| HPO |
HP:0001251 |
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- or overshoot in grasping movements), and dysdiadochokinesia (inability to perform rapid movements requiring antagonizing muscle groups to be switched on and off repeatedly)." [HPO:probinson] |
Ataxia can be differentiated into dyssynergy, asynergy, dysmetria (hypometria, hypermetria), dysdiadochokinesis, gait ataxia, truncal ataxia, limb ataxia, and dysarthria). Note: This term does not include sensory ataxia. |
HP:0011443 |
| HPO |
HP:0001166 |
Arachnodactyly |
"Abnormally long and slender fingers (\"spider fingers\")." [HPO:probinson] |
— |
HP:0001238, HP:0100807 |
| HPO |
HP:0000348 |
High forehead |
"An abnormally increased height of the forehead." [HPO:probinson] |
— |
HP:0000290 |
| HPO |
HP:0002808 |
Kyphosis |
"Exaggerated anterior convexity of the thoracic vertebral column." [HPO:probinson] |
— |
HP:0010674 |
| HPO |
HP:0000252 |
Microcephaly |
"Head circumference below 2 standard deviations below the mean for age and gender." [PMID:15806441, PMID:19125436, PMID:25465325, PMID:9683597] |
Head circumference is measured from just above the glabella (the most prominent point on the frontal bone above the root of the nose) to the most posterior prominent point of the occipital bone using a tape measure. Some standard charts are organized by centiles, others by standard deviations. It is important to add an indication of how far below the normal standard the head circumference is if an accurate assessment of this can be made. Microcephaly is an absolute term. The term relative microcephaly can be used when the head size centile is less than the centile for height, for example, head size at the 3rd centile with height at the 75% for age and sex. On prenatal ultrasound, microcephaly is diagnosed if the head circumference or the biparietal diameter is more than three standard deviations below the mean. Microcephaly is divided into primary microcephaly, which is present at birth, and secondary microcephaly, which develops postnatally. The crucial difference between these groupings is that primary microcephaly is usually a static developmental anomaly, whereas secondary microcephaly indicates a progressive neurodegenerative condition |
HP:0007364, HP:0040195 |
| HPO |
HP:0001028 |
Hemangioma |
"A hemangioma is a benign tumor characterized by blood-filled spaces lined by benign endothelial cells. A hemangioma characterized by large endothelial spaces (caverns) is called a cavernous hemangioma (in contrast to a hemangioma with small endothelial spaces, which is called capillary hemangioma)." [HPO:probinson] |
— |
HP:0100742 |
| HPO |
HP:0000648 |
Optic atrophy |
"Atrophy of the optic nerve. Optic atrophy results from the death of the retinal ganglion cell axons that comprise the optic nerve and manifesting as a pale optic nerve on fundoscopy." [HPO:probinson] |
The diagnosis of optic atrophy is made when the optic disc loses its normal orange-pink color. Optic atrophy is an end stage that arises from myriad causes of optic nerve damage anywhere along the path from the retina to the lateral geniculate. Some of the most common etiologies are advanced glaucoma, optic neuritis, arteritic or non-arteritic ischaemic optic neuropathy or a compressive lesion. |
HP:0012795 |
| HPO |
HP:0006703 |
Aplasia/Hypoplasia of the lungs |
— |
— |
HP:4000059 |
| HPO |
HP:0010864 |
Intellectual disability, severe |
"Severe mental retardation is defined as an intelligence quotient (IQ) in the range of 20-34." [HPO:probinson] |
Persons with severe mental retardation can be taught basic life skills and simple tasks with supervision. |
HP:0001249 |
| HPO |
HP:0001519 |
Disproportionate tall stature |
"A tall and slim body build with increased arm span to height ratio (>1.05) and a reduced upper-to-lower segment ratio (<0.85), i.e., unusually long arms and legs. The extremities as well as the hands and feet are unusually slim." [DDD:hfirth, HPO:probinson] |
— |
HP:0000098 |
| HPO |
HP:0002650 |
