| 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:0009928 |
Thick nasal alae |
"Increase in bulk of the ala nasi." [PMID:19152422] |
— |
HP:0000429 |
| HPO |
HP:0040075 |
Hypopituitarism |
— |
— |
HP:0011747 |
| HPO |
HP:0040326 |
Hypoplasia of the olfactory bulb |
"Underdevelopment of the olfactory bulb." [HPO:skoehler] |
— |
HP:0002977, HP:0040327 |
| HPO |
HP:0000316 |
Hypertelorism |
"Interpupillary distance more than 2 SD above the mean (alternatively, the appearance of an increased interpupillary distance or widely spaced eyes)." [PMID:19125427] |
— |
HP:0100886 |
| HPO |
HP:0001249 |
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." [HPO:probinson] |
This term should be used for children at least five years old. For younger children, consider the term Global developmental delay (HP:0001263). |
HP:0011446, HP:0012759 |
| HPO |
HP:0000456 |
Bifid nasal tip |
"A splitting of the nasal tip. Visually assessable vertical indentation, cleft, or depression of the nasal tip." [HPO:sdoelken, PMID:19152422] |
This is a rare congenital deformity due to failure of the paired nasal processes to fuse to a single midline organ during early gestation. |
HP:0000436 |
| HPO |
HP:0002119 |
Ventriculomegaly |
"An increase in size of the ventricular system of the brain." [HPO:probinson] |
— |
HP:0002118 |
| HPO |
HP:0001841 |
Preaxial foot polydactyly |
"Duplication of all or part of the first ray." [HPO:probinson, PMID:19125433] |
This term applies for a wide variety of partial and/or complete duplications of the phalanges of the big toe (sometimes including the 1st metatarsal). A partial duplication can present itself on x-rays as a notched phalanx, bifid phalanx or a broadened phalanx. Polydactyly affecting the big toe is called preaxial or hallucal polydactyly of the feet. |
HP:0001829, HP:0001844, HP:0100258 |
| HPO |
HP:0000455 |
Broad nasal tip |
"Increase in width of the nasal tip." [HPO:probinson, PMID:19152422] |
Nasal tip width is assessed at the anterior junction of the alae and the tip. This is easier in persons with a somewhat squared shape of the nasal tip. This may be best viewed from the inferior aspect of the nose. No objective measures are available. See Bulbous nose for a related term. |
HP:0000436, HP:0000463 |
| HPO |
HP:0000506 |
Telecanthus |
"Distance between the inner canthi more than two standard deviations above the mean (objective); or, apparently increased distance between the inner canthi." [HPO:probinson] |
Dystopia canthorum (also called telecanthus) describes a subtle but unusual facial feature in which the inner corners of the eyes (canthi) are spaced farther apart than normal, yet the eyes (pupils) themselves are not necessarily widely spaced. |
HP:0000492 |
| HPO |
HP:0000545 |
Myopia |
"An abnormality of refraction characterized by the ability to see objects nearby clearly, while objects in the distance appear blurry." [HPO:probinson] |
— |
HP:0000539 |
| HPO |
HP:0001263 |
Global developmental delay |
"A delay in the achievement of motor or mental milestones in the domains of development of a child, including motor skills, speech and language, cognitive skills, and social and emotional skills. This term should only be used to describe children younger than five years of age." [DDD:hvfirth, HPO:sdoelken] |
Developmental retardation is any significant lag in development in the any or all of the physical, cognitive, behavioral, emotional, or social spheres. Note that the term intellectual disability (mental retardation) refers to not merely a delay in development but rather a permanent limitation. Note that the term 'psychomotor retardation' is also used in some contexts to refer to a slowing of thought and physical movements as a result of major depression or intoxication. |
HP:0012758 |
| HPO |
HP:0006866 |
Midline central nervous system lipomas |
— |
— |
HP:0100251 |
| HPO |
HP:0000501 |
Glaucoma |
"Glaucoma refers loss of retinal ganglion cells in a characteristic pattern of optic neuropathy usually associated with increased intraocular pressure." [HPO:probinson, PMID:11815354] |
The feature that differentiates glaucoma from other causes of visual morbidity is a characteristic pattern of damage to the optic nerve head. This is most easily recognised at the superior and inferior poles of the optic disc. The vertical cup:disc ratio (VCDR) has proved to be a simple, relatively robust index of glaucomatous loss of the neuroretinal rim. As with intraocular pressure, VCDR is a continuous variable within the population. |
