Rosai-Dorfman disease also known as sinus histiocytosis with massive lymphadenopathy is a benign, rare systemic disease characterized by a histiocyte proliferation which presents with lymphadenopathy. We report a case of a 4-year-old girl who presented with recurrent cervical lymphadenopathy with tenderness, without any other symptoms. After 1 month of medical treatment, her lymphadenopathy still remained, so we performed complete excision and biopsy. She was diagnosed on cytology as a case of Rosai-Dorfman disease. She responded well to become asymptomatic without recurrence by 1 month.