endocrine dysfunction (hormone imbalances) in diamond blackfan anemia
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Endocrine dysfunction (Hormone imbalances) in Diamond Blackfan Anemia. Dr Amit Lahoti Dr Phyllis Speiser Cohen Children’s Medical Center of New York North Shore LIJ Hospital System. Diamond Blackfan Anemia (DBA) is a rare condition. Really!!!. 5-7 per 1,000,000 live births. DBA. - PowerPoint PPT PresentationTRANSCRIPT
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Endocrine dysfunction (Hormone imbalances)
in Diamond Blackfan Anemia
Dr Amit LahotiDr Phyllis Speiser
Cohen Children’s Medical Center of New YorkNorth Shore LIJ Hospital System
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Diamond Blackfan Anemia (DBA) is a rare condition.
Really!!!
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5-7 per 1,000,000 live births
1 per 100,000 live births
1 per 500 African-American live births
DBA
Beta thalassemia
Sickle-cell disease
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Role of a registry
For rare conditions, clear guidelines on how to manage the disease or its complications often not available.
A registry provides a unique opportunity to do systematic research.
Until more research data are available, doctors use best practices learned from other somewhat similar conditions.
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Treatment course of DBA
BMT recipients
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Pros and cons of DBA treatments Corticosteroids Chronic Transfusions Bone marrow
transplant
Pros No risk of iron overload
First line treatment for severe anemia under 1y
Can lead to resolution of anemia
Can improve quality of life
Cons Risk of low bone density
Frequent hospital visits for transfusions
Risk of Graft versus Host Disease (GVHD), and infection
Excess weight gain & