Developmental anomalies (Graph)
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- Aberrant left subclavian artery
- Aberrant right subclavian artery
- Abnormal canalicular pattern of pancreas
- Abnormal formation of the cerebellar gyri
- Abnormal vertebral segmentation
- Abnormally aligned ribs
- Absence of humerus, bilateral, congenital
- Absence of Anterior Commissure
- Absence of Cajal-Retzius cell
- Absence of diaphragm, left
- Absence of first finger, unilateral
- Absence of first fingers, bilateral
- Absence of foot and toe(s), congenital
- Absence of hand and finger(s) (unilateral)
- Absence of hand and finger(s), congenital
- Absence of hippocampal commissure
- Absence of innominate (brachiocephalic) vein
- absence of nasal septum
- Absence of neocortex
- Absence of neuron differentiation in the basal nuclei.
- Absence of one paire the rib
- absence of peroneal bone, unilateral
- Absence of Posterior Commissure
- absence of radius, bilateral
- absence of radius, unilateral
- Absence of six tarsal bones, unilateral
- Absence of skull bones
- Absence of sternum
- Absence of the pyramid tracts, bilateral
- Absence of the Septum Pellucidum
- Acalvaria
- Acardia
- Acardiac twinning, with pump twin demise
- Acephaly
- Acro–renal–mandibular syndrome
- Acrocephaly
- Adrenal hypertrophy, fetal, bilateral
- Adrenal hypoplasia, fetal
- Agenesia of internal genital organs
- Agenesis of ribs, partial
- Aglossia
- Akinesia, fetal
- Ambiguous genitalia
- Amelia
- Amelia of the lower limbs, bilateral
- Amelia of the upper limb, unilateral
- Amelia of the upper limbs, bilateral
- Amnion nodosum
- Amyelencephaly
- Amyelia
- Anencephaly
- Anencephaly and similar conditions
- Anencephaly facies
- Aniridia
- Anomalous pulmonary veins connection to superior & inferior vena cava
- Anophtalmos
- Anophtalmos, unilateral
- Anophthalmos, bilateral
- Anorchia
- Anorchia, unilateral
- Anorectal malformation
- Anotia
- Aortic atresia
- Aortic isthmus stenosis
- Aortic valve atresia
- Aortic valve stenosis, congenital
- Aplasia cutis congenita, scalp
- Aqueduct of Sylvius atresia
- Aqueduct of Sylvius stenosis
- Arachnodactyly
- Arachnodactyly of the toes
- Arhinencephaly
- Arhinia
- Arnold-Chiari Type II malformation (CM II)
- Arthrogryposis
- Arthrogryposis,lower limbs
- Ascites, fetal
- Asphyxiating thoracic dystrophy
- Asplenia
- Atresia of foramina of Magendie and Luschka
- Atrial Hypertrophy
- Atrioventricular - channel
- Auricular dilatation
- Autosomal Recessive Polycystic Kidney Disease
- Axillary pterygia, bilateral
- Axillary pterygia,unilateral