What are the symptoms of Angelman syndrome ?
What are the signs and symptoms of Angelman syndrome? The Human Phenotype Ontology provides the following list of signs and symptoms for Angelman syndrome. If the information is available, the table below includes how often the symptom is seen in people with this condition. You can use the MedlinePlus Medical Dictionary to look up the definitions for these medical terms. Signs and Symptoms Approximate number of patients (when available) Abnormality of the tongue 90% Behavioral abnormality 90% Broad-based gait 90% Cerebral cortical atrophy 90% Clumsiness 90% Cognitive impairment 90% EEG abnormality 90% Incoordination 90% Mandibular prognathia 90% Muscular hypotonia 90% Neurological speech impairment 90% Seizures 90% Sporadic 75% Abnormality of the teeth 50% Hyperreflexia 50% Malar flattening 50% Wide mouth 50% Hernia of the abdominal wall 7.5% Strabismus 7.5% Absent speech - Autosomal dominant inheritance - Blue irides - Brachycephaly - Constipation - Deeply set eye - Drooling - Exotropia - Fair hair - Feeding difficulties in infancy - Flat occiput - Hyperactivity - Hypopigmentation of the skin - Hypoplasia of the maxilla - Intellectual disability, progressive - Intellectual disability, severe - Limb tremor - Macroglossia - Motor delay - Myopia - Nystagmus - Obesity - Paroxysmal bursts of laughter - Progressive gait ataxia - Protruding tongue - Scoliosis - Sleep-wake cycle disturbance - Widely spaced teeth - The Human Phenotype Ontology (HPO) has collected information on how often a sign or symptom occurs in a condition. Much of this information comes from Orphanet, a European rare disease database. The frequency of a sign or symptom is usually listed as a rough estimate of the percentage of patients who have that feature. The frequency may also be listed as a fraction. The first number of the fraction is how many people had the symptom, and the second number is the total number of people who were examined in one study. For example, a frequency of 25/25 means that in a study of 25 people all patients were found to have that symptom. Because these frequencies are based on a specific study, the fractions may be different if another group of patients are examined. Sometimes, no information on frequency is available. In these cases, the sign or symptom may be rare or common.