Figure 7: Typical ‘cloud-like’ appearance of the gland in the ultrasound scans of a 22-month-old girl (a) and an 8-year-old girl (b) with recurrent swelling of the right and left parotid glands, respectively (GLP: parotid gland; VRM: retromandibular vein; UK: lower jaw, MD: digastric muscle, posterior belly).