Question

A child presents with short episodes of vacant stare several times a day. The vacant episode begins abruptly and the child remains unresponsive during the episode. There is no associated history of aura or postictal confusion and the child is otherwise normal. The likely diagnosis is:

• A. Grand mal seizures
• B. Absence seizures
• C. Complex partial seizures
• D. Day dreaming

Hint:

Brief, frequent staring with sudden onset and offset and no aura or postictal confusion equals 3 Hz spike and wave.

Answer 1

The Correct Option is B

Step 1: Pick out the key clinical features. The episodes are brief, occur many times a day, start abruptly, and involve a vacant stare with loss of responsiveness. There is no aura before and no confusion after the spell. The child is normal otherwise.

Step 2: Match this picture to a seizure type. Brief (5 to 10 second), frequent staring spells with sudden onset and offset and no postictal phase are the hallmark of typical absence seizures (childhood absence epilepsy). The EEG shows a classic 3 Hz generalized spike and wave pattern, and hyperventilation often triggers an attack.

Step 3: Rule out the distractors.
Grand mal (generalized tonic clonic) seizures cause loss of consciousness with falling, limb stiffening and jerking, and clear postictal drowsiness or confusion. None of that is present here.
Complex partial (focal impaired awareness) seizures usually last longer, often have an aura, frequently show automatisms like lip smacking, and are followed by postictal confusion. The absence of aura and postictal confusion argues against this.
Day dreaming can be interrupted by calling the child and lacks the abrupt automatic onset and the very high daily frequency; it is a diagnosis of exclusion and does not fit a true ictal stare.

Step 4: The brief, abrupt, frequent staring spell with no aura and no postictal confusion is classic for absence seizures.

The correct answer is option B, Absence seizures.