Top Quality Call Girl Service Kalyanpur 6378878445 Available Call Girls Any Time
Â
Kimia klinik referat 1
1. Adrenal Disorders in
Childhood & Adolescence
A N Gorsuch MA DM FRCP
Consultant Endocrinologist
KSS Deanery PLEAT Day, Conquest Hospital
8 July 2011
2. Adrenal Disorders
Scope of this session
Congenital adrenal hyperplasia (CAH)
illustrated by a case followed through 43 years
â
â
â
â
â
steroid biochemistry
pathology
clinical features
investigations
management
Addisonâs disease
23. Classical CAH 21-hydroxylase deficiency
Incidence & effects
Incidence ~ 1 in 14 000 live births
higher in some populations
⢠Ashkenazy Jewish
⢠âCelticâ
75%: salt-wasting adrenocortical insuff at ~7-10 days
Other effects
Female
â ambiguous external genitalia
â internal (mĂźllerian) organs usually normal
â hirsutism, delayed menarche, subfertility, polycystic ovaries
Male
â genitalia usually normal
â precocious âpubarcheâ (adrenarche)
â testicular adrenal rests, usually benign
24. Ambiguous genitalia:
diagnosis â 1
Examination
â identify urethral meatus
â gonads
Blood biochemistry (NOT in first 24h; special reference ranges in prematurity)
â U&E
â at least, random 17-hydroxyprogesterone (17-OHP) . Result >100 nmol/l
diagnostic. False âve possible if mother on glucocorticoid treatment.
â ideally, also cortisol, 11-deoxycortisol, 17-OH-pregnenolone,
androstenedione, maybe deoxycorticosterone & dehydroepiandrosterone
â borderline results: repeat pre- and 1-hr-post synacthen 250mcg
â (plasma renin activity / aldosterone not helpful â overlap with normal)
Rapid karyotype
Genotyping identifies ~95% of mutations
USS pelvis
Urinary steroid profile important in past, still useful in some cases
25. Ambiguous genitalia:
diagnosis â 2
Gonads
palbable?
Uterus
on USS?
N
Y
Uterus
on USS?
N
XY male
pseudohermaphrodite
17-OHP
high?
Y
N
N
Karyotype
Y
XX
X/XY
X/XXY
Mixed
gonadal
dysgenesis
Y
XX Female
CAH
XY
XX/XY
True
hermaphrodite
Female
pseudohermaphrodite
Assign the babyâs sex only when diagnostic information is available
(multidisciplinary team, with parents)
White PC. Congenital Adrenal Hyperplasias. Best Prac Res Clin Endocrinol Metab 2001; 15(1): 17-41
26. Neonatal diagnosis of CAH
Ambiguous genitalia â see previous slides
Adrenal crisis (mainly in male babies at 7-10 days)
â biochemistry / genotyping as above
Neonatal screening â âGuthrieâ cards for 17-OHP
Not currently offered in UK
under review â report expected March 20121
Standard in USA since 2008, also in NZ etc
+ve in ~0.5% of all tests, specificity only 2%
â normal result after mult antenatal glucocorticoid Rx: repeat after 2 wks
â borderline result: repeat, or genetic testing
â high result: U&E and 17-OHP etc on fresh blood
1 http://www.screening.nhs.uk/policydb.php?policy_id=65 accessed 4/7/11
27. Management of CAH
Glucocorticoid replacement / androgen suppression
â
â
â
â
â
children: hydrocortisone 10-20mg/m2 per day, divided doses
adults: usually dexametasone
larger dose at bed-time to suppress ACTH
beware over-replacement
monitor
17-Îą-progesterone and androstenedione (?testosterone, cortisol, ACTH etc)
growth, bone age, BP, U&E, skin; osteoporosis scans in adults
Correction of salt-wasting
â 9-a-fludrocortisone 100-400mcg/day (long-acting)
â plus sodium chloride supplements until able to select saltier foods
â monitor BP, U&E, oedema (?renin)
Corrective surgery to genitalia
Genetic counselling & psychological support
28. Case 1 â neonatal period 1968
(continued)
Initial (?timing) urinary steroid profile ânormalâ
Aged 9 days: vomiting, hypotensive, Na+â, K+â
Repeat steroid profile
abnormal: CAH (21-hydroxylase deficiency)
IV resuscitation
Rx glucocorticoid and mineralocorticoid
29. Case 1: Infancy
Steroid replacement
â
â
â
â
various regimens tried
poor growth, hypertensive
crises when tried without mineralocorticoid
finally settled on
hydrocortisone 5mg tds
fludrocortisone 50mcg bd
Corrective surgery aged 2yr 9 mth
â partial clitoridectomy (preserving glans) & vaginoplasty
