Certain infectious and parasitic diseases
Certain infectious and parasitic diseases Certain infectious and parasitic diseases
ecognition, oral reading skill, and performance of tasks requiring reading may all be affected. Spelling difficulties are frequently associated with specific reading disorder and often remain into adolescence even after some progress in reading has been made. Specific developmental disorders of reading are commonly preceded by a history of disorders in speech or language development. Associated emotional and behavioural disturbances are common during the school age period. "Backward reading" Developmental dyslexia Specific reading retardation Excludes: alexia NOS ( R48.0 ) dyslexia NOS ( R48.0 ) reading difficulties secondary to emotional disorders ( F93.- ) F81.1 Specific spelling disorder The main feature is a specific and significant impairment in the development of spelling skills in the absence of a history of specific reading disorder, which is not solely accounted for by low mental age, visual acuity problems, or inadequate schooling. The ability to spell orally and to write out words correctly are both affected. Specific spelling retardation (without reading disorder) Excludes: agraphia NOS ( R48.8 ) spelling difficulties: · associated with a reading disorder ( F81.0 ) · due to inadequate teaching ( Z55.8 ) F81.2 Specific disorder of arithmetical skills Involves a specific impairment in arithmetical skills that is not solely explicable on the basis of general mental retardation or of inadequate schooling. The deficit concerns mastery of basic computational skills of addition, subtraction, multiplication, and division rather than of the more abstract mathematical skills involved in algebra, trigonometry, geometry, or calculus. Developmental: · acalculia · arithmetical disorder · Gerstmann's syndrome Excludes: acalculia NOS ( R48.8 ) arithmetical difficulties: · associated with a reading or spelling disorder ( F81.3 ) · due to inadequate teaching ( Z55.8 ) F81.3 Mixed disorder of scholastic skills An ill-defined residual category of disorders in which both arithmetical and reading or spelling skills are significantly impaired, but in which the disorder is not solely explicable in terms of general mental retardation or of inadequate schooling. It should be used for disorders meeting the criteria for both F81.2 and either F81.0 or F81.1. Excludes: specific: · disorder of arithmetical skills ( F81.2 ) · reading disorder ( F81.0 ) · spelling disorder ( F81.1 ) 218 WHO’s ICD-10
F81.8 Other developmental disorders of scholastic skills Developmental expressive writing disorder F81.9 Developmental disorder of scholastic skills, unspecified Knowledge acquisition disability NOS Learning: · disability NOS · disorder NOS F82 F83 Specific developmental disorder of motor function A disorder in which the main feature is a serious impairment in the development of motor coordination that is not solely explicable in terms of general intellectual retardation or of any specific congenital or acquired neurological disorder. Nevertheless, in most cases a careful clinical examination shows marked neurodevelopmental immaturities such as choreiform movements of unsupported limbs or mirror movements and other associated motor features, as well as signs of impaired fine and gross motor coordination. Clumsy child syndrome Developmental: · coordination disorder · dyspraxia Excludes: abnormalities of gait and mobility ( R26.- ) lack of coordination ( R27.- ) · secondary to mental retardation ( F70-F79 ) Mixed specific developmental disorders A residual category for disorders in which there is some admixture of specific developmental disorders of speech and language, of scholastic skills, and of motor function, but in which none predominates sufficiently to constitute the prime diagnosis. This mixed category should be used only when there is a major overlap between each of these specific developmental disorders. The disorders are usually, but not always, associated with some degree of general impairment of cognitive functions. Thus, the category should be used when there are dysfunctions meeting the criteria for two or more of F80.-, F81.- and F82. F84 Pervasive developmental disorders A group of disorders characterized by qualitative abnormalities in reciprocal social interactions and in patterns of communication, and by a restricted, stereotyped, repetitive repertoire of interests and activities. These qualitative abnormalities are a pervasive feature of the individual's functioning in all situations. Use additional code, if desired, to identify any associated medical condition and mental retardation. F84.0 Childhood autism A type of pervasive developmental disorder that is defined by: (a) the presence of abnormal or impaired development that is manifest before the age of three years, and (b) the characteristic type of abnormal functioning in all the three areas of psychopathology: reciprocal social interaction, communication, and restricted, stereotyped, repetitive behaviour. In addition to these specific diagnostic features, a range of other nonspecific problems are common, such as phobias, sleeping and eating disturbances, temper tantrums, and (self-directed) aggression. Version for 2007 219
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ecognition, oral reading skill, <strong>and</strong> performance of tasks requiring reading may all<br />
be affected. Spelling difficulties are frequently associated with specific reading<br />
disorder <strong>and</strong> often remain into adolescence even after some progress in reading<br />
has been made. Specific developmental disorders of reading are commonly<br />
preceded by a history of disorders in speech or language development.<br />
Associated emotional <strong>and</strong> behavioural disturbances are common during the<br />
school age period.<br />
"Backward reading"<br />
Developmental dyslexia<br />
Specific reading retardation<br />
Excludes: alexia NOS ( R48.0 )<br />
dyslexia NOS ( R48.0 )<br />
reading difficulties secondary to emotional disorders ( F93.- )<br />
F81.1 Specific spelling disorder<br />
The main feature is a specific <strong>and</strong> significant impairment in the development of<br />
spelling skills in the absence of a history of specific reading disorder, which is<br />
not solely accounted for by low mental age, visual acuity problems, or inadequate<br />
schooling. The ability to spell orally <strong>and</strong> to write out words correctly are both<br />
affected.<br />
Specific spelling retardation (without reading disorder)<br />
Excludes: agraphia NOS ( R48.8 )<br />
spelling difficulties:<br />
· associated with a reading disorder ( F81.0 )<br />
· due to inadequate teaching ( Z55.8 )<br />
F81.2 Specific disorder of arithmetical skills<br />
Involves a specific impairment in arithmetical skills that is not solely explicable<br />
on the basis of general mental retardation or of inadequate schooling. The deficit<br />
concerns mastery of basic computational skills of addition, subtraction,<br />
multiplication, <strong>and</strong> division rather than of the more abstract mathematical skills<br />
involved in algebra, trigonometry, geometry, or calculus.<br />
Developmental:<br />
· acalculia<br />
· arithmetical disorder<br />
· Gerstmann's syndrome<br />
Excludes: acalculia NOS ( R48.8 )<br />
arithmetical difficulties:<br />
· associated with a reading or spelling disorder ( F81.3 )<br />
· due to inadequate teaching ( Z55.8 )<br />
F81.3 Mixed disorder of scholastic skills<br />
An ill-defined residual category of disorders in which both arithmetical <strong>and</strong><br />
reading or spelling skills are significantly impaired, but in which the disorder is<br />
not solely explicable in terms of general mental retardation or of inadequate<br />
schooling. It should be used for disorders meeting the criteria for both F81.2 <strong>and</strong><br />
either F81.0 or F81.1.<br />
Excludes: specific:<br />
· disorder of arithmetical skills ( F81.2 )<br />
· reading disorder ( F81.0 )<br />
· spelling disorder ( F81.1 )<br />
218 WHO’s ICD-10