Rosai‐Dorfman disease presenting with solitary liver mass without lymphadenopathy: A case report oleh Yousef Roosta, Ali Esfahani, Amir Vahedi, Kosar Tarvirizadeh, Sadegh Asoubar, Behdad Boroofeh, Roshan Dinparast, Farhad Behzadi, Mortaza Raeisi, Mohammadreza Mohammad Hosseiniazar