library photos Š Endopics
30. Case 1: Childhood to mid-teens
â˘
â˘
â˘
â˘
â˘
â˘
â˘
on hydrocortisone 10/5/10 mg + fludro 100/50 mcg
satisfactory growth up 10th centile from age 9
menarche at 13
ht 1.545m wt 52.0kg BMI 21.8 at age 15
lively, âa tomboyâ
gynae review: âtidying upâ suggested when fully mature
moved to Hastings from Surrey 1983
31. Case 1: Aged 20
⢠androgens not fully suppressed
even on hydrocortisone totalling 40mg/day
⢠transferred to dexametasone 500mcg bd
androgens then well controlled
⢠fludrocortisone 200 mcg daily
⢠gynae opinion
â menstruating normally so internal organs functioning
â full examination not possible
â consider EUA & laparoscopy in due course
32. Case 1: Aged 21 (1989)
â˘
â˘
â˘
â˘
17-hydroxyprogesterone & androstenedione normal
BP 130/90, K+ 3.9, dermal atrophy, weight up
dexametasone 500mcg reduced from bd to od
fludrocortisone reduced from 200 to 150mcg daily
â BP then 110/70, andro & 17-OHP well controlled, weight down
⢠thinking of getting married at some time in the future
â considering OCP & referral back to gynaecologist
â soon afterwards âŚ
33. Case 1: Pregnancy
Aged 21 â 1st pregnancy 1989-90
â tired: dexametasone* increased to 250/500mcg
then developed purple striae so reduced to 250mcg bd
â
â
â
â
Na+ <140: fludrocortisone increased to 100mcg x12 /wk div
androgens remained well suppressed
ELCS at 39/40, glucocorticoid cover
baby normal & well
pre-discharge 17-OHP sample lost; 10-day 17-OHP normal.
Age 26: 2nd pregnancy 1994-5
â similar, but dexametasone* 250/500mcg needed to control
androgens, ?leading to excess weight-gain
â baby normal
â reduced weight subsequently on Dex 250mcg on
* hydrocortisone or prednisolone now recommended in pregnancy
34. CAH and Pregnancy
⢠Pregnancy in a woman with CAH
1999: the placenta blocks androgens, prednisolone &
hydrocortisone, but passes dexametasone
â reassure that CAH unlikely to affect baby
unless parents related or Ashkenazy Jews etc
â preferably use hydrocortisone tds or prednisolone
â continue fludrocortisone
â monitor as in non-pregnant state; doses may need adjusting
⢠Prenatal diagnosis & treatment where fetus at risk
â amniocyte/chorionic villus genetic analysis
â amniotic fluid 17-OHP has been used
â dexamethasone to mother (crosses placenta)
35. Case 1: Current status
Age 42 (2010)
â
â
â
â
â
â
Well
on dexametasone 250mcg on
fludrocortisone recently increased to 200mcg as renin up
17OHP, Andro, DHEA, ACTH, Testo, renin all normal
clinic BP up, awaiting monitoring
Mirena coil.
37. 21-hydroxylase deficiency:
non-classical
Incidence ~ 1 in 500
â higher in some populations
⢠Askenazy Jews
⢠âcelticâ
Not salt-wasting or glucocorticoid-deficient
Neonatal genitalia normal or mild clitoromegaly
Often presents in adolescent/adult female with hirsutism etc
Precocious virilisation in some males
42. 11β-hydroxylase deficiency
Commonest CAH after 21-hydroxylase deficiency
but still <1 in 100 000 live births
Virilising but not salt-wasting at presentation
Hypertension
May become salt-wasting with glucocorticoid treatment
43. Rare forms of CAH
3β-hydroxysteroid dehydrogenase deficiency
17Îą-hydroxylase deficiency (hypertensive)
20,22 desmolase deficiency
StAR mutations - âlipoid CAHâ
Incidence < 1 in 100 000
Genitalia in neonate (no sex hormones)
â in female: female
â in male: ambiguous, or female without uterus etc
Adrenocortical insufficiency
Salt-wasting, except in 17Îą-hydroxylase deficiency
44. Last slide on CAH
Any questions?
References
⢠White PC. Congenital Adrenal Hyperplasias. Best Prac Res Clin Endocrinol Metab 2001; 15(1): 17-41
⢠UpToDate
46. Addisonâs disease
Scope of this session
â˘
â˘
â˘
â˘
â˘
â˘
Definition & History
Pathology
Clinical features
Investigations
Long-term replacement therapy
Management of addisonian crisis
47. Definition & History
Chronic primary adrenocortical insufficiency
Described by Thomas Addison (1795-1860)1
â from Newcastle & Cumberland
â MD (Edin) 1815
â on staff of Guyâs Hospital.
1Addison
T, âOn the Constitutional and Local Effects of Disease of the Suprarenal Capsulesâ, 1855.
50. Aetiology now
Frequency
England 1987-93 1
Organ-specific autoimmunity
93%
Metastatic malignancy
2%
Adrenoleukodystrophy
3%
X-linked recessive, consider in boys under 15
Tuberculosis
1
0%
Kong M-F & Jeffcoate W. Eighty-six cases of Addison's disease.Clin Endocrinol 1994; 41:757-761
51. Polyendocrine AI disease
Primary hypothyroidism
Type 1 diabetes
Gravesâ
Premature ovarian failure
Hypoparathyroidism
Pernicious anaemia
25%
10%
11%
13% of women
4%
1%
Kong M-F & Jeffcoate W. Eighty-six cases of Addison's disease.Clin Endocrinol 1994; 41:757-761
52. Presentation & clinical features
Usually present: insidious âŚ
â
â
â
â
â
Anorexia, nausea, weight-loss
Fatigue, weakness, lethargy
Postural dizziness & hypotension
Pigmentation
Recurrent hypoglycaemia / falling insulin requirement in DM
May occur
â
â
â
â
â
â
â
â
â
â
Nocturia
Abdominal pain, dyspepsia, back pain
Vitiligo
Supine hypotension
Diarrhoea
Loss of body hair
Erectile failure or amenorrhoea
Mental disturbances
Addisonian crisis: vomiting, dehydration, hypoglycaemia, shock.
Death.
58. Investigations I
Serum cortisol (09:00)
⢠Addisonâs excluded if >500nmol/l
⢠adrenocortical insufficiency if <200 at 09:00
⢠SACTH test needed if 200-500
Short tetracosactrin (Synacthen) test
⢠high-dose (250mcg);
â normal if baseline >250 and 30-min >600 nmol/l
⢠low-dose (1 mcg) may be better for CENTRAL
adrenocortical insufficiency of recent onset
59. Investigations II
Biochemistry
â˘
â˘
â˘
â˘
â˘
â˘
â˘
â˘
Na+ low or normal, 120-140 mmol/l
K+ high or high-normal, 4.5-8
Glucose may be low
Urea may be raised
Calcium may be raised
Plasma renin activity elevated
Plasma aldosterone low (esp upright)
Hypothyroidism may coexist
Haematology
⢠Normocytic anaemia usual when hydrated
⢠Pernicious anaemia may coexist
61. Long-term replacement therapy - I
Glucocorticoid
â˘
â˘
â˘
â˘
hydrocortisone (formerly cortisone acetate)
first dose on waking, +1-2 further doses up to 18:00 hr)
maintenance doses e.g. 10/5mg to 15/10/5mg
adjust on clinical grounds; may do cortisol day curves
Mineralocorticoid
⢠9a-fludrocortisone 50-300mcg daily
⢠adjust using BP, U&E, ?PRA (plasma renin activity)
Androgen?
⢠DHEA may help some otherwise optimally-treated women with
persisting lethargy, low libido or low mood1
⢠not prescribable, available OTC
⢠?try 25-50mg od for 3-6 months, stop if no clear benefit2
1Arlt
et al, NEJM 1999; 341: 1013-1020)
LK. Treatment of adrenal insufficiency in adults. UpToDate. Accessed online 9/6/11
2Nieman
62. Long-term replacement therapy - II
Education
â˘
â˘
â˘
â˘
Double hydrocortisone during illness, then back to usual
Medic-Alert or similar
Vomiting is dangerous
Vial of hydrocortisone injection & syringe in fridge
Other points
⢠Depriving of fludrocortisone to treat essential hypertension is
unkind (postural hypotension)
⢠Beware osteoporosis due to over-replacement
⢠Consider DEXA scan
63. Management of Addisonian crisis in adult
Blood for cortisol, U&E, Cr, glucose, Ca, FBC
but donât wait for result
Glucocorticoid parenterally
Known Addisons: Hydrocortisone 100mg IV (or IM) stat, then 100mg 6hrly im or 4-hrly iv
Suspected new case: Dexametasone 4mg IV (or IM) - does not affect
cortisol assay
IVI 0.9% saline, preferably with added glucose;
?1 litre in first 30-60min, total up to 6 litres
CVP line in most cases
May need plasma expander & large amounts glucose
Monitor ECG, TPR, BP, glucose, U&E, Cr
Treat any underlying infection etc.
When stable
Short synacthen test in new case
Change to oral hydrocortisone 20mg tds + (resume) fludrocortisone
Later back to maintenance doses