second impact syndrome

English

Alternative forms

• second-impact syndrome

Noun

second impact syndrome (usually uncountable, plural second impact syndromes)

1. A rapid and severe brain swelling caused by a second concussion before the first one has sufficiently healed, resulting in possible death or permanent disability.

   Synonym: (initialism) SIS

   Coordinate terms: chronic traumatic encephalopathy, post-concussion syndrome

Further reading

• second impact syndrome on Wikipedia.Wikipedia