Symptom Information: Sort according to HPO 

1
(HPO:0000717) Autism 108 / 7739
2
(HPO:0000721) Lack of spontaneous play 11 / 7739
3
(HPO:0000723) Restrictive behavior 11 / 7739
4
(HPO:0000732) Inflexible adherence to routines or rituals 11 / 7739
5
(HPO:0000733) Stereotypy 58 / 7739
6
(HPO:0000750) Delayed speech and language development 197 / 7739
7
(HPO:0000758) Impaired use of nonverbal behaviors 11 / 7739
8
(HPO:0001249) Intellectual disability 1089 / 7739
9
(HPO:0001250) Seizures frequent [HPO] 1245 / 7739
10
(HPO:0002332) Lack of peer relationships 3 / 7739
11
(HPO:0002353) EEG abnormality frequent [HPO] 188 / 7739
12
(HPO:0003144) Increased serum serotonin frequent [HPO] 7 / 7739
13
(HPO:0000735) Impaired social interactions 20 / 7739
14
(OMIM) Impaired use of nonverbal behaviors, such as eye-to-eye gaze, facial expression, body posture, and gestures 11 / 7739
15
(OMIM) Impaired language development 6 / 7739
16
(OMIM) Stereotyped, repetitive behavior 11 / 7739
17
(OMIM) Mental retardation in 75% 7 / 7739
18
(OMIM) Seizures in 15-30% 7 / 7739
19
(OMIM) EEG abnormalities in 20-50% 6 / 7739
20
(OMIM) Increased serum serotonin in 25% 7 / 7739
21
(HPO:0001417) X-linked inheritance 173 / 7739
22
(HPO:0001426) Multifactorial inheritance 37 / 7739
23
(HPO:0003745) Sporadic 131 / 7739
24
(HPO:0011463) Childhood onset 65 / 7739