2026 data ClinicalTrials.gov official source

Conditions: R

Compiled by PlainTrial · January 1, 2026

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

1,691 conditions starting with "R"

Showing 1,451–1,500 of 1,691

Condition	Trials	Recruiting
Retinal Pigment Epithelial Detachment	1	-
Retinal Vascular	1	-
Retinal Vascular Disorder	1	1
Retinal Vasculitis	1	-
Retinal Vein Occlusion	12	3
Retinitis	3	-
Retinitis Pigmentosa	38	15
Retinitis Pigmentosa (RP)	2	2
Retinitis Pigmentosa 11	2	2
Retinitis Pigmentosa 39	1	-
Retinitis Pigmentosa Associated With CNGB1 Mutations	1	1
Retinoblastoma	16	7
Retinoblastoma Bilateral	2	2
Retinoblastoma Unilateral	2	2
Retinoblastoma, Extraocular	1	1
Retinoblastoma, Recurrent	1	1
Retinopathy	2	2
Retinopathy of Prematurity	10	3
Retinopathy of Prematurity (ROP)	4	2
Retinoschisis	2	-
Retrognathism	1	1
Retromolar Trigone Squamous Cell Carcinoma	1	1
Retroperitoneal Fibrosis	1	-
Retroperitoneal Liposarcoma	2	2
Retroperitoneal Sarcoma	7	6
Retropharyngeal Abscess	1	1
Retropubic Hydrodissection	1	1
Retropubic Midurethral Sling	1	1
Retrospective Studies	1	-
Retrospective Study	1	-
Retroviridae Infections	2	1
Rett Syndrome	19	11
Rett Syndrome, Atypical	2	2
Rett Syndrome, Preserved Speech Variant	1	-
Rett's Disorder	1	-
Rett-related Disorders	1	-
Return of Spontaneous Circulation	1	1
Return to Work	1	-
Revascularization	1	1
Reversal of Anticoagulant Treatment	1	-
Reversal of Neuromuscular Blockade	1	-
Reverse Shoulder Replacement	1	1
Reverse Total Shoulder Arthroplasty	4	4
Revesz Syndrome	2	1
Revised Medication Guide Formats	1	-
Revision Breast Augmentation	1	-
Revision Breast Reconstruction	1	-
Revision Hip Arthroplasty	1	1
Revision of Other Devices if Sufficient Bone Stock Remains	1	-
Revision of the Hip Joint	1	-

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