A Rare Case of Juvenile Idiopathic Arthritis following a Ruptured Baker's Cyst in a Toddler.

A Baker's cyst is usually an incidental finding in adults being investigated for a joint arthropathy, and its rupture preceding the diagnosis of juvenile idiopathic arthritis (JIA) is rare in children. Here, we describe a case of a 4-year-old girl who presented to the Emergency Department with right calf pain, swelling, and no preceding history of trauma. MRI confirmed a ruptured Baker's cyst with inflammatory arthropathy alongside an extensive synovial proliferation throughout the knee joint with large joint effusions and associated soft tissue oedema tracking superiorly and inferiorly along the medial head of gastrocnemius and anteriorly along the tibia.

Does norovirus induce acute hepatitis?

Background: Norovirus is the commonest cause of acute viral gastroenteritis with significant morbidity. Extra intestinal manifestation following norovirus infection is rare and the mechanism is unknown.

Methods: We undertook a review of the English literature published from January 1967 to April 2019 to evaluate the risk of acute viral hepatitis due to norovirus gastroenteritis.