| TSTA | toxoplasmin skin test antigen; tumor-specific tissue antigen; tumor-specific transplantation antigen... |
|---|---|
| TTD | temporary total disability; tissue tolerance dose; transient tic disorder; transverse thoracic diame... |
| UCTD | undifferentiated (unclassifiable) connective tissue disease |
| uCTD | undifferentiated connective tissue disease |
| SSTI | Skin soft tissue infection |