See Conditions by First Letter (R)
- Rabies
- Radial Neuropathy
- Radiation Induced Brachial Plexopathy
- Radiation Induced Cancer
- Radiation Injuries
- Radiation Pneumonitis
- Radiculopathy
- Radiodermatitis
- Radius Fractures
- Rare Diseases
- Rasmussen Encephalitis
- Raynaud Disease
- Reactive Arthritis
- Reactive Attachment Disorder
- Rectal Diseases
- Rectal Fistula
- Rectal Neoplasms
- Rectal Prolapse
- Rectocele
- Rectovaginal Fistula
- Recurrence
- Recurrent Respiratory Papillomatosis
- Red-Cell Aplasia, Pure
- Refeeding Syndrome
- Reflex Sympathetic Dystrophy
- Reflex, Abnormal
- Refractive Errors
- Refsum Disease
- Refsum Disease, Infantile
- Refsum Disease, Infantile Form
- Regurgitation, Gastric
- Relapsing Fever
- Relapsing Polychondritis
- REM Sleep Behavior Disorder
- Renal Artery Obstruction
- Renal Cancer
- Renal Colic
- Renal Glycosuria
- Renal Insufficiency
- Renal Insufficiency, Chronic
- Renal Osteodystrophy
- Renal Tubular Acidosis
- Renal Tubular Acidosis, Distal, Autosomal Dominant
- Renal Tubular Dysgenesis
- Renal Tubular Transport, Inborn Errors
- Reperfusion Injury
- Respiration Disorders
- Respiratory Aspiration
- Respiratory Distress Syndrome, Adult
- Respiratory Distress Syndrome, Infant
- Respiratory Distress Syndrome, Newborn
- Respiratory Hypersensitivity
- Respiratory Insufficiency
- Respiratory Paralysis
- Respiratory Sounds
- Respiratory Syncytial Virus Infections
- Respiratory System Abnormalities
- Respiratory Tract Diseases
- Respiratory Tract Infections
- Respiratory Tract Neoplasms
- Restless Legs Syndrome
- Restless Legs Syndrome, Susceptibility To, 6
- Reticular Dysgenesis
- Retinal Artery Occlusion
- Retinal Degeneration
- Retinal Detachment
- Retinal Diseases
- Retinal Drusen
- Retinal Dystrophies
- Retinal Hemorrhage
- Retinal Neoplasms
- Retinal Neovascularization
- Retinal Perforations
- Retinal Telangiectasis
- Retinal Vasculitis
- Retinal Vein Occlusion
- Retinitis
- Retinitis Pigmentosa
- Retinitis Pigmentosa-deafness Syndrome
- Retinoblastoma
- Retinopathy of Prematurity
- Retinoschisis
- Retrocochlear Diseases
- Retrognathism
- Retroperitoneal Fibrosis
- Retroperitoneal Neoplasms
- Retroviridae Infections
- Rett Syndrome
- Revesz Syndrome
- Rh Isoimmunization
- Rhabdoid Tumor
- Rhabdomyolysis
- Rhabdomyosarcoma
- Rhabdomyosarcoma Alveolar
- Rhabdomyosarcoma Embryonal
- Rhabdomyosarcoma, Alveolar
- Rhabdomyosarcoma, Embryonal
- Rheumatic Diseases
- Rheumatic Fever
- Rheumatic Heart Disease
- Rhinitis
- Rhinitis, Allergic, Perennial
- Rhinitis, Allergic, Seasonal
- Rhinitis, Atrophic
- Rhinitis, Vasomotor
- Rhinoscleroma
- Rib Fractures
- Richter Syndrome
- Rickets
- Rickettsia Infections
- Rift Valley Fever
- RNA Virus Infections
- Rod Myopathy
- Romano-Ward Syndrome
- Root Resorption
- Rosacea
- Rotavirus Infections
- Rothmund-Thomson Syndrome
- Roussy Levy Syndrome
- Rubella
- Rubinstein-Taybi Syndrome
- Rupture
- Rupture, Spontaneous
- Russell-Silver Syndrome