Parsonage???Turner syndrome (PTS; neuralgic amyotrophy) is a generally unilateral
neuritis with sudden onset, severe shoulder or upper arm pain. Although the intense
pain is usually self-limiting, two-thirds of patients experience pro-gressive motor
weakness, narrowed range of motion, reflex changes, dysesthesias and chronic neuropathic
pain in the shoulder girdle musculature and proximal upper limb muscles. The aetiology
is unclear, in addition to some idiopath-ic cases the most common triggers of PTS
are surgery, trauma, infection or vaccination. It is reported after SARS-CoV-2 infection,
and unilateral PTS has been described in some cases following different types of COVID???19
vac-cines. We are currently presenting the case of a middle-aged woman who developed
partial neuralgic amyotrophy on the right shoulder one month after receiving the second
dose of the BNT162b2 COVID???19 mRNA vaccine (Pfizer??? BioNTech), and seven months
later the symptoms appeared in the contralateral upper limb. The diagnosis of PTS
was also confirmed by magnetic resonance and electrodiagnostic examination. The PTS
is not an uncommon condi-tion, but in the absence of knowledge it is rarely thought
of. The purpose of this report is to draw attention to the possibility of PTS in shoulder
or upper arm pain following both SARS-CoV-2 infection and COVID???19 vaccination,
as early diagnosis and adequate therapy may help to shorten the course of the disease.
