Etiology (Prevalence)

Count

No Determination of Etiology

1711

OTHER: Hereditary Syndrome/Disorders

1335

Complication of Prematurity

1224

CHARGE association

735

OTHER: Pre-Natal/Congenital Complications

543

OTHER: Post-Natal/Non-Congenital

397

Cytomegalovirus (CMV)

332

Microcephaly

331

Asphyxia

282

Hydrocephaly

278

Meningitis

248

Down syndrome (Trisomy 21 syndrome)

241

Severe Head Injury

211

Usher I syndrome

190

Congenital Rubella

115

Stickler syndrome

108

Maternal Drug Use

104

Goldenhar syndrome

96

Encephalitis

95

Dandy Walker syndrome

87

Tumors

80

Usher II syndrome

78

Cornelia de Lange

75

Stroke

69

Trisomy 13 (Trisomy 13-15, Patau syndrome)

62

Wolf-Hirschhorn syndrome (Trisomy 4p)

59

Leber congenital amaurosis

49

Pierre-Robin syndrome

42

Fetal Alcohol syndrome

39

Infections

37

Norrie disease

34

Aicardi syndrome

30

Moebius syndrome

29

Alstrom syndrome

28

Refsum syndrome

28

Chromosome 18, Ring 18

26

Trisomy 18 (Edwards syndrome)

26

Congenital Toxoplasmosis

25

Treacher Collins syndrome

22

Chemically Induced

20

Batten disease

17

Waardenburg syndrome

17

Cockayne syndrome

16

Crouzon syndrome (Craniofacial Dysotosis)

16

Cri du chat syndrome (Chromosome 5p- synd)

15

Marshall syndrome

14

Turner syndrome

14

Hurler syndrome (MPS I-H)

13

NF1 - Neurofibromatosis (von Recklinghausen dis)

13

Pfieffer syndrome

13

Apert syndrome/Acrocephalosyndactyly, Type 1

12

Direct Trauma to the eye and/or ear

12

Bardet-Biedl syndrome (Laurence Moon-Biedl)

10

Sturge-Weber syndrome

9

Usher III syndrome

9

Kniest Dysplasia

8

Neonatal Herpes Simplex (HSV)

8

NF2 - Bilateral Acoustic Neurofibromatosis

8

Alport syndrome

7

Congenital Syphilis

7

Hunter Syndrome (MPS II)

7

Leigh Disease

7

Prader-Willi

7

Smith-Lemli-Opitz (SLO) syndrome

7

Hallgren syndrome

5

Marfan syndrome

5

Klippel-Feil sequence

4

Maroteaux-Lamy syndrome (MPS VI)

4

Cogan Syndrome

3

Herpes-Zoster (or Hunt)

3

Kearns-Sayre syndrome

3

Hand-Schuller-Christian (Histiocytosis X)

2

Klippel-Trenaunay-Weber syndrome

2

Monosomy 10p

2

Optico-Cochleo-Dentate Degeneration

2

Scheie syndrome (MPS I-S)

2

Crigler-Najjar syndrome

1

Morquio syndrome (MPS IV-B)

1

Wildervanck syndrome

1

Grand Total

9827