In a 2-year-old with fever and a brief generalized seizure lasting less than 15 minutes, which diagnosis is most likely?

In a 2-year-old with fever and a brief generalized seizure lasting less than 15 minutes, which diagnosis is most likely?

• A. Absence seizure
• B. Complex partial seizure
• C. Febrile seizure
• D. Simple partial seizure

Answer: (C)

A febrile seizure is the best fit. In young children, especially between about 6 months and 5 years, a fever plus a generalized tonic-clonic seizure that is brief (typically under 15 minutes) is the classic presentation. These seizures are not due to an intracranial infection or a chronic epilepsy syndrome and the child usually returns to baseline afterward. Absence seizures involve very brief lapses of consciousness without generalized convulsions and occur in slightly older kids, not tied to fever. Simple and complex partial seizures are focal—they begin in one region of the brain and show focal features (like unilateral motor activity or sensory changes) and may impair awareness or last longer than 15 minutes; fever is not the defining trigger for these in a toddler. So, the fever plus a short generalized seizure in a 2-year-old aligns best with a febrile seizure, rather than the other seizure types. If the seizure lasts longer than 15 minutes, recurs within 24 hours, or there are signs of meningitis or a toxic-appearing child, additional evaluation is needed.

A febrile seizure is the best fit. In young children, especially between about 6 months and 5 years, a fever plus a generalized tonic-clonic seizure that is brief (typically under 15 minutes) is the classic presentation. These seizures are not due to an intracranial infection or a chronic epilepsy syndrome and the child usually returns to baseline afterward.

Absence seizures involve very brief lapses of consciousness without generalized convulsions and occur in slightly older kids, not tied to fever. Simple and complex partial seizures are focal—they begin in one region of the brain and show focal features (like unilateral motor activity or sensory changes) and may impair awareness or last longer than 15 minutes; fever is not the defining trigger for these in a toddler.

So, the fever plus a short generalized seizure in a 2-year-old aligns best with a febrile seizure, rather than the other seizure types. If the seizure lasts longer than 15 minutes, recurs within 24 hours, or there are signs of meningitis or a toxic-appearing child, additional evaluation is needed.