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Growth
Surendra K. Varma, M.D.
University Distinguished Professor
and Vice-Chairman of Pediatrics
Professor of Physiology and
Health Organization Management
Residency Program Director
Department of Pediatrics
Powerpoint
Powerpoint
Powerpoint
Powerpoint
Assessment of Growth

Questions to Ask Parents
Is the child one of the shortest members of the class?
Is the child wearing last years clothes?
Is the child growing less than 2 inches per year?
Has the child complained about his or her height?
Is the child unable to keep up with others of the same age at
play?
Does the child show signs of early sexual development?
(Before 8 years in girls and before 9 years in boys)

Does a 13-year-old girl or 15-year-old boy fail to show sings of
puberty?
Assessment of Suspected Growth Abnormalities

INITIAL DIAGNOSTIC APPROACH
Considerations

Pregnancy history
Intrauterine growth retardation (IUGR)
Asphyxia or other birth trauma
Toxins (eg. Alcohol, drugs, cigarettes, etc)

General history
Chronic illness or debilitating disease
Psychosocial assessment

Growth history
 Height and weight charted
(if available, growth velocity)

Family history
Parental stature
Midparental height
Parental pubertal patterns
Assessment of Suspected Growth Abnormalities

AUXOLOGIC DATA
Abnormally slow growth rate
Ages 3 to 12 years: Less than 2 inches/year (5 cm/year)

Downwardly crossing centile channels on growth chart after
the age of 18 months
Height below third percentile (-2 SD)
Height significantly below genetic potential
(-2 SD below midparental height)
Growth and Growth Disorders

Calculating Target Heights
Midparental Height:
Girls

Boys

(F + M)  13 cm
2
(F + M)  13 cm
2

F = fathers height (cm)
M = mothers height (cm)
Target Height = Midparental Height + 1.88 SD
(1 SD  5cm)
Assessment of Suspected Growth Abnormalities

Physical Examination
Height and weight accurately measured and plotted
Head circumference recorded
Body proportions assessed
Upper:lower segment ratio
Pubertal status
Syndrome-associated features
Assessment of Growth

Common Errors at Time of Measurement
Failing to record data
Using inappropriate growth chart
Transposing height and weight
Failing to plot at closest month/year of age
Omitting of measurements
Assessment of Growth

Monitoring Growth
Obtain accurate measurements at regular intervals
Plot correctly on appropriate growth chart
Determine need for further evaluation
Give equal attention to both sexes
Growth and Growth Disorders

Diagnostic Workup
Initial Screening Tests
 Complete blood cell count (CBC)
 Erythrocyte sedimentation rate (ESR)
 Blood chemistries, including electrolytes
Thyroid profile (L-thyroxine [T4] and thyrotropin
[TSH])
 Kidney profile (urinalysis [UA], blood urea nitrogen
[BUN], creatinine)
 Bone age (BA)
Assessment of Suspected Growth Abnormalities

Bone Age and Growth Potential

Male, 8 years

Male, 14 years
Growth and Growth Disorders

Diagnostic Workup (cont.)
Specialized Tests
Chromosomal analysis (karyotype)
IGF-1 and IGFBP-3
Magnetic resonance imaging (MRI) or computed
tomography (CT) studies of the brain
PITUITARY HORMONES
ANTERIOR
ACTH
LH
FSH
TSH
HGH
PROLACTIN
MSH
PITUITARY HORMONES
POSTERIOR
OXYTOCIN
VASOPRESSIN (ADH)
Differential Diagnosis of Growth Abnormalities

Assessment of Growth Hormone Secretion
Provocative stimuli
Arginine-insulin
Clonidine
L-dopa + propranolol
Glucagon
Others

Physiologic tests
Exercise-stimulated
Serial sampling
Growth and Growth Disorders

Endocrine Causes of Short Stature
Hypothyroidism
Hypopituitarism
Glucocorticoid excess
GH insensitivity (Laron syndrome)
Early exposure to sex steroids
Precocious puberty
Poorly controlled diabetes mellitus
Powerpoint
Powerpoint
Growth Hormone Therapy

Historical Perspective
Human growth hormone (hGH)
First available in the 1960s
Limited supplies from cadavers
Possible viral contamination
Powerpoint
Powerpoint
Powerpoint
Powerpoint
Powerpoint
Powerpoint
Powerpoint
Powerpoint
Growth and Growth Disorders

History of Growth Hormone Therapy for Short Stature
From 1950s to 1985, the only treatment available for short
stature was cadaveric pituitary hGH
Creutzfeldt-Jakob disease (CJD) reported with cadaveric
pituitary hGH
In 1985, 4 US cases identified
From 1985 to 1993, 45 cases reported worldwide
In 1993, use of cadaveric pituitary hGH banned worldwide

In 1985, first GH product, Protropin (somatrem for injection)
became available
Growth Hormone Therapy

Current Perspective
Biosynthetic growth hormone
 Large-scale production made possible by recombinant
DNA technology
 Highly purified product
 Supplies sufficient to treat all GH-inadequate children
 Uninterrupted treatment
 Precludes contamination
Differential Diagnosis of Growth Abnormalities

Growth Hormone Deficiency
Other systemic causes of short stature ruled out
After 3 years of age, subnormal growth rate usually less
than 2 inches/year (5 cm/year)
Height progressively declining to a lower percentile
Delayed bone age
Poor or low response to stimulation testing
Growth Hormone Therapy

Candidates for GH Therapy
GH inadequacy
 Demonstrated GH inadequacy with at least 2 stimulation
tests
 Subnormal growth velocity for age
 Bone age film indicates growth potential remaining
 All other etiologies ruled out
Growth Hormone Therapy

Treatment of GH Inadequacy
Initiate treatment as early as possible
Treatment by subcutaneous injections 3 to 7 times per
week
Avoid therapeutic vacations
Pretreatment growth rate of 3 to 4 cm/year accelerates to
8 to 10 cm/year during the first year
Treatment continues until satisfactory height achieved or
epiphyseal fusion occurs
Powerpoint
Powerpoint
Powerpoint
Powerpoint
Powerpoint
Powerpoint
Powerpoint
Powerpoint
Powerpoint
Powerpoint
Powerpoint
Potential Application of GH Therapy

Role of Growth Hormone Therapy in the Treatment of:

Turner syndrome
Chronic renal insufficiency
Idiopathic short stature
Powerpoint
Potential Applications of GJ Therapy

Therapeutic Comparison of Results in Turner Girls

Current heights of Turner girls after
3-5 years of treatment with hGH

Current heights of Turner girls after 35 years of combined therapy with hGH
and oxandrolone.
Powerpoint
Powerpoint
Powerpoint
Powerpoint
Powerpoint
Powerpoint
Powerpoint
Powerpoint
Powerpoint
Powerpoint
Powerpoint
Powerpoint
Growth and Growth Disorders

Non-endocrine Systemic Disorders Affecting Growth
Respiratory disease
Asthma
Cystic fibrosis
Renal disease
Hypoplastic kidneys
Renal tubular acidosis
Chronic renal insufficiency
Hematologic disease
Chronic anemias
Growth and Growth Disorders

Non-endocrine Systemic Disorders Affecting Growth
Gastrointestinal disorders
Inflammatory bowel disease
Chronic liver disease
Celiac disease
Cystic fibrosis
Other malabsorption diseases
Malnutrition
Diabetes mellitus
Cardiac diseases
Powerpoint
Powerpoint
Powerpoint
Powerpoint
Powerpoint
Powerpoint
Powerpoint
Powerpoint
Powerpoint
Powerpoint

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Powerpoint

  • 1. Growth Surendra K. Varma, M.D. University Distinguished Professor and Vice-Chairman of Pediatrics Professor of Physiology and Health Organization Management Residency Program Director Department of Pediatrics
  • 6. Assessment of Growth Questions to Ask Parents Is the child one of the shortest members of the class? Is the child wearing last years clothes? Is the child growing less than 2 inches per year? Has the child complained about his or her height? Is the child unable to keep up with others of the same age at play? Does the child show signs of early sexual development? (Before 8 years in girls and before 9 years in boys) Does a 13-year-old girl or 15-year-old boy fail to show sings of puberty?
  • 7. Assessment of Suspected Growth Abnormalities INITIAL DIAGNOSTIC APPROACH Considerations Pregnancy history Intrauterine growth retardation (IUGR) Asphyxia or other birth trauma Toxins (eg. Alcohol, drugs, cigarettes, etc) General history Chronic illness or debilitating disease Psychosocial assessment Growth history Height and weight charted (if available, growth velocity) Family history Parental stature Midparental height Parental pubertal patterns
  • 8. Assessment of Suspected Growth Abnormalities AUXOLOGIC DATA Abnormally slow growth rate Ages 3 to 12 years: Less than 2 inches/year (5 cm/year) Downwardly crossing centile channels on growth chart after the age of 18 months Height below third percentile (-2 SD) Height significantly below genetic potential (-2 SD below midparental height)
  • 9. Growth and Growth Disorders Calculating Target Heights Midparental Height: Girls Boys (F + M) 13 cm 2 (F + M) 13 cm 2 F = fathers height (cm) M = mothers height (cm) Target Height = Midparental Height + 1.88 SD (1 SD 5cm)
  • 10. Assessment of Suspected Growth Abnormalities Physical Examination Height and weight accurately measured and plotted Head circumference recorded Body proportions assessed Upper:lower segment ratio Pubertal status Syndrome-associated features
  • 11. Assessment of Growth Common Errors at Time of Measurement Failing to record data Using inappropriate growth chart Transposing height and weight Failing to plot at closest month/year of age Omitting of measurements
  • 12. Assessment of Growth Monitoring Growth Obtain accurate measurements at regular intervals Plot correctly on appropriate growth chart Determine need for further evaluation Give equal attention to both sexes
  • 13. Growth and Growth Disorders Diagnostic Workup Initial Screening Tests Complete blood cell count (CBC) Erythrocyte sedimentation rate (ESR) Blood chemistries, including electrolytes Thyroid profile (L-thyroxine [T4] and thyrotropin [TSH]) Kidney profile (urinalysis [UA], blood urea nitrogen [BUN], creatinine) Bone age (BA)
  • 14. Assessment of Suspected Growth Abnormalities Bone Age and Growth Potential Male, 8 years Male, 14 years
  • 15. Growth and Growth Disorders Diagnostic Workup (cont.) Specialized Tests Chromosomal analysis (karyotype) IGF-1 and IGFBP-3 Magnetic resonance imaging (MRI) or computed tomography (CT) studies of the brain
  • 18. Differential Diagnosis of Growth Abnormalities Assessment of Growth Hormone Secretion Provocative stimuli Arginine-insulin Clonidine L-dopa + propranolol Glucagon Others Physiologic tests Exercise-stimulated Serial sampling
  • 19. Growth and Growth Disorders Endocrine Causes of Short Stature Hypothyroidism Hypopituitarism Glucocorticoid excess GH insensitivity (Laron syndrome) Early exposure to sex steroids Precocious puberty Poorly controlled diabetes mellitus
  • 22. Growth Hormone Therapy Historical Perspective Human growth hormone (hGH) First available in the 1960s Limited supplies from cadavers Possible viral contamination
  • 31. Growth and Growth Disorders History of Growth Hormone Therapy for Short Stature From 1950s to 1985, the only treatment available for short stature was cadaveric pituitary hGH Creutzfeldt-Jakob disease (CJD) reported with cadaveric pituitary hGH In 1985, 4 US cases identified From 1985 to 1993, 45 cases reported worldwide In 1993, use of cadaveric pituitary hGH banned worldwide In 1985, first GH product, Protropin (somatrem for injection) became available
  • 32. Growth Hormone Therapy Current Perspective Biosynthetic growth hormone Large-scale production made possible by recombinant DNA technology Highly purified product Supplies sufficient to treat all GH-inadequate children Uninterrupted treatment Precludes contamination
  • 33. Differential Diagnosis of Growth Abnormalities Growth Hormone Deficiency Other systemic causes of short stature ruled out After 3 years of age, subnormal growth rate usually less than 2 inches/year (5 cm/year) Height progressively declining to a lower percentile Delayed bone age Poor or low response to stimulation testing
  • 34. Growth Hormone Therapy Candidates for GH Therapy GH inadequacy Demonstrated GH inadequacy with at least 2 stimulation tests Subnormal growth velocity for age Bone age film indicates growth potential remaining All other etiologies ruled out
  • 35. Growth Hormone Therapy Treatment of GH Inadequacy Initiate treatment as early as possible Treatment by subcutaneous injections 3 to 7 times per week Avoid therapeutic vacations Pretreatment growth rate of 3 to 4 cm/year accelerates to 8 to 10 cm/year during the first year Treatment continues until satisfactory height achieved or epiphyseal fusion occurs
  • 47. Potential Application of GH Therapy Role of Growth Hormone Therapy in the Treatment of: Turner syndrome Chronic renal insufficiency Idiopathic short stature
  • 49. Potential Applications of GJ Therapy Therapeutic Comparison of Results in Turner Girls Current heights of Turner girls after 3-5 years of treatment with hGH Current heights of Turner girls after 35 years of combined therapy with hGH and oxandrolone.
  • 62. Growth and Growth Disorders Non-endocrine Systemic Disorders Affecting Growth Respiratory disease Asthma Cystic fibrosis Renal disease Hypoplastic kidneys Renal tubular acidosis Chronic renal insufficiency Hematologic disease Chronic anemias
  • 63. Growth and Growth Disorders Non-endocrine Systemic Disorders Affecting Growth Gastrointestinal disorders Inflammatory bowel disease Chronic liver disease Celiac disease Cystic fibrosis Other malabsorption diseases Malnutrition Diabetes mellitus Cardiac diseases