- R-CHOP
- R-CHOP regimen
- R-flurbiprofen
- r-metHuSCF
- r-tPA
- R101933
- R115777
- R1507
- R788 sodium
- rabies
- rachitis
- rAd/p53
- RAD001
- radiation
- radiation brachytherapy
- radiation dermatitis
- radiation enteritis
- radiation fibrosis
- radiation necrosis
- radiation nurse
- radiation oncologist
- radiation physicist
- radiation surgery
- radiation therapist
- radiation therapy
- radical cystectomy
- radical hysterectomy
- radical local excision
- radical lymph node dissection
- radical mastectomy
- radical nephrectomy
- radical perineal prostatectomy
- radical prostatectomy
- radical retropubic prostatectomy
- radical vulvectomy
- radio wave
- radioactive
- radioactive drug
- radioactive fallout
- radioactive iodine
- radioactive palladium
- radioactive seed
- radioembolization
- radiofrequency ablation
- radioimaging
- radioimmunodiagnostics
- radioimmunoguided surgery
- radioimmunotherapeutics
- radioimmunotherapy
- radioisotope