Table 1.
Condition | Report | Ages/Stages | Specific Skills Lost | Associations? |
---|---|---|---|---|
Kleefsta Syndrome | Kleefstra et al. (2009) | Various ages | toileting, eating, loss of interest, undefined | |
Phelan-McDermid Syndrome |
Denayer et al. (2012) Serret et al. (2015) |
Not reported 12–13 years |
language, fine motor, gross motor, daily living skills, social engagement | |
Reierson et al. (2017) | Range from 18 months to 18 years | |||
Christianson Syndrome | Pescosolido et al. (2014) | Range from 15 months to 16 years | Language (words or sounds) (57%); walking (57%), eating (14%) fine motor (14%) eye contact/facial expression (14%) | |
15q Duplication | Conant et al. (2014) | Not reported | 20/33 cases associated with epilepsy | |
Rett Syndrome/CDKL5 | see Neul et al (2010; 2014) for reviews | Most often between 6 & 30 months | fine motor; language; gross motor | |
Down Syndrome | Castillo et al. (2008) | Language Loss months Other skill loss months | language loss; other skills (not specified) |