Some persons with Asperger's Disorder come across as merely eccentric or odd. Persons with Asperger's Disorder may be preoccupied with and may only want to talk about a particular area of interest to them. They may have difficulty switching from one activity or topic to another and may prefer sameness. They often have obsessive routines and may demand that others comply with them as well. As with the other autism spectrum disorders, they may be overly sensitive to sounds, tastes, smells, and sights.
Males are typically more severely affected than females.
Emotional and behavioral problems are common in both sexes. Fragile X Syndrome is caused by a chromosomal abnormality. In Fragile X Syndrome, a portion of the X chromosome is somewhat longer than normal. Genetic testing is available to diagnose Fragile X Syndrome. Teresa Binstock on Landau-Kleffner and the Herpes Simplex Virus.