5.2.10 Other Childhood Disorders

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Other Childhood Disorders

In addition to the childhood conditions listed above, some other childhood disorders that may fall under the purview of child and adolescent psychiatry include:

Learning disorders:

Learning disorders are a group of neurodevelopmental disorders that affect a child’s ability to learn and use academic skills, such as reading, writing, and math, despite normal intelligence and appropriate instruction. The prevalence of learning disorders in children is estimated to be around 5-10%, and the aetiology is believed to be multifactorial, involving genetic, environmental, and neurobiological factors. Children with learning disorders may present with a range of symptoms, including difficulties with phonological processing, working memory, and executive functioning. Treatment for learning disorders often involves a combination of educational interventions, such as individualized education plans (IEPs) and special education services, as well as behavioural interventions and medication, depending on the specific symptoms and severity of the disorder. With appropriate interventions, many children with learning disorders can achieve significant improvements in their academic skills and overall functioning.

Examples of learning disorders: Dyslexia, dyscalculia, dysgraphia.

Communication disorders:

Communication disorders are a group of neurodevelopmental disorders that affect a child’s ability to use and understand language, including speech-sound disorders, language disorders, and social communication disorders. The prevalence of communication disorders in children is estimated to be around 7-8%, and the aetiology is believed to be multifactorial, involving genetic, environmental, and neurobiological factors. Children with communication disorders may present with a range of symptoms, including difficulties with articulation, grammar, vocabulary, and social communication. Treatment for communication disorders often involves a combination of speech and language therapy, behavioural interventions, and assistive technology, depending on the specific symptoms and severity of the disorder. With appropriate interventions, many children with communication disorders can achieve significant improvements in their language skills and overall functioning.

Landau-Kleffner Syndrome (LKS) is a rare childhood neurological disorder characterised by the sudden or gradual development of aphasia (loss of language skills) and frequently, epileptic seizures. Children with LKS typically develop normally and then, over a period of days to months, lose the ability to understand and use spoken language.

Examples of communication disorders: Language Disorder, Speech Sound Disorder, Childhood-Onset Fluency Disorder (Stuttering), Social (Pragmatic) Communication Disorder, and Landau-Kleffner Syndrome.

Intellectual disability:

Intellectual disability is a neurodevelopmental disorder characterised by significant limitations in intellectual functioning and adaptive behaviours that arise during the developmental period. The prevalence of intellectual disability in children is estimated to be around 1-3%, and the aetiology is believed to be multifactorial, involving genetic, environmental, and other factors such as trauma or infection during pregnancy or early childhood. Children with intellectual disabilities may present with a range of symptoms, including delays in reaching developmental milestones, difficulties with learning and problem-solving, and challenges with communication and social skills. Treatment for intellectual disability often involves a combination of educational interventions, such as individualised education plans (IEPs) and special education services, as well as behavioural interventions and medication, depending on the specific symptoms and severity of the disorder. With appropriate interventions and support, many children with intellectual disabilities can achieve significant improvements in their adaptive functioning and quality of life.

Examples of intellectual disability: Varies in severity, often diagnosed based on deficits in intellectual and adaptive functioning.

Sleep disorders:

Sleep disorders are a group of conditions that affect a child’s ability to sleep, including insomnia, sleep apnea, and restless leg syndrome. The prevalence of sleep disorders in children is estimated to be around 25-30%, and the aetiology is believed to be multifactorial, involving genetic, environmental, and behavioural factors. Children with sleep disorders may present with a range of symptoms, including difficulty falling asleep or staying asleep, snoring, breathing pauses during sleep, and leg discomfort. Treatment for sleep disorders often involves a combination of behavioural interventions, such as improving sleep hygiene and establishing a regular bedtime routine, as well as medication or continuous positive airway pressure (CPAP) therapy, depending on the specific symptoms and severity of the disorder. With appropriate interventions, many children with sleep disorders can achieve significant improvements in their sleep quality and overall functioning. However, untreated sleep disorders can lead to significant impairment in daytime functioning, cognitive and behavioural problems, and other health complications.

Examples of sleep disorders: Insomnia, Sleep Apnea, Restless Legs Syndrome, Narcolepsy.

Disruptive mood dysregulation disorder:

Disruptive mood dysregulation disorder (DMDD) is a neurodevelopmental disorder characterized by severe and frequent temper outbursts that are disproportionate to the situation and inconsistent with the developmental level, along with persistent irritability or anger between the outbursts. The prevalence of DMDD in children is estimated to be around 2-5%, and the aetiology is believed to be multifactorial, involving genetic, environmental, and neurobiological factors. Children with DMDD may present with a range of symptoms, including chronic irritability, frequent tantrums, mood lability, and difficulties with emotional regulation. Treatment for DMDD often involves a combination of behavioural interventions, such as parent-child interaction therapy and cognitive-behavioural therapy, as well as medication, such as antidepressants and antipsychotics, depending on the specific symptoms and severity of the disorder. With appropriate interventions, many children with DMDD can achieve significant improvements in their emotional regulation and overall functioning. However, untreated DMDD can lead to significant impairment in social and academic functioning and may increase the risk for other mental health problems, such as depression and anxiety.

Example of DMDD: Characterised by severe recurrent temper outbursts and persistent irritable or angry mood.

