Clinical Trials Involving Rare Diseases: B
- B Cell Prolymphocytic Leukemia (15)
- B-cell Lymphoma (1,987)
- BAP1 Tumor Predisposition Syndrome (2)
- BK-virus Nephropathy (6)
- BRCA1 Hereditary Breast and Ovarian Cancer Syndrome (1)
- Babesiosis (1)
- Bacterial Meningitis (134)
- Baetz-Greenwalt Syndrome (1)
- Bainbridge-Ropers Syndrome (1)
- Balkan Endemic Nephropathy (1)
- Bannayan-Riley-Ruvalcaba Syndrome (1)
- Bardet-Biedl Syndrome (8)
- Bardet-Biedl Syndrome 1 (8)
- Bardet-Biedl Syndrome 10 (8)
- Bardet-Biedl Syndrome 11 (8)
- Bardet-Biedl Syndrome 12 (8)
- Bardet-Biedl Syndrome 2 (8)
- Bare Lymphocyte Syndrome (2)
- Bare Lymphocyte Syndrome 2 (2)
- Baroreflex Failure (3)
- Barth Syndrome (6)
- Bartter Syndrome (4)
- Basal Cell Carcinoma, Multiple (5)
- Becker Muscular Dystrophy (259)
- Beckwith-Wiedemann Syndrome (7)
- Behavioral Variant of Frontotemporal Dementia (151)
- Behçet Disease (69)
- Bell's Palsy (47)
- Benign Autosomal Dominant Myopathy (5)
- Benign Essential Blepharospasm (41)
- Benign Paroxysmal Positional Vertigo (33)
- Benign Rolandic Epilepsy (BRE) (1)
- Beriberi (21)
- Beryllium Disease (5)
- Best Vitelliform Macular Dystrophy (5)
- Beta-Propeller Protein-Associated Neurodegeneration (1)
- Beta-galactosidase-1 Deficiency (11)
- Beta-thalassemia (201)
- Bethlem Myopathy (5)
- Biemond Syndrome (1)
- Bile Duct Cancer (513)
- Bile Duct Cysts (5)
- Biliary Atresia (30)
- Biliary Atresia Intrahepatic Syndromic Form (1)
- Biliary Tract Cancer (222)
- Biotinidase Deficiency (4)
- Birdshot Chorioretinopathy (2)
- Birt-Hogg-Dube Syndrome (6)
- Blastic Plasmacytoid Dendritic Cell (22)
- Blastomycosis (7)
- Bloom Syndrome (1)
- Blue Rubber Bleb Nevus Syndrome (3)
- Bohring-Opitz Syndrome (2)
- Botulism (17)
- Bowen's Disease (14)
- Brain Tumor, Adult (280)
- Brain Tumor, Childhood (116)
- Breast Cancer, Male (278)
- Brenner Tumor of Ovary (54)
- Brittle Cornea Syndrome (1)
- Brittle Diabetes (8)
- Broken Heart Syndrome (31)
- Bronchial Adenomas/carcinoids Childhood (1)
- Bronchiolitis Obliterans (92)
- Bronchiolitis Obliterans Organizing Pneumonia (6)
- Bronchopulmonary Dysplasia (209)
- Brown Syndrome (1)
- Brown-Sequard Syndrome (2)
- Brucellosis (33)
- Brugada Syndrome (28)
- Bubonic Plague (2)
- Budd-Chiari Syndrome (4)
- Buerger Disease (12)
- Bullous Pemphigoid (43)
- Burkitt Lymphoma (727)
- Buruli Ulcer (8)