| AIS | Adeno-carcinoma in situ |
|---|---|
| AIS | Adolescent Idiopathic Scoliosis |
| AIS | Androgen Insensitivity Syndrome |
| AIS | acute ischaemic stroke |
| AISA | Acquired Idiopathic Sideroblastic Anemia |
| AIT | Adoptive immunotherapy |
| AIT | Amiodarone induced thyrotoxicosis |
| AITC | Allyl isothiocyanate |
| AITD | Autoimmune Thyroid Disease |
| AITP | Autoimmune thrombocytopenia |