Sudden changes in behaviour and concentration problems can be caused by @entity159 . This generalised form of @entity302 can be easily missed as a diagnosis. In this case report series we describe three adolescent @entity1 (13, 14 and 17 years old respectively) presenting with behavioural disturbances caused by idiopathic @entity159 . The diagnosis was confirmed by electroencephalography (EEG). The medical history mentioned previous episodes of changes in behaviour in all @entity1 . The 14-year-old @entity1 was diagnosed with @entity71 ( @entity71 ). It is questionable whether this diagnosis was justified, or whether his behavioural problems were caused by non-convulsive @entity302 . @entity159 is characterised by diminished cognitive functioning in an otherwise reactive @entity1 . Testing of memory and other cognitive functions is essential for diagnosis. All @entity1 with behavioural problems should undergo a thorough neurological assessment by a paediatrician or neurologist in order to recognise non-convulsive @entity302 .

[Concentration problem or XXXX ? Sudden changes in behaviour in adolescents].

@entity1 :: ('9606', 'Species') :: ['children', 'patients', 'patient', 'boy', 'boys'] @entity71 :: ('MESH:D001289', 'Disease') :: ['ADHD', 'attention deficit hyperactivity disorder'] @entity302 :: ('MESH:D004827', 'Disease') :: ['epileptic seizures', 'epilepsy'] @entity159 :: ('MESH:D013226', 'Disease') :: ['Non-convulsive status epilepticus', 'non-convulsive status epilepticus']
@entity302 :: (MESH:D004827,Disease) :: ['epilepsy']
