retraction ring - RPET
- Riechert-Mundinger technique
- Riedel
- Riedel disease
- Riedel lobe
- Riedel lobe thyroiditis (disease struma)
- Riedel struma
- Riedel thyroiditis
- Riedel's disease
- Riedel's struma
- Rieder
- Rieder cell
- Rieder cell leukemia
- Rieder cell leukemia lymphocyte (cell)
- Rieder lymphocyte
- Riegel
- Riegel pulse
- Riegel pulse
- Rieger
- Rieger anomaly
- Rieger anomaly syndrome
