Diseases	1	1
Rare Malignant Solid Neoplasm	1	-
Rare Neurodevelopmental Conditions	1	1
Rare Neurogenetic Conditions	1	1
Rare Non-Neoplastic Disorder	1	-
Rare Unresectable or Metastatic BRAF V600E Mutation-positive Solid Tumors	1	1
Ras (KRAS or NRAS) Gene Mutation	1	1
RAS Family Gene Mutation	1	-
RAS G12D-mutated NSCLC	1	1
RAS Mutation	5	5

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