Scoliosis |
"The presence of an abnormal lateral curvature of the spine." [HPO:probinson] |
— |
HP:0010674 |
| HPO |
HP:0000485 |
Megalocornea |
"An enlargement of the cornea with normal clarity and function. Megalocornea is diagnosed with a horizontal corneal diameter of 12 mm or more at birth or 13 mm or more after two years of age." [HPO:curators] |
— |
HP:0001120 |
| HPO |
HP:0001558 |
Decreased fetal movement |
"An abnormal reduction in quantity or strength of fetal movements." [HPO:curators] |
— |
HP:0001557 |
| HPO |
HP:0000639 |
Nystagmus |
"Rhythmic, involuntary oscillations of one or both eyes related to abnormality in fixation, conjugate gaze, or vestibular mechanisms." [HPO:curators] |
— |
HP:0012547 |
| HPO |
HP:0001250 |
Seizure |
"A seizure is an intermittent abnormality of nervous system physiology characterised by a transient occurrence of signs and/or symptoms due to abnormal excessive or synchronous neuronal activity in the brain." [HPO:probinson, PMID:15816939] |
A type of electrographic seizure has been proposed in neonates which does not have a clinical correlate, it is electrographic only. The term epilepsy is not used to describe recurrent febrile seizures. Epilepsy presumably reflects an abnormally reduced seizure threshold. |
HP:0012638 |
| HPO |
HP:0002553 |
Highly arched eyebrow |
"Increased height of the central portion of the eyebrow, forming a crescent, semicircular, or inverted U shape." [PMID:19125427] |
Most eyebrows have some arch with downturning medially and laterally. |
HP:0000534 |
| HPO |
HP:0000647 |
Sclerocornea |
"A congenital anomaly in which a part or the whole of the cornea acquires the characteristics of sclera, resulting in clouding of the cornea." [HPO:probinson] |
— |
HP:0007957 |
| HPO |
HP:0002205 |
Recurrent respiratory infections |
"An increased susceptibility to respiratory infections as manifested by a history of recurrent respiratory infections." [HPO:probinson] |
— |
HP:0002719, HP:0011947 |
| HPO |
HP:0000347 |
Micrognathia |
"Developmental hypoplasia of the mandible." [HPO:probinson] |
Mandibular hypoplasia, also known as micrognathia, is a term that describes an abnormally small lower jaw. |
HP:0009118 |
| HPO |
HP:0000047 |
Hypospadias |
"Abnormal position of urethral meatus on the ventral penile shaft (underside) characterized by displacement of the urethral meatus from the tip of the glans penis to the ventral surface of the penis, scrotum, or perineum." [HPO:probinson, PMID:21968448] |
— |
HP:0100627 |
| HPO |
HP:0002162 |
Low posterior hairline |
"Hair on the neck extends more inferiorly than usual." [PMID:19125436] |
This feature is often seen in later childhood, as the neck lengthens, in an individual who was born with redundant nuchal skin, which should be assessed and coded separately. |
HP:0000464, HP:0030141 |
| HPO |
HP:0003312 |
Abnormal form of the vertebral bodies |
"Abnormal morphology of vertebral body." [] |
— |
HP:0003468 |
| HPO |
HP:0100022 |
Abnormality of movement |
"An abnormality of movement with a neurological basis characterized by changes in coordination and speed of voluntary movements." [HPO:probinson] |
Movement disorders are characterized by the phenotypic abnormalities including abnormal involuntary movements, akathisia, akinesia, athetosis, ataxia, ballismus, bradykinesia, chorea, dyskinesia, dystonia, and myoclonus tics, tremor, spasms, and stereotypy. |
HP:0012638 |
| HPO |
HP:0000368 |
Low-set, posteriorly rotated ears |
"Ears that are low-set (HP:0000369) and posteriorly rotated (HP:0000358)." [HPO:probinson] |
This bundled term is left for convenience because of its common use in the literature. It is preferable to code each feature separately. |
HP:0000358, HP:0000369 |
| HPO |
HP:0000508 |
Ptosis |
"The upper eyelid margin is positioned 3 mm or more lower than usual and covers the superior portion of the iris (objective); or, the upper lid margin obscures at least part of the pupil (subjective)." [PMID:19125427] |
— |
HP:0012373 |