153Reflex Sympathetic Dystrophy Syndrome (RSD) (交感神經失調症)
154Relapsing Polychondritis (RP) (復發性多軟骨炎)
155Retinitis Pigmentosa (RP) (視網膜色素病變)
156Rett Syndrome (RTT) (雷特氏症)
157Rhabdomyosarcoma (RMS) (橫紋肌肉瘤)
158Rubinstein-Tabyi Syndrome (RTS) (Rubinstein-Taybi症候群)
159Russell-Silver Syndrome (RSS) (羅素-西弗氏症)