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1 OMIM reference -
1 associated gene
21 signs/symptoms
COMMON GENES: 1
COMMON SIGNS: 7
2 OMIM references -
1 associated gene
36 signs/symptoms
Hypochondroplasia
Thanatophoric dysplasia type 2

FGFR3 FGFR3


COMMON
GENES
FGFR3



Citations in the biomedical literature:


Hypochondroplasia
FGFR3
Thanatophoric dysplasia type 2



Hypochondroplasia
Thanatophoric dysplasia type 2

Synonym(s):
(no synonyms)

Synonym(s):
- Cloverleaf skull - micromelic bone dysplasia
- TD2
- Thanatophoric dwarfism - cloverleaf skull
- Thanatophoric dwarfism type 2

Classification (Orphanet):
- Rare bone disease
- Rare developmental defect during embryogenesis
- Rare genetic disease
Classification (Orphanet):
- Rare bone disease
- Rare developmental defect during embryogenesis
- Rare genetic disease

Classification (ICD10):
- Congenital malformations, deformations and chromosomal abnormalities -
Classification (ICD10):
- Congenital malformations, deformations and chromosomal abnormalities -

Epidemiological data:
Class of prevalence: 1-9 / 100 000
Average age onset: childhood
Average age of death: normal
Type of inheritance: autosomal dominant
Epidemiological data:
Class of prevalence: unknown
Average age onset: neonatal/infancy
Average age of death: before age 5
Type of inheritance: autosomal dominant

External references:
1 OMIM reference -
No MeSH references
External references:
2 OMIM references -
No MeSH references


COMMON
SIGNS
- Autosomal dominant inheritance
- Dysostosis / chondrodysplasia / osteodysplasia / osteochondrosis / skeletal dysplasia
- Intellectual deficit / mental / psychomotor retardation / learning disability
- Macrocephaly / macrocrania / megalocephaly / megacephaly
- Metaphyseal anomaly
- Short hand / brachydactyly
- Short stature / dwarfism / nanism


Hypochondroplasia
Thanatophoric dysplasia type 2

Very frequent
- Abnormal vertebral size / shape
- Short foot / brachydactyly of toes
- Short limbs / micromelia / brachymelia

Frequent
- Elbow anomalies(excluding luxation)
- Femur anomaly / absence / agenesis / hypoplasia / bifurcation
- Genu varum
- Hyperextensible joints / articular hyperlaxity
- Pelvis anomaly / Narrow / broad iliac wings / pubis abnormality

Occasional
- Apnea / sleep apnea
- Bowed diaphysis / diaphyses / long bones
- Lordosis
- Osteoarthritis
- Rachidian / spine canal stenosis
- Scoliosis


Very frequent
- Cloverleaf skull
- Depressed nasal bridge
- Flat face
- Hypoplastic lungs / pulmonary hypoplasia / agenesis
- Hypotonia
- Loose skin / skin relaxation / excess skin / creases
- Narrow rib cage / thorax
- Platyspondyly
- Respiratory distress / dyspnea / respiratory failure / lung volume reduction
- Rhizomelic micromelia
- Short rib cage / thorax
- Stillbirth / neonatal death

Frequent
- Dilated cerebral ventricles without hydrocephaly
- Frontal bossing / prominent forehead
- Hearing loss / hypoacusia / deafness
- Increased nuchal translucency
- Kyphosis
- Polyhydramnios
- Proptosis / exophthalmos
- Seizures / epilepsy / absences / spasms / status epilepticus

Occasional
- Acanthosis nigricans
- Agyria / micro / pachy / macrogyria / lissencephaly / gyration / neuronal migration defect
- Atrial septal defect / interauricular communication
- Encephalocele / exencephaly
- Holoprosencephaly / arhinencephaly / unique lateral ventricle
- Hydrocephaly
- Patent ductus arteriosus
- Renal / kidney anomalies
- Restricted joint mobility / joint stiffness / ankylosis