[…] disability ; delayed or absent speech; behavioral abnormalities; and seizures .[1][2] Most cases of isodicentric chromosome 15 syndrome occur sporadically in people with no family history of the condition.[3][1] Treatment is based on the signs and symptoms present [rarediseases.info.nih.gov]

• Poor Feeding

  […] difficulties Feeding problems Poor feeding [ more ] 0011968 Hyperactivity More active than typical 0000752 Seizure 0001250 Self-biting 0012169 Severe expressive language delay 0006863 Severe receptive language delay 0011352 Stereotypy Repetitive movements [rarediseases.info.nih.gov]

• Short Finger

  […] and broad skull 0000248 Brachydactyly Short fingers or toes 0001156 Broad nasal tip Broad tip of nose Broad, upturned nose Increased breadth of nasal tip Increased breadth of tip of nose Increased width of nasal tip Increased width of tip of nose Nasal [rarediseases.info.nih.gov]

• Precocious Puberty

  puberty Early onset of puberty Early puberty [ more ] 0000826 Talipes equinovarus Club feet Club foot Clubfeet Clubfoot [ more ] 0001762 Tetralogy of Fallot 0001636 Unilateral renal agenesis Absent kidney on one side Missing one kidney Single kidney [rarediseases.info.nih.gov]

• Strabismus

  […] activity of gonads 0000135 Low-set, posteriorly rotated ears 0000368 Microcephaly Abnormally small skull Decreased circumference of cranium Decreased size of skull Reduced head circumference Small head circumference [ more ] 0000252 Short philtrum 0000322 Strabismus [rarediseases.info.nih.gov]

• Brachydactyly

  […] these symptoms 2-3 toe syndactyly Webbed 2nd and 3rd toes 0004691 Abnormal facial shape Unusual facial appearance 0001999 Aggressive behavior Aggression Aggressive behaviour Aggressiveness [ more ] 0000718 Brachycephaly Short and broad skull 0000248 Brachydactyly [rarediseases.info.nih.gov]

• Small Head

  […] skull Decreased circumference of cranium Decreased size of skull Reduced head circumference Small head circumference [ more ] 0000252 Short philtrum 0000322 Strabismus Cross-eyed Squint Squint eyes [ more ] 0000486 Synophrys Monobrow Unibrow [ more ] [rarediseases.info.nih.gov]

• Low-Set Posteriorly Rotated Ears

  Growth failure Growth retardation Poor growth Retarded growth [ more ] 0001510 High palate Elevated palate Increased palatal height [ more ] 0000218 Hypogonadism Decreased activity of gonads 0000135 Low-set, posteriorly rotated ears 0000368 Microcephaly [rarediseases.info.nih.gov]

• Aggressive Behavior

  [ more ] 0000733 5%-29% of people have these symptoms 2-3 toe syndactyly Webbed 2nd and 3rd toes 0004691 Abnormal facial shape Unusual facial appearance 0001999 Aggressive behavior Aggression Aggressive behaviour Aggressiveness [ more ] 0000718 Brachycephaly [rarediseases.info.nih.gov]

• Cryptorchidism

  Decreased size of skull Reduced head circumference Small head circumference [ more ] 0000252 Short philtrum 0000322 Strabismus Cross-eyed Squint Squint eyes [ more ] 0000486 Synophrys Monobrow Unibrow [ more ] 0000664 1%-4% of people have these symptoms Cryptorchidism [rarediseases.info.nih.gov]

• Echolalia

  […] behavior 0000729 Drooling Dribbling 0002307 Generalized hypotonia Decreased muscle tone Low muscle tone [ more ] 0001290 Joint hypermobility Double-Jointed Flexible joints Increased mobility of joints [ more ] 0001382 30%-79% of people have these symptoms Echolalia [rarediseases.info.nih.gov]

Many develop patient-centered information and are the driving force behind research for better treatments and possible cures. They can direct you to research, resources, and services. [rarediseases.info.nih.gov]