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 601–650 of 1,694

Condition	Trials	Recruiting
Recurrent Primary Peritoneal Cancer	1	1
Recurrent Primary Peritoneal Carcinoma	24	8
Recurrent Primary Peritoneal Cavity Cancer	4	-
Recurrent Primary Peritoneal High Grade Serous Adenocarcinoma	1	-
Recurrent Primary Vitreoretinal DLBCL	1	-
Recurrent Prostate Adenocarcinoma	3	2
Recurrent Prostate Cancer	22	7
Recurrent Prostate Cancer After Surgery	1	1
Recurrent Prostate Carcinoma	30	5
Recurrent Pulmonary Embolism (Disorder)	1	-
Recurrent Pulmonary Osteosarcoma	1	-
Recurrent Rectal Adenocarcinoma	1	-
Recurrent Rectal Cancer	9	-
Recurrent Rectal Carcinoma	3	-
Recurrent Rectosigmoid Carcinoma	1	-
Recurrent Renal Cell Cancer	4	-
Recurrent Renal Cell Carcinoma	5	1
Recurrent Renal Pelvis and Ureter Urothelial Carcinoma	1	1
Recurrent Renal Pelvis Urothelial Carcinoma	2	-
Recurrent Respiratory Papillomatosis	7	4
Recurrent Rhabdoid Tumor	1	1
Recurrent Rhabdomyosarcoma	2	1
Recurrent Salivary Gland Cancer	3	-
Recurrent Salivary Gland Carcinoma	6	1
Recurrent Sarcoma	2	1
Recurrent Secondary Acute Myeloid Leukemia	1	1
Recurrent Severe Aplastic Anemia	1	1
Recurrent Sezary Syndrome	1	1
Recurrent Sinonasal Squamous Cell Carcinoma	1	-
Recurrent Skin Acantholytic Squamous Cell Carcinoma	1	1
Recurrent Skin Clear Cell Squamous Cell Carcinoma	1	1
Recurrent Skin Lymphoepithelial Carcinoma	1	1
Recurrent Skin Spindle Cell Squamous Cell Carcinoma	1	1
Recurrent Skin Squamous Cell Carcinoma	3	1
Recurrent Skin Squamous Cell Carcinoma With Sarcomatoid Differentiation	1	1
Recurrent Small Cell Lung Cancer	6	1
Recurrent Small Cell Lung Carcinoma	2	-
Recurrent Small Intestinal Carcinoma	1	-
Recurrent Small Lymphocytic Lymphoma	15	6
Recurrent Solid Tumor	4	3
Recurrent Solid Tumors	2	1
Recurrent Splenic Marginal Zone Lymphoma	1	1
Recurrent Squamous Cell Carcinoma	2	2
Recurrent Squamous Cell Carcinoma of the Head and Neck	1	-
Recurrent Squamous Cell Carcinoma of the Hypopharynx	2	1
Recurrent Squamous Cell Carcinoma of the Larynx	2	1
Recurrent Squamous Cell Carcinoma of the Lip and Oral Cavity	2	1
Recurrent Squamous Cell Carcinoma of the Nasopharynx	1	-
Recurrent Squamous Cell Carcinoma of the Oropharynx	1	-
Recurrent Squamous Cell Carcinoma of the Paranasal Sinus and Nasal Cavity	1	-

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

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