| Sulfonylurea |
| Serum Osmolality |
| Secobarbital |
| Serum protein immunoelectrophoresis |
| Synovial fluid culture |
| Sweat test |
| Sugar chromatography |
| Sucrose hemolysis test |
| Stool fat |
| Stool Exam (1) |
| Stool Culture |
| Stone analysis |
| Sputum culture |
| Special stain |
| Sodium |
| Sickle prep |
| SHBG |
| SGPT (ALT) |
| SGOT (AST) |
| Semen fructose |
| Semen culture |
| Semen analysis |
| Selenium |
| Scatch test |
| Scabiasis |
| STIMULANTS : |
| Stool Exam (3) |
| Stool Exam (2) |
| Sputum Culture for BK |
| Sputum Direct Smear For BK |
| Sputum Direct smear |
| Synovial F.Cul for BK |
| Synovial F.Direct Smear For BK |
| Synivial F.Direct Smear |
| Stained slide (IHC) |
| Slide |
| Semen Direct smear |
| Specific IgE (Food allergens) |
| Specific IgE (Respiratory allergens) |
| SP.Stane |
| Selenium |
| Specific IgE (Mix allergens) |
| Strongyloides stercoralis Ab |
