Paeds: development Flashcards
Short Stature
definition
height > 2 standard deviations below the average for their age and sex
Short Stature
equation to predict height for boys
(mother height + fathers height + 14cm) / 2
Short Stature
equation to predict height for girls
Girls: (mothers height + father height – 14cm) / 2
Short Stature
causes
- familial short stature
- constitutional delay
- malnutrition
- chronic disease: coeliac, IBD, CHD
- edocrine: hypothyroidism
- genetic: Down’s
- skeletal dysplasias: achondoplasia
Short Stature
what is Constitutional Delay In growth and puberty
variation on normal development.
short stature in childhood. normal height in adulthood
Short Stature
key feature of Constitutional Delay In Growth and Puberty
delayed bone age
Short Stature
Constitutional Delay In Growth and Puberty dx
history + exam
supported by xray of the hand and wrist to assess bone age.
Short Stature
mnx of Constitutional Delay In Growth and Puberty
excluding other causes of a short stature and delayed puberty
reassuring parents and the child
monitoring growth over time.
Delayed Puberty
in girls, puberty starts with what
development of breast buds,
then pubic hair
and finally starting menstrual periods about 2 years from the start of puberty.
Delayed Puberty
in boys, puberty starts with what
enlargement of the testicles,
then of the penis,
gradual darkening of the scrotum,
development of pubic hair and deepening of the voice.
Delayed Puberty
what can be used to determine the pubertal stage based on examination finding of sex characteristics
tanner staging
Delayed Puberty
what is hypogonadism
lack of the sex hormones, oestrogen and testosterone, that normally rise prior to and during puberty
Delayed Puberty
what is a lack of sex hormones due to
- Hypogonadotrophic hypogonadism
- Hypergonadotrophic hypogonadism
Delayed Puberty
what is Hypogonadotropic Hypogonadism
deficiency of LH and FSH,
leading to a deficiency of the sex hormones testosterone and oestrogen
Delayed Puberty
causes of hypogonadotropic hypogonadism
- damage to hypothalamus or pituitary e.g. radiotherapy or surgery for previous cancer
- GH deficiency
- hypothyroidism
- hyperprolactinaemia
- serious chronic conditions: CF, IBD
- excessive exercise or dieting
- constitutional delay in growth and development
- Kallman syndrome
Delayed Puberty
what is Hypergonadotropic Hypogonadism
gonads fail to respond to stimulation from the gonadotrophins (LH and FSH).
Delayed Puberty
causes of hypergonadotrophic hypogonadism
- Previous damage to the gonads (e.g. testicular torsion, cancers, mumps)
- Congenital absence of the testes or ovaries
- Kleinfelter’s Syndrome (XXY)
- Turner’s Syndrome (XO)
Delayed Puberty
what is Kallman Syndrome
a genetic condition causing hypogonadotrophic hypogonadism, resulting in failure to start puberty
Delayed Puberty
what is Kallman Syndrome associated with
a reduced or absent sense of smell (anosmia)
Delayed Puberty
what is the threshold for initiating investigations
no evidence of pubertal changes in a girl aged 13 or a boy aged 14
Delayed Puberty
what initial investigations to do
look for underlying medical conditions
- FBC + ferritin
- U&E for CKD
- Anti-TTG or anti-EMA antibodies
Delayed Puberty
results of early morning LH and FSH in hypogonadotrophic hypogonadism
low
Delayed Puberty
results of early morning LH and FSH in hypergonadotrophic hypogonadism
high
Delayed Puberty
what is the screening test for GH deficiency
Insulin-like growth factor I
Developmental Delay
what is global development delay
a child displaying slow development in all developmental domains.
Developmental Delay
which diagnoses could global developmental delay indicate
- Down’s syndrome
- Fragile X syndrome
- Fetal alcohol syndrome
- Rett syndrome
- Metabolic disorders