From HPO
Homocystinuria- MedGen UID:
- 42485
- •Concept ID:
- C0019880
- •
- Disease or Syndrome
Homocystinuria is an inherited disorder in which the body is unable to process certain building blocks of proteins (amino acids) properly. \n\nThe signs and symptoms of homocystinuria typically develop during childhood, although some mildly affected people may not show signs and symptoms until adulthood.\n\nThe most common form of homocystinuria, called classic homocystinuria, is characterized by tall stature, nearsightedness (myopia), dislocation of the lens at the front of the eye, a higher risk of blood clotting disorders, and brittle bones that are prone to fracture (osteoporosis) or other skeletal abnormalities. Some affected individuals also have developmental delay and learning problems.\n\nLess common forms of homocystinuria can cause intellectual disability, slower growth and weight gain (failure to thrive), seizures, and problems with movement. They can also cause and a blood disorder called megaloblastic anemia, which occurs when a person has a low number of red blood cells (anemia), and the remaining red blood cells are larger than normal (megaloblastic).
Failure to thrive- MedGen UID:
- 746019
- •Concept ID:
- C2315100
- •
- Disease or Syndrome
Failure to thrive (FTT) refers to a child whose physical growth is substantially below the norm.
Feeding difficulties in infancy- MedGen UID:
- 436211
- •Concept ID:
- C2674608
- •
- Finding
Impaired feeding performance of an infant as manifested by difficulties such as weak and ineffective sucking, brief bursts of sucking, and falling asleep during sucking. There may be difficulties with chewing or maintaining attention.
Seizure- MedGen UID:
- 20693
- •Concept ID:
- C0036572
- •
- Sign or Symptom
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.
Cerebral atrophy- MedGen UID:
- 116012
- •Concept ID:
- C0235946
- •
- Disease or Syndrome
Atrophy (wasting, decrease in size of cells or tissue) affecting the cerebrum.
Global developmental delay- MedGen UID:
- 107838
- •Concept ID:
- C0557874
- •
- Finding
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.
Poor coordination- MedGen UID:
- 107874
- •Concept ID:
- C0563243
- •
- Finding
Gait disturbance- MedGen UID:
- 107895
- •Concept ID:
- C0575081
- •
- Finding
The term gait disturbance can refer to any disruption of the ability to walk. In general, this can refer to neurological diseases but also fractures or other sources of pain that is triggered upon walking. However, in the current context gait disturbance refers to difficulty walking on the basis of a neurological or muscular disease.
Intellectual disability- MedGen UID:
- 811461
- •Concept ID:
- C3714756
- •
- Mental or Behavioral Dysfunction
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.
Megaloblastic anemia- MedGen UID:
- 1527
- •Concept ID:
- C0002888
- •
- Disease or Syndrome
Anemia characterized by the presence of erythroblasts that are larger than normal (megaloblasts).
Hypotonia- MedGen UID:
- 10133
- •Concept ID:
- C0026827
- •
- Finding
Hypotonia is an abnormally low muscle tone (the amount of tension or resistance to movement in a muscle). Even when relaxed, muscles have a continuous and passive partial contraction which provides some resistance to passive stretching. Hypotonia thus manifests as diminished resistance to passive stretching. Hypotonia is not the same as muscle weakness, although the two conditions can co-exist.
Generalized hypotonia- MedGen UID:
- 346841
- •Concept ID:
- C1858120
- •
- Finding
Generalized muscular hypotonia (abnormally low muscle tone).
Hypomethioninemia- MedGen UID:
- 336368
- •Concept ID:
- C1848555
- •
- Finding
A decreased concentration of methionine in the blood.
Decreased methionine synthase activity- MedGen UID:
- 376395
- •Concept ID:
- C1848580
- •
- Finding
A reduction in methionine synthase activity.
Hyperhomocystinemia- MedGen UID:
- 812677
- •Concept ID:
- C3806347
- •
- Finding
An increased concentration of homocystine in the blood.
Decreased methylcobalamin- MedGen UID:
- 867371
- •Concept ID:
- C4021736
- •
- Finding
Decreased concentration of methylcobalamin. Methylcobalamin is a form of vitamin B12.
Nystagmus- MedGen UID:
- 45166
- •Concept ID:
- C0028738
- •
- Disease or Syndrome
Rhythmic, involuntary oscillations of one or both eyes related to abnormality in fixation, conjugate gaze, or vestibular mechanisms.
Blindness- MedGen UID:
- 99138
- •Concept ID:
- C0456909
- •
- Disease or Syndrome
Blindness is the condition of lacking visual perception defined as visual perception below 3/60 and/or a visual field of no greater than 10 degrees in radius around central fixation.
- Abnormality of blood and blood-forming tissues
- Abnormality of metabolism/homeostasis
- Abnormality of the digestive system
- Abnormality of the eye
- Abnormality of the genitourinary system
- Abnormality of the musculoskeletal system
- Abnormality of the nervous system
- Growth abnormality