Rosai-Dorfman disease with lung involvement in a 10-year-old patient: A case report

Figure 3 Ultrasonography. A: Color Doppler ultrasonography of cervical lymph nodes showed multiple hypoechoic masses in the left neck, with unclear boundaries, irregular shape, and uneven internal echoes. CDFI showed abundant strip blood flow signals; B-D: Abdominal ultrasound showed that there were several hypoechoic masses in the spleen, the boundary was clear, the shape was irregular, the internal echo was uneven, and several separated echoes could be seen.