Clinical Trials Involving Rare Diseases: B
- B Cell Prolymphocytic Leukemia (17)
- B-cell Lymphoma (2,524)
- BAP1 Tumor Predisposition Syndrome (6)
- BK-virus Nephropathy (9)
- BRCA1 Hereditary Breast and Ovarian Cancer Syndrome (1)
- Babesiosis (2)
- Bacterial Meningitis (155)
- Baetz-Greenwalt Syndrome (1)
- Bainbridge-Ropers Syndrome (1)
- Balkan Endemic Nephropathy (2)
- Bannayan-Riley-Ruvalcaba Syndrome (8)
- Bardet-Biedl Syndrome (14)
- Bardet-Biedl Syndrome 1 (14)
- Bardet-Biedl Syndrome 10 (14)
- Bardet-Biedl Syndrome 11 (14)
- Bardet-Biedl Syndrome 12 (14)
- Bardet-Biedl Syndrome 2 (14)
- Bare Lymphocyte Syndrome (3)
- Bare Lymphocyte Syndrome 2 (3)
- Baroreflex Failure (3)
- Barth Syndrome (8)
- Bartter Syndrome (4)
- Basal Cell Carcinoma, Multiple (6)
- Becker Muscular Dystrophy (363)
- Beckwith-Wiedemann Syndrome (9)
- Behavioral Variant of Frontotemporal Dementia (236)
- Behçet Disease (94)
- Bell's Palsy (81)
- Benign Autosomal Dominant Myopathy (5)
- Benign Essential Blepharospasm (47)
- Benign Paroxysmal Positional Vertigo (51)
- Benign Rolandic Epilepsy (BRE) (2)
- Beriberi (27)
- Beryllium Disease (5)
- Best Vitelliform Macular Dystrophy (7)
- Beta Ketothiolase Deficiency (1)
- Beta-Propeller Protein-Associated Neurodegeneration (2)
- Beta-galactosidase-1 Deficiency (18)
- Beta-thalassemia (260)
- Bethlem Myopathy (5)
- Biemond Syndrome (1)
- Bietti Crystalline Corneoretinal Dystrophy (4)
- Bile Duct Cancer (772)
- Bile Duct Cysts (9)
- Biliary Atresia (50)
- Biliary Atresia Intrahepatic Syndromic Form (1)
- Biliary Tract Cancer (344)
- Binswanger's Disease (2)
- Biotin-thiamine-responsive Basal Ganglia Disease (1)
- Biotinidase Deficiency (5)
- Birdshot Chorioretinopathy (3)
- Birt-Hogg-Dube Syndrome (7)
- Blastic Plasmacytoid Dendritic Cell (33)
- Blastomycosis (8)
- Bloom Syndrome (1)
- Blount Disease (1)
- Blue Rubber Bleb Nevus Syndrome (3)
- Bohring-Opitz Syndrome (2)
- Botulism (20)
- Bowen's Disease (19)
- Brain Dopamine-serotonin Vesicular Transport Disease (1)
- Brain Tumor, Adult (289)
- Brain Tumor, Childhood (132)
- Breast Cancer, Male (279)
- Brenner Tumor of Ovary (54)
- Brittle Cornea Syndrome (1)
- Brittle Diabetes (9)
- Broken Heart Syndrome (43)
- Bronchial Adenomas/carcinoids Childhood (1)
- Bronchiolitis Obliterans (105)
- Bronchiolitis Obliterans Organizing Pneumonia (11)
- Bronchopulmonary Dysplasia (284)
- Brown Syndrome (1)
- Brown-Sequard Syndrome (2)
- Brucellosis (55)
- Brugada Syndrome (46)
- Bubonic Plague (3)
- Budd-Chiari Syndrome (7)
- Buerger Disease (14)
- Bullous Pemphigoid (66)
- Burkitt Lymphoma (631)
- Buruli Ulcer (9)