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1.

Pitt-Hopkins syndrome

Pitt-Hopkins syndrome (PTHS) is characterized by distinctive facial features which become more apparent with age (100%), developmental delay/intellectual disability (100%), and episodic hyperventilation and/or breath-holding while awake (55%-60%). Global developmental delays are significant and intellectual disability is moderate to severe: mean age of walking is four to six years; most affected individuals are nonverbal. Other common findings are behavioral issues, hand stereotypic movements, seizures (40%-50%), constipation, and severe myopia. [from GeneReviews]

MedGen UID:
370910
Concept ID:
C1970431
Disease or Syndrome
2.

Intellectual functioning disability

Subnormal intellectual functioning which originates during the developmental period. Intellectual disability, previously referred to as mental retardation, has been defined as an IQ score below 70. [from HPO]

MedGen UID:
7544
Concept ID:
C0025362
Mental or Behavioral Dysfunction
3.

Intellectual disability

Subnormal intellectual functioning which originates during the developmental period. Intellectual disability, previously referred to as mental retardation, has been defined as an IQ score below 70. [from HPO]

MedGen UID:
334384
Concept ID:
C1843367
Finding
4.

Severe muscular hypotonia

A severe degree of muscular hypotonia characterized by markedly reduced muscle tone. [from HPO]

MedGen UID:
326544
Concept ID:
C1839630
Finding
5.

Intellectual disability, severe

Severe mental retardation is defined as an intelligence quotient (IQ) in the range of 20-34. [from HPO]

MedGen UID:
48638
Concept ID:
C0036857
Finding; Mental or Behavioral Dysfunction
6.

Ataxia

A type of ataxia characterized by the impairment of the ability to smoothly perform the elements of a voluntary movement in the appropriate order and speed. With dyssynergia, a voluntary movement appears broken down into its component parts. [from HPO]

MedGen UID:
13945
Concept ID:
C0004134
Sign or Symptom
7.

Hyperventilation

Hyperventilation refers to an increased pulmonary ventilation rate that is faster than necessary for the exchange of gases. Hyperventilation can result from increased frequency of breathing, an increased tidal volume, or both, and leads to an excess intake of oxygen and the blowing off of carbon dioxide. [from HPO]

MedGen UID:
9377
Concept ID:
C0020578
Finding
8.

Facial features

MedGen UID:
880870
Concept ID:
CN236432
Finding
9.

Distinctive facial features

MedGen UID:
833083
Concept ID:
CN228801
Finding
10.

Muscular hypotonia

Muscular hypotonia is an abnormally low muscle tone (the amount of tension or resistance to movement in a muscle), often involving reduced muscle strength. Hypotonia is characterized by a diminished resistance to passive stretching. [from HPO]

MedGen UID:
504768
Concept ID:
CN001147
Finding
11.

Fanconi anemia, complementation group E

Fanconi anemia (FA) is characterized by physical abnormalities, bone marrow failure, and increased risk for malignancy. Physical abnormalities, present in approximately 75% of affected individuals, include one or more of the following: short stature, abnormal skin pigmentation, skeletal malformations of the upper and lower limbs, microcephaly, and ophthalmic and genitourinary tract anomalies. Progressive bone marrow failure with pancytopenia typically presents in the first decade, often initially with thrombocytopenia or leukopenia. The incidence of acute myeloid leukemia is 13% by age 50 years. Solid tumors – particularly of the head and neck, skin, gastrointestinal tract, and genitourinary tract – are more common in individuals with FA. [from GeneReviews]

MedGen UID:
463628
Concept ID:
C3160739
Disease or Syndrome
12.

Generalized hypotonia

Generalized muscular hypotonia (abnormally low muscle tone). [from HPO]

MedGen UID:
346841
Concept ID:
C1858120
Finding
13.

Absent speech

Complete lack of development of speech and language abilities. [from HPO]

MedGen UID:
340737
Concept ID:
C1854882
Finding
14.

Coarse facial features

Absence of fine and sharp appearance of brows, nose, lips, mouth, and chin, usually because of rounded and heavy features or thickened skin with or without thickening of subcutaneous and bony tissues. [from HPO]

MedGen UID:
335284
Concept ID:
C1845847
Finding
15.

Broad flat nasal bridge

Increased breadth of the nasal bridge (and with it, the nasal root). [from HPO]

MedGen UID:
326959
Concept ID:
C1839764
Finding
16.

Pallister-Hall syndrome

Pallister-Hall syndrome (referred to as PHS in this entry) is characterized by a spectrum of anomalies ranging from polydactyly, asymptomatic bifid epiglottis, and hypothalamic hamartoma at the mild end to laryngotracheal cleft with neonatal lethality at the severe end. Individuals with mild PHS may be incorrectly diagnosed as having isolated postaxial polydactyly type A. Individuals with PHS can have pituitary insufficiency and may die as neonates from undiagnosed and untreated adrenal insufficiency. [from GeneReviews]

MedGen UID:
120514
Concept ID:
C0265220
Disease or Syndrome
17.

Wide mouth

Greatly exaggerated width of the mouth, resulting from failure of union of the maxillary and mandibular processes, with extension of the oral orifice toward the ear. The defect may be unilateral or bilateral. (Dorland, 27th ed) [from MeSH]

MedGen UID:
44238
Concept ID:
C0024433
Congenital Abnormality
18.

Mental disorder

Mental disorders include a wide range of problems, including. -Anxiety disorders, including panic disorder, obsessive-compulsive disorder, post-traumatic stress disorder, and phobias. -Bipolar disorder. -Depression. -Mood disorders. -Personality disorders. -Psychotic disorders, including schizophrenia. There are many causes of mental disorders. Your genes and family history may play a role. Your life experiences, such as stress or a history of abuse, may also matter. Biological factors can also be part of the cause. A traumatic brain injury can lead to a mental disorder. A mother's exposure to viruses or toxic chemicals while pregnant may play a part. Other factors may increase your risk, such as use of illegal drugs or having a serious medical condition like cancer. Medications and counseling can help many mental disorders. .  [from MedlinePlus]

MedGen UID:
14047
Concept ID:
C0004936
Mental or Behavioral Dysfunction
19.

Muscular hypotonia

Muscular hypotonia is an abnormally low muscle tone (the amount of tension or resistance to movement in a muscle), often involving reduced muscle strength. Hypotonia is characterized by a diminished resistance to passive stretching. [from HPO]

MedGen UID:
10133
Concept ID:
C0026827
Finding; Finding
20.

Ataxia

Cerebellar ataxia refers to ataxia due to dysfunction of the cerebellum. This causes a variety of elementary neurological deficits including asynergy (lack of coordination between muscles, limbs and joints), dysmetria (lack of ability to judge distances that can lead to under- oder overshoot in grasping movements), and dysdiadochokinesia (inability to perform rapid movements requiring antagonizing muscle groups to be switched on and off repeatedly). [from HPO]

MedGen UID:
849
Concept ID:
C0007758
Sign or Symptom
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