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Locked-in syndrome (LIS) is a rare neurological disorder, usually appears as a result of the pons cerebellar damage, mostly after the brain stroke. Locked-in syndrome is characterized by the paralysis of skeletal muscles (respiratory, facial, pharyngeal, lingual and muscles of the extremities). Patient is unable to speak and breath, facial expressions and voluntary movements are also impossible. Acromegaly is a disease that can be described by the increase of the growth hormone (GH) and Insulin-like growth factor (IGF-1) and develops in most cases due to the pituitary adenomas. Pituitary adenoma (PA) can be treated by neurosurgical techniques, pharmaceutical and radiation therapy (RT). We present a clinical case of 33-year-old woman with PA-caused acromegaly, that developed muscle weakness, nausea, vomit and respiratory disturbance in a 2 months after the radiation therapy. Subacute comatose state was developed in the patient. MRI of the brain revealed a multi-focal lesion of the media-basal regions on both sides, frontal corpus callosum and brain stem. Differential diagnosis included an acute demyelination (SD, PML), viral encephalitis and vasculitis. Treatment included methylprednisolone pulse therapy and plasmapheresis. The consciousness cleared up, but there was no spontaneous breathing, tetraplegia persisted. Autoimmune and infectious diseases was excluded. The homozygous mutation PAI-1-675 4G/4G was found. In this case, acromegaly induced endothelial dysfunction was the pathogenesis factor of multiple cerebral infarctions and demyelinating lesions, as well as RT and its proven pathological influence on the vascular wall and the fibrinolytic system. The revealed thrombophilia was also a factor of multiple cerebral infarctions. A Potential combination of pathogenic factors in the development of cerebral should be taken into account in predicting complications of RT.

učënye zapiski sankt-peterburgskogo gosudarstvennogo medicinskogo universiteta im. akad. i.p. pavlova/učënye zapiski sankt-peterburgskogo gosudarstvennogo medicinskogo universiteta imeni akademika i. p. pavlova

LOCKED-IN SYNDROME DUE TO MULTIPLE BRAIN STEM INFARCTIONS AND FOCI OF DEMYELINATION AFTER RADIATION THERAPY OF PITUITARY ADENOMA WITH ACROMEGALY