| UC | ulcerative colitis; ultracentrifugal; umbilical cord; unchanged; unclassifiable; unconscious; undiff... |
|---|---|
| PNET | Primitive Neuro-Ectodermal(-Epithelial) Tumor |
| BET | benign epithelial tumor; bleeding esophageal varix; Brunauer-Emmet-Teller [method] |
| BLEL | benign lympho-epithelial lesion |
| CEC | central echo complex; ciliated epithelial cell; Commission of the European Community |