Radial ray hypoplasia

Thumb hypoplasia is a spectrum of congenital abnormalities of the thumb varying from small defects to absolute retardation of the thumb. It can be isolated, when only the thumb is affected, and in 60% of the cases it is associated with radial dysplasia (or radial club, radius dysplasia, longitudinal radial deficiency). [Source: Wikipedia ]

Radial ray aplasia
Radius hypoplasia
May Be Caused by
Aase syndrome
Absent radius and anogenital anomaly
Aminopterin fetopathy
Amniotic band syndrome
Autosomal dominant congenital erythroid hypoplastic anemia and radial ray abnormality
Baller-Gerold syndrome
Brachmann-de Lange syndrome
Cat-eye syndrome
Coloboma-radial aplasia syndrome
Duane-radial ray syndrome
Facioauriculoradial dysplasia
Familial hemifacial microsomia with radial limb defect
Fanconi anemia
Fetal valproic acid exposure
Fetal varicella syndrome
Hermann syndrome
Holt-Oram syndrome
Isolated radial deficiency
Ives-Houston syndrome
IVIC syndrome
Juberg-Hayward syndrome
Klippel-Feil syndrome
Lacrimo-auriculo-dento-digital syndrome
Laurin-Sandrow syndrome
Limb/pelvis hypoplasia/aplasia-like syndrome
Mayer-Rokitansky-Küster-Hauser syndrome
Mesomelic dysplasia
Mietens-Weber syndrome
Multiple epiphyseal dysplasia
Nager acrofacial dysostosis
Oculo-auriculo-vertebral spectrum
Omphalocele-absent radial ray syndrome
Ophthalmomandibulomelic dysplasia
Pulmonary agenesis-radial ray association
Radial deficiency with lower limb deficiency
Radial hypoplasia-triphalangeal thumbs-hypospadias-maxillary diastema
Radial ray hypoplasia - choanal atresia
Radial ray hypoplasia syndrome
Radiodigitofacial dysplasia
Radioulnar synostosis and radial ray defect
Roberts syndrome
Rothmund-Thomson syndrome
Seckel syndrome
TAR syndrome
Thalidomide embryopathy
Treacher Collins syndrome
Trisomy 13
Trisomy 18
VATER association
WT limb-blood syndrome
XX male syndrome