A in Research
- Albers-Schonberg disease
- Albinism
- Albinism deafness syndrome
- Albinism immunodeficiency
- Albinism ocular late onset sensorineural deafness
- Albinism oculocutaneous- Hermansky-Pudlak type
- Albinism- minimal pigment type
- Albrecht Schneider Belmont syndrome
- Albright like syndrome
- Alcohol antenatal infection
- Aldolase A deficiency
- Aldred syndrome
- Aleukemic leukemia cutis
- Alexander disease
- Alkaptonuria
- Allain Babin Demarquez syndrome
- Allan-Herndon-Dudley syndrome
- Allanson Pantzar McLeod syndrome
- Allergic angiitis
- Allergic autoimmune thyroiditis