- Reticulosis (skin)
- Retina, retinal - see condition
- Retinitis (see also Chorioretinitis) 363.20
- Retinoblastoma (M9510/3) 190.5
- Retinochoroiditis (see also Chorioretinitis) 363.20
- Retinopathy (background) 362.10
- Retinoschisis 361.10
- Retractile testis 752.52
- Retraction
- Retrobulbar - see condition
- Retrocaval ureter 753.4
- Retrocecal - see also condition
- Retrocession - see Retroversion
- Retrodisplacement - see Retroversion
- Retroflection, retroflexion - see Retroversion
- Retrognathia, retrognathism (mandibular) (maxillary) 524.10
- Retrograde
- Retroiliac ureter 753.4
- Retroperineal - see condition
- Retroperitoneal - see condition
- Retroperitonitis 567.39
- Retropharyngeal - see condition
