Background
Parsonage Turner syndrome (PTS), also known as neuralgic amyotrophy or idiopathic brachial plexopathy, is a rare peripheral multifocal inflammatory neuropathy that usually affects the upper limbs(1). However, it is widely misdiagnosed because of its heterogeneous clinical appearance(2). The classic presentation is a patient with subacute onset of asymmetric shoulder pain, followed several days later by weakness and amyotrophy(3). Although its exact cause is still unknown, multiple factors have been identified such as immunological (infection, vaccination, surgery, pregnancy, physical or mental stress), mechanical (trauma, sports or heavy labor) and genetic factors(4). In the last years PTS has been associated with severe covid-19 infection as well as its vaccination(5). Therefore, we report a rare case of a sub acute onset of PTS as a result of Covid-19 vaccine.