A Case Study of Lance-Adams Syndrome

Area of Science:

• Neurology
• Neuroscience
• Critical Care Medicine

Background:

• Lance-Adams syndrome (LAS) is a rare form of posthypoxic myoclonus, with fewer than 150 reported cases globally.
• LAS is distinct from acute posthypoxic myoclonus, typically presenting days to weeks after an anoxic event, unlike the immediate onset in acute forms.
• Patients with LAS generally retain neurological function, contrasting with the deep coma and poor prognosis associated with acute posthypoxic myoclonus.

Observation:

• This report details a case of a 64-year-old male who developed Lance-Adams syndrome following cardiac arrest.
• The patient's clinical course was monitored from intensive care unit (ICU) admission through outpatient follow-up.
• Multiple electroencephalograms (EEGs) were utilized to track the progression of his condition.

Findings:

• The case illustrates the characteristic delayed onset of myoclonus in Lance-Adams syndrome after a hypoxic insult.
• Serial EEGs likely showed characteristic changes indicative of Lance-Adams syndrome, aiding in diagnosis and monitoring.
• The patient's neurological function was preserved, consistent with the typical presentation of LAS.

Implications:

• This case contributes to the limited body of literature on Lance-Adams syndrome, aiding in understanding its clinical spectrum.
• Recognizing the distinct features of LAS is crucial for accurate diagnosis and appropriate patient management.
• Further research into the pathophysiology and treatment of LAS may improve outcomes for affected individuals.