| Abbreviation | Definition |
|---|---|
| HPSV | Hydro Pericardium Syndrome Virus |
| HRFS | Hereditary Recurrent Fever Syndromes |
| HRHS | Hypoplastic Right Heart Syndrome |
| HRS | Haw River Syndrome |
| HSES | Hemorrhagic Shock and Encephalopathy Syndrome |
| HSOS | Hepatic sinusoidal obstruction syndrome |
| HTDS | Holo Transference Dementia Syndrome |
| HTEH | Hypertriglyceridemic Essential Hypertensive Patients |
| HUS | haemolytic uraemic syndrome |
| HUS | Haemolytic Uremic Syndrome |
| HUSH | Haemolytic Uraemic Syndrome Help |
| HVCS | Hepatic Vena Cava Syndrome |
| HVS | Horny Virgin Syndrome |
| HWS | Hay Wells Syndrome |
| HWWS | Herlyn Werner Wunderlich syndrome |
| IAHS | Infection Associated Hemophagocytic Syndrome |
| IBS | Interrupted Bowel Syndrome |
| IBS | Irritable Bowl Syndrome |
| IBS | Itchy Butt Syndrome |
| ICNSD | International Conference on Neurological Syndromes and Disorders |