- scintimammography
- sclera
- scleroderma
- sclerosing adenosis
- screening
- screening mammogram
- scrotum
- Scutellaria barbata
- SDS
- SDX-102
- Se-methyl-seleno-L-cysteine
- sebum
- second primary cancer
- second-line therapy
- second-look surgery
- secondary cancer
- secondhand smoke
- secrete
- secretin
- secretin human
- secretin stimulation test
- sedative
- sedimentation rate
- sedoxantrone trihydrochloride
- SEER
- SEER registries
- segmental cystectomy
- segmental mastectomy
- segmental resection
- segmentectomy
- seizure
- selection bias
- selective estrogen receptor modulator
- selective serotonin reuptake inhibitor
- selenium
- self-esteem
- sella turcica
- semaxanib
- semen
- seminal fluid
- seminal vesicle
- seminal vesicle biopsy
- seminoma
- semiparasitic
- semustine
- Seneca Valley virus-001
- senega root
- senile keratosis
- sensitivity
- sensor