In this radiology lecture, we review the ultrasound appearance of parotitis in the pediatric population!
Key teaching points include:
Parotitis = Inflammation of the parotid glandsAcute parotitis is usually infectious, most commonly viralMumps is most common viral cause in children, often bilateralBacterial parotitis can cause suppurative parotitis seen in premature infants and immunosuppressed childrenAcute parotitis on US: Enlarged, heterogeneous, hyperemic gland(s) +/- lymphadenopathySince can be bilateral, comparison scanning essentialBacterial parotitis may be complicated by abscess“Pomegranate sign” may be seen in setting of acute parotitis: Uniform anechoic foci scattered throughout the glandJuvenile recurrent parotitis (JRP) = Recurrent inflammatory parotitis in children of unknown etiologyJRP is rare, but second most common cause of parotitis in childhood after mumpsJRP often begins between age 3-6, typically resolves spontaneously after pubertyUsually idiopathic, JRP can be presenting symptom of Sjogren’s syndrome, lymphoma, and underlying immunodeficiencyJRP on US: May be unilateral or bilateral, multiple hypoechoic foci of salivary secretions scattered throughout the gland +/- central calcifications, color Doppler can be normalAdditional causes of parotitis: Sialolithiasis/obstruction, autoimmune (Sjogren syndrome, chronic sclerosing sialadenitis), infectious (HIV, TB), and sarcoidosis (rare in children).To learn more about the Samsung RS85 Prestige ultrasound system, please visit: https://www.bostonimaging.com/rs85-prestige-ultrasound-system-4
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