What does the acronym ESSENCE stand for?

A: Early Screening and Evaluation for Neurodevelopmental Conditions and Syndromes in Education

B: Early Symptomatic Syndromes Eliciting Neurodevelopmental Clinical Examinations

C: Established Syndromes in Early-onset Neurodevelopmental Conditions with Social and Educational needs

D: Early Symptomatic Signs Eliciting Neuropsychiatric Clinical Evaluations

Correct: Early Symptomatic Syndromes Eliciting Neurodevelopmental Clinical Examinations

ESSENCE stands for Early Symptomatic Syndromes Eliciting Neurodevelopmental Clinical Examinations. The term was coined by Gillberg to describe the reality of children — and their parents — presenting in clinical settings with impairing symptoms before age 3 (or 5) years across multiple domains of development. The acronym deliberately emphasises the early onset, the symptomatic (rather than definitively diagnostic) nature of the presentation, and the need for a clinical neurodevelopmental examination.

Match each ESSENCE domain to the type of difficulty it describes.

In Miniscalco et al.'s longitudinal study cited by Gillberg, children identified with Specific Language Impairment (SLI) at age 2.5 years were re-examined at age 7.5 years. What proportion was found to have ASD, ADHD, mental retardation, or borderline learning disability?

A: Approximately 25%

B: Approximately 50%

C: More than 70%

D: Approximately 90%

Correct: More than 70%

More than 70% of the children originally diagnosed with SLI at 2.5 years met criteria for ASD, ADHD, mental retardation, or borderline learning disability (or combinations) by age 7.5 years — none of which had been suspected at the time of the original SLI diagnosis. By ages 4 and 6, only a small fraction had been recognised as having ASD or ADHD, and an even smaller proportion had received appropriate interventions. This finding is central to Gillberg's argument: a child presenting with language delay should be treated as an ESSENCE presentation requiring multidisciplinary evaluation, not simply referred to a speech and language therapist alone.

According to Gillberg, "comorbidity" is an accurate and adequate term for describing the co-occurrence of neurodevelopmental disorders such as ASD and ADHD.

Answer: False

Gillberg explicitly calls "comorbidity" a misnomer — "a misnomer if ever there was one." In the literal sense, comorbidity implies two separate morbid (disease) conditions that happen to co-occur. But in the ESSENCE field, what clinicians usually mean is co-existence, association, or overlap — not necessarily two distinct diseases with independent aetiologies. Gillberg prefers terms such as "co-existence" or "overlap", and argues that the co-occurrence of ASD, ADHD, DCD, SLI, and other ESSENCE conditions reflects shared underlying neurodevelopmental processes, not simply the chance co-occurrence of independent disorders.

Gillberg argues that girls with ASD, ADHD, ODD, and SLI are significantly underdiagnosed. Which combination of factors does he identify as responsible for this?

A: Girls have lower genetic risk, so fewer actually meet diagnostic criteria

B: Girls tend to be less violent, less motorically active, more socially adept, and better at using language — all of which mask the early symptomatic presentation

C: Diagnostic tools are culturally biased and were designed exclusively for boys

D: Girls develop neurodevelopmental disorders later than boys, so early screening simply misses them

Correct: Girls tend to be less violent, less motorically active, more socially adept, and better at using language — all of which mask the early symptomatic presentation

Gillberg identifies a cluster of behavioural tendencies in girls that mask ESSENCE presentations: girls as a group tend to be less violent, less motorically active, more socially adept, and better at using language for communication. These traits mean that girls who fully meet diagnostic criteria for ASD or ADHD are less likely to come to clinical attention — particularly in the preschool years. Gillberg notes that with better clinical awareness, many more female cases are likely to be identified. He does not argue that girls have less genetic risk, but that the phenotype may differ.

According to the prevalence data summarised in Gillberg's Table 1, what is the estimated total prevalence of ESSENCE syndromes in the general child population when diagnostic overlap is taken into account?

A: 1–2%

B: 3–4%

C: 7–10%

D: 15–20%

Correct: 7–10%

Gillberg's Table 1 lists individual prevalence estimates for each ESSENCE syndrome (ASD ~1%, ADHD ~5%, ODD ~4%, SLI ~6%, LD ~1.5%, tic disorders/Tourette ~1%, behavioural phenotype syndromes ~0.7%, rare epilepsy ~0.01%). Taking overlap into account, the total prevalence is estimated at 7–10% of the general child population. Notably, the estimated 5–7% presenting clinically before age 6 years represents a lower figure because many cases do not come to clinical attention until school age, even though the underlying conditions are present and symptomatic from the preschool years.

Regarding Developmental Coordination Disorder (DCD) and its relationship to ADHD and ASD, which finding does Gillberg highlight from Swedish population research?

A: Children with ADHD who also have DCD have a very high risk of having impairing autistic symptomatology, whereas those with ADHD without DCD have a low risk of ASD

B: DCD is an entirely separate condition with no overlap with either ADHD or ASD

C: DCD is more strongly associated with ASD than with ADHD

D: Children with DCD only develop ADHD symptoms when exposed to stressful school environments

Correct: Children with ADHD who also have DCD have a very high risk of having impairing autistic symptomatology, whereas those with ADHD without DCD have a low risk of ASD

Kadesjö & Gillberg (1999) found a specific connection between ADHD, DCD, and ASD: approximately half of all children with ADHD also have DCD. Within the ADHD+DCD group, the risk of impairing autistic symptomatology is very high. Conversely, children with ADHD who do not have DCD have a low risk of ASD but a much higher risk of ODD and conduct problems. This suggests DCD acts as a mediating marker: its presence in an ADHD child should prompt evaluation for ASD. Gillberg uses this as evidence for the interconnected, overlapping nature of ESSENCE conditions.

What is Gillberg's central clinical recommendation arising from the ESSENCE framework?

A: Children should receive a single primary diagnosis as early as possible to allow specialist services to be allocated efficiently

B: Diagnosis should be delayed until school age when the full clinical picture is clearer

C: All preschool children presenting with major ESSENCE symptoms need a holistic, multidisciplinary assessment — not evaluation by a single specialist for one disorder

D: ESSENCE conditions are best treated with pharmacological interventions targeting the primary diagnosis

Correct: All preschool children presenting with major ESSENCE symptoms need a holistic, multidisciplinary assessment — not evaluation by a single specialist for one disorder

Gillberg's core recommendation is the creation of "Child ESSENCE Centres" providing holistic, multidisciplinary assessment and intervention for all preschool children presenting with major ESSENCE symptoms — rather than the current fragmented system in which a child with SLI sees only a speech and language therapist, or a child with suspected autism is evaluated only for autism. He emphasises urgency: "There is no time to wait." Major problems in at least one ESSENCE domain before age 5 signal major problems in overlapping domains years later. The solution is neither exclusively diagnostic "lumping" nor "splitting" but starting from a broad multidisciplinary base before progressively refining diagnosis and intervention.