Her Royal Highness Princess Chulabhorn was admitted to Vichaiyut hospital on Thursday for medical treatment, according to an announcement of the Bureau of the Royal Household.
Doctors have discovered a tumor in the neck of the princess which requires surgery for the removal of the tumor for a biopsy.
The announcement also said that the princess suffered from stomach ache and experienced vomiting resulting from inflammation of the pancreas that would require diagnosis and continuous treatment.