Clinical Trials Involving Rare Diseases: B
- B Cell Prolymphocytic Leukemia (16)
- B-cell Lymphoma (2,203)
- BAP1 Tumor Predisposition Syndrome (4)
- BK-virus Nephropathy (8)
- BRCA1 Hereditary Breast and Ovarian Cancer Syndrome (1)
- Babesiosis (1)
- Bacterial Meningitis (147)
- Baetz-Greenwalt Syndrome (1)
- Bainbridge-Ropers Syndrome (1)
- Balkan Endemic Nephropathy (2)
- Bannayan-Riley-Ruvalcaba Syndrome (7)
- Bardet-Biedl Syndrome (9)
- Bardet-Biedl Syndrome 1 (9)
- Bardet-Biedl Syndrome 10 (9)
- Bardet-Biedl Syndrome 11 (9)
- Bardet-Biedl Syndrome 12 (9)
- Bardet-Biedl Syndrome 2 (9)
- Bare Lymphocyte Syndrome (3)
- Bare Lymphocyte Syndrome 2 (3)
- Baroreflex Failure (3)
- Barth Syndrome (6)
- Bartter Syndrome (4)
- Basal Cell Carcinoma, Multiple (5)
- Becker Muscular Dystrophy (294)
- Beckwith-Wiedemann Syndrome (8)
- Behavioral Variant of Frontotemporal Dementia (184)
- Behçet Disease (83)
- Bell's Palsy (59)
- Benign Autosomal Dominant Myopathy (5)
- Benign Essential Blepharospasm (43)
- Benign Paroxysmal Positional Vertigo (38)
- Benign Rolandic Epilepsy (BRE) (2)
- Beriberi (23)
- Beryllium Disease (5)
- Best Vitelliform Macular Dystrophy (6)
- Beta-Propeller Protein-Associated Neurodegeneration (1)
- Beta-galactosidase-1 Deficiency (17)
- Beta-thalassemia (225)
- Bethlem Myopathy (5)
- Biemond Syndrome (1)
- Bietti Crystalline Corneoretinal Dystrophy (3)
- Bile Duct Cancer (626)
- Bile Duct Cysts (6)
- Biliary Atresia (40)
- Biliary Atresia Intrahepatic Syndromic Form (1)
- Biliary Tract Cancer (1,201)
- Binswanger's Disease (2)
- Biotinidase Deficiency (4)
- Birdshot Chorioretinopathy (2)
- Birt-Hogg-Dube Syndrome (6)
- Blastic Plasmacytoid Dendritic Cell (30)
- Blastomycosis (7)
- Bloom Syndrome (1)
- Blue Rubber Bleb Nevus Syndrome (3)
- Bohring-Opitz Syndrome (2)
- Botulism (20)
- Bowen's Disease (16)
- Brain Tumor, Adult (287)
- Brain Tumor, Childhood (123)
- Breast Cancer, Male (277)
- Brenner Tumor of Ovary (54)
- Brittle Cornea Syndrome (1)
- Brittle Diabetes (8)
- Broken Heart Syndrome (41)
- Bronchial Adenomas/carcinoids Childhood (1)
- Bronchiolitis Obliterans (99)
- Bronchiolitis Obliterans Organizing Pneumonia (11)
- Bronchopulmonary Dysplasia (245)
- Brown Syndrome (1)
- Brown-Sequard Syndrome (2)
- Brucellosis (42)
- Brugada Syndrome (37)
- Bubonic Plague (3)
- Budd-Chiari Syndrome (4)
- Buerger Disease (13)
- Bullous Pemphigoid (57)
- Burkitt Lymphoma (621)
- Buruli Ulcer (8)