HP:0012373 |
| HPO |
HP:0006951 |
Retrocerebellar cyst |
— |
— |
HP:0002350 |
| HPO |
HP:0002781 |
Upper airway obstruction |
"Increased resistance to the passage of air in the upper airway." [HPO:probinson] |
— |
HP:0006536 |
| HPO |
HP:0000028 |
Cryptorchidism |
"Testis in inguinal canal. That is, absence of one or both testes from the scrotum owing to failure of the testis or testes to descend through the inguinal canal to the scrotum." [HPO:probinson, PMID:23650202] |
The gonad is mobile and can be retracted superiorly by the cremaster muscle reflex stimulated, for instance, by cold or touch. A retracted testis is not cryptorchidism. An abdominal testis cannot be distinguished by physical examination from an (Apparently) absent testis and requires radiological (or, rarely, surgical) procedures for assessment. |
HP:0000035 |
| HPO |
HP:0000239 |
Large fontanelles |
"In newborns, the two frontal bones, two parietal bones, and one occipital bone are joined by fibrous sutures, which form a small posterior fontanelle, and a larger, diamond-shaped anterior fontanelle. These regions allow for the skull to pass the birth canal and for later growth. The fontanelles gradually ossify, whereby the posterior fontanelle usually closes by eight weeks and the anterior fontanelle by the 9th to 16th month of age. Large fontanelles are diagnosed if the fontanelles are larger than age-dependent norms." [HPO:probinson] |
There are six membrane-covered openings between the cranial sutures in the incompletely ossified skull of the fetus or newborn infant that normally close sometime after birth (anterior fontanel, cranial fontanel, mastoid fontanel, posterior fontanel, sphenoidal fontanel). |
HP:0011328 |
| HPO |
HP:0003065 |
Patellar hypoplasia |
"Underdevelopment of the patella." [HPO:curators] |
— |
HP:0006498 |
| HPO |
HP:0001274 |
Agenesis of corpus callosum |
"Absence of the corpus callosum as a result of the failure of the corpus callosum to develop, which can be the result of a failure in any one of the multiple steps of callosal development including cellular proliferation and migration, axonal growth or glial patterning at the midline." [HPO:curators] |
— |
HP:0007370 |
| HPO |
HP:0001762 |
Talipes equinovarus |
"Talipes equinovarus (also called clubfoot) typically has four main components: inversion and adduction of the forefoot; inversion of the heel and hindfoot; equinus (limitation of extension) of the ankle and subtalar joint; and internal rotation of the leg." [HPO:probinson, PMID:32491773] |
Clubfoot is a complex, multifactorial deformity with genetic and intrauterine factors. One popular theory postulates that a clubfoot is a result of intrauterine maldevelopment of the talus that leads to adduction and plantarflexion of the foot. On radiographic projection a clubfoot can be noted as parallel axes of talus and calcaneus. |
HP:0001883 |
| HPO |
HP:0000161 |
Median cleft lip |
"A type of cleft lip presenting as a midline (median) gap in the upper lip." [HPO:probinson] |
— |
HP:0000204 |
| HPO |
HP:0000248 |
Brachycephaly |
"An abnormality of skull shape characterized by a decreased anterior-posterior diameter. That is, a cephalic index greater than 81%. Alternatively, an apparently shortened anteroposterior dimension (length) of the head compared to width." [HPO:probinson, PMID:19125436] |
Cephalic index is the ratio of head width expressed as a percentage of head length. The normal range is 76-80.9%. Head length is measured between the glabella (the most prominent point on the frontal bone above the root of the nose) and the most prominent part of the occiput in the midline, using spreading calipers. Head width is measured between the most lateral points of the parietal bones on each side of the head, using spreading calipers. Cephalic index standards are derived from Caucasians and have limited relevance for other races and ethnicities. Current norms also have limited validity because of changes in infant sleeping position and consequent changes in head shape. New data should be developed. Brachycephaly is distinct from Flat occiput, but both can be present in the same individual and should be coded separately. |
HP:0002648 |
| HPO |
HP:0002190 |
Choroid plexus cyst |
"A cyst occurring within the choroid plexus within a cerebral ventricle." [HPO:probinson] |
Choroid plexus cysts can be observed on prenatal ultrasound examinations and are associated with a weakly increased risk for fetal chromosome abnormalities such as trisomy 18. |
HP:0007376 |