| Title | Type | 
|---|---|
| Abnormal hands | Feature | 
| Acute chest syndrome | Disease | 
| Alagille Syndrome | Rare Condition | 
| Alagille Syndrome | General Medical Guideline | 
| Alport Syndrome | Rare Condition | 
| Alport Syndrome | General Medical Guideline | 
| Anemia in Sickle Cell Disease | Symptom | 
| Anemia in thalassemia | Symptom | 
| Anterior fontanelle closure | Feature | 
| Anterior fontanelle persists | Symptom | 
| Antimongoloid slanting palpebral fissures | Feature | 
| Antimongoloid slanting palpebral fissures | Symptom | 
| Aural Atresia | Disease | 
| Autism | Disease | 
| Autosomaal dominante mentale retardatie-50 | Symptom | 
| Autosomal dominant inheritance | Feature | 
| Autosomal dominant inheritance in TCS | Symptom | 
| Autosomal dominant mental retardation-18 | Rare Condition | 
| Autosomal dominant mental retardation-50 | Rare Condition | 
| Autosomal dominant mental retardation-50 | General Medical Guideline | 
| Autosomal recessive disease | Feature | 
