Dropped head syndrome as the sole presenting manifestation of probable post-cytomegalovirus immune-mediated brainstem encephalitis in an immunocompetent woman: a case report
BackgroundDropped head syndrome (DHS) is a rare, disabling chin-on-chest deformity caused by severe cervical extensor weakness. The etiologic spectrum is dominated by peripheral myopathies, motor neuron disease, and myasthenia gravis; central nervous s…