| RSTS | retropharyngeal soft tissue space |
|---|---|
| SCID | severe combined immunodeficiency [syndrome]; soft copy image display; Structured Clinical Interview ... |
| SCL | scleroderma; serum copper level; sinus cycle length; soft contact lens; stromal cell line; subcostal... |
| SEC | secretin; Singapore epidemic conjunctivitis; soft elastic capsule |
| SEG | segment; soft elastic gelatin; sonoencephalogram |