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Flashcards in Congenital Deck (207)
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1

What is the male:female ratio for isolated cleft palate?

1:2

2

What is the male:female ratio for cleft lip, with or without cleft palate?

2:1

3

What is the incidence of congenital hearing loss?

???

4

What is the incidence of carcinoma arising in a thyroglossal duct cyst?

5

What percent of these require surgical intervention?

6

What are the four clinical subtypes ofWaardenburg's syndrome?

  • 1. SNHL (20%), heterochromia irides, pigment anomalies, dystopia canthorum.
  • 2. As above, without dystopia canthorum (SNHL in >so%).
  • 3• Klein-Waardenburg's syndrome: microcephaly, mental retardation, limb and skeletal abnormalities, in addition to signs of #1.
  • 4•Shah-Waardenburg's syndrome: #2 + Hirschsprung's disease

7

What are the three clinical subtypes of Usher's syndrome?

  • I-Severe-profound hearing loss, absent vestibular function, prepubertal retinitis pigmentosa.
  • II-Moderate-severe hearing loss, normal vestibular function, postpubertal retinitis pigmentosa.
  • III-Progressive hearing loss.

8

What percent of congenital hearing loses are hereditary?

>60%.

9

What is the incidence of cleft lip, with or without cleft palate, in term newborns?

1 In 1000.

10

What is the incidence of submucous cleft palate in term newborns?

1 In 1200.

11

What is the incidence of isolated cleft palate in term newborns?

1 In 2000.

12

What is the incidence of congenital aural atresia?

1:10,000-20,000.

13

What percent of children with congenital CMV have hearing loss?

10% are born with hearing loss, 10-15% eventually develop hearing loss.

14

What percent of infants with laryngomalacia require surgical treatment?

10%.

15

What percent of cases of choanal atresia involve only a mucosal diaphragm or membrane?

10%.

16

What are the typical inheritance patterns of nonsyndromic hearing loss?

10-20% AD, 75% autosomal recessive (AR), 2-3% X-linked,

17

What percent of infants have a hemangioma by age 1?

12%.

18

What percent of gliomas have a fibrous tract connecting to the subarachnoid space?

15%.

19

What is the incidence of synchronous airway lesions in children with laryngomalacia?

18-20%.

20

What is the incidence ofWaardenburg's syndrome?

1in 4,000 births.

21

Birth trauma accounts for what percent of vocal cord paralysis in children?

20% (associated with forceps use and C-section).

22

What percent of cases of congenital vocal cord paralysis are bilateral?

20%.

23

What is the recovery rate for idiopathic vocal cord paralysis in children?

20%.

24

What percent of Thyroglossal duct cyst contains thyroid tissue?

20%.

25

What percent of preauricular pits are bilateral?

20%.

26

What percent of teratomas become malignant?

20%.

27

What is the incidence of hemangiomas in premature infants weighing less than 1000 g?

23%.

28

What is the incidence of facial nerve displacement in congenital aural atresia?

25-30%.

29

What percent of sporadic cases of congenital hearing loss are caused by mutation of the DFNB1 gene on chromosome 13, encoding for Connexin-26?

27%.

30

What percent of congenital cholesteatomas are bilateral?

3%.