Baldness Babesiosis (babesiasis) Burns Backpacks Bacteremia Bacteria Bacterial endocarditis Bed-wetting Bike safety Bilirubin Binge eating disorder Bioterrorism and children Bipolar disorder Birth defect Birthmarks Black eye Blepharitis Blister Blood transfusions Boil Borderline intellectual functioning Borderline personality disorder Botulism Botulism, infant Bovine spongiform encephalopathy Bowed legs Broken bones Bronchiolitis Bronchitis Bulimia Bullying Bariatric Surgery Biology of the Immune System Behavioral, Social, and Intellectual Development Birth Injury Bronchopulmonary Dysplasia (BPD) Birth Defects Bone and Muscle Defects Brain and Spinal Cord Defects Bowel Problems Bed-Wetting Breath-Holding Spells Behavioral Problems Bacteremia (Occult) Bronchiolitis Bone Disorders Back Pain Baby breathing difficulties Back pain Biliary Atresia Binswanger's disease Bird flu Body Dysmorphic Disorder Boxing and Brain Brain haemorrhage in pre-term babies Brain tumours Burns and scalds Babesiosis Balantidiasis Baller Gerold Syndrome Balo Disease Bannayan Riley Ruvalcaba Syndrome Banti's Syndrome Barakat Syndrome Bardet Biedl Syndrome Barrett Esophagus Barth Syndrome Bartonellosis Bartter's Syndrome Batten Disease Beals Syndrome Beckwith Wiedemann Syndrome Behcet's Syndrome Bejel Bell's Palsy Benign Essential Tremor Bernard Soulier Syndrome Berylliosis Best Vitelliform Macular Dystrophy Biliary Atresia, Extrahepatic Binswanger's Disease Biotinidase deficiency Birt-Hogg-Dube Syndrome Bjornstad Syndrome Bladder Exstrophy-Epispadias-Cloacal Exstrophy Complex Blastomycosis Blepharophimosis, Ptosis, Epicanthus Inversus Syndrome Blepharospasm, Benign Essential Bloom Syndrome Blue Diaper Syndrome Blue Rubber Bleb Nevus Syndrome Borjeson-Forssman-Lehman Syndrome Botulism Bowen's Disease Bowen Hutterite Syndrome Bowenoid Papulosis Brachial Plexus Palsy Brain Tumors, General Branchio Oculo Facial Syndrome Branchio Oto Renal Syndrome Bronchiolitis Obliterans Organizing Pneumonia Bronchopulmonary Dysplasia (BPD) Brown Sequard Syndrome Brown Syndrome Brucellosis Brugada Syndrome Bubonic Plague Budd Chiari Syndrome Buerger's Disease Bulimia Bullous Pemphigoid Burning Mouth Syndrome