Elimination disorders:

Elimination disorders refer to a group of conditions that involve inappropriate elimination of urine or faeces beyond the expected age of control, including enuresis and encopresis. The prevalence of elimination disorders in children is estimated to be around 5-10%, and the aetiology is believed to be multifactorial, involving genetic, environmental, and psychosocial factors. Children with elimination disorders may present with a range of symptoms, including bed-wetting, daytime urinary or faecal incontinence, and withholding or avoiding bowel movements. Treatment for elimination disorders often involves a combination of behavioural interventions, such as bladder training and toilet training, as well as medication, such as desmopressin and laxatives, depending on the specific symptoms and severity of the disorder. With appropriate interventions, many children with elimination disorders can achieve significant improvements in their elimination control and overall functioning. However, untreated elimination disorders can lead to significant impairment in social and academic functioning and may increase the risk for other mental health problems, such as anxiety and depression.

Examples of elimination disorders: Enuresis (bedwetting), Encopresis (faecal incontinence).

Gender dysphoria:

Gender dysphoria refers to the distress experienced by individuals whose gender identity does not align with their assigned sex at birth. In children and adolescents, the aetiology is multifactorial, encompassing biological, psychological, and environmental factors, though the precise interplay remains an area of ongoing research. Prevalence rates are hard to pinpoint but have seen a noticeable increase in recent years, possibly due to greater societal awareness and acceptance. Management is multidisciplinary, involving psychological support, social transition, and, in appropriate adolescents, medical interventions such as hormone blockers or cross-sex hormones. Early recognition and individualised care are crucial, as these young individuals are at higher risk for mental health issues, including anxiety, depression, and self-harm.

Example of gender dysphoria: A condition where there is a conflict between a person’s physical or assigned gender and the gender with which they identify.

Condition	Prevalence	Aetiology	Presentation	Treatment	Outcome
Learning Disorders	5-15%	Genetic, environmental	Difficulty with reading, writing, math, or attention	Educational interventions, accommodations	Improved academic functioning, but may persist into adulthood
Communication Disorders	5-10%	Genetic, environmental	Difficulty with speech, language, or social communication	Speech therapy, language interventions	Improved communication skills, but may persist into adulthood
Intellectual Disability	1-3%	Genetic, environmental	Impaired cognitive functioning and adaptive skills	Educational and behavioural interventions, supportive services	Improved adaptive skills, but may persist into adulthood
Motor Disorders	Varies	Genetic, environmental	Impaired motor coordination or control	Physical therapy, medication	Improved motor function, but may persist into adulthood
Sleep Disorders	Varies	Genetic, environmental	Difficulty falling or staying asleep, abnormal sleep patterns	Behavioural interventions, medication	Improved sleep quality and daytime functioning
Disruptive Mood Dysregulation Disorder	2-5%	Genetic, environmental	Frequent and severe temper outbursts, irritable or angry mood	Psychotherapy, medication	Improved emotional regulation and functioning
Elimination Disorders	5-10%	Multifactorial	Inappropriate elimination of urine or faeces beyond the expected age of control	Behavioural interventions, medication	Improved elimination control and functioning
Gender Dysphoria	0.005% to 0.014%	Complex, multifactorial	Distress due to mismatch between gender identity and assigned sex	A multidisciplinary approach, including therapy and hormone therapy	Improved psychological well-being and quality of life

References:

1. American Psychiatric Association. (2013). Diagnostic and statistical manual of mental disorders (5th ed.). Washington, DC: Author.
2. Lyon, G. R., Shaywitz, S. E., & Shaywitz, B. A. (2003). Defining dyslexia, comorbidity, teachers’ knowledge of language and reading: A definition of dyslexia. Annals of Dyslexia, 53, 1–14.
3. American Psychiatric Association. (2013). Diagnostic and statistical manual of mental disorders (5th ed.). Washington, DC: Author.
4. Paul, R. (2007). Language disorders from infancy through adolescence: Assessment and intervention (3rd ed.). St. Louis, MO: Mosby.
5. American Psychiatric Association. (2013). Diagnostic and statistical manual of mental disorders (5th ed.). Washington, DC: Author.
6. Luckasson, R., Borthwick-Duffy, S., Buntinx, W. H. E., Coulter, D. L., Craig, E. M., Reeve, A., . . . Schalock, R. L. (2002). Mental retardation: Definition, classification, and systems of supports (10th ed.). Washington, DC: American Association on Mental Retardation.
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9. American Academy of Sleep Medicine. (2014). International classification of sleep disorders (3rd ed.). Darien, IL: Author.
10. Owens, J. A., & Moturi, S. (2009). Pharmacotherapy for pediatric sleep disturbances. Child and Adolescent Psychiatric Clinics of North America, 18(4), 1001–1016.
11. American Psychiatric Association. (2013). Diagnostic and statistical manual of mental disorders (5th ed.). Washington, DC: Author.
12. Leibenluft, E. (2011). Severe mood dysregulation, irritability, and the diagnostic boundaries of bipolar disorder in youths. American Journal of Psychiatry, 168(2), 129–142.
13. American Psychiatric Association. (2013). Diagnostic and statistical manual of mental disorders (5th ed.). Washington, DC: Author.
14. Joinson, C., Heron, J., Von Gontard, A., Butler, U., & Emond, A. (2006). Psychological differences between children with and without soiling problems. Pediatrics, 117(5), 1575–1584.
15. American Psychiatric Association. (2013). Diagnostic and statistical manual of mental disorders (5th ed.). Washington, DC: Author.
16. Cohen-Kettenis, P. T., & Pfäfflin, F. (2010). The DSM diagnostic criteria for gender identity disorder in adolescents and adults. Archives of Sexual Behavior, 39(2), 499–513.