Pseudoparalysis of Parrot

Infants with congenital syphilis and periostitis may experience pain and limited movement of the affected limbs. If the periostitis is severe, the infant may entirely avoid moving the affected limb and this condition can be mistaken for paralysis, hence the term "pseudoparalysis". This was originally described by Joseph Marie Jules Parrot in 1871 and the condition is commonly referred to as Pseudoparalysis of Parrot. Typically, the upper limbs are affected, with bilateral involvement. The infant clinically presents with the upper extremities hanging flaccid and extended along the side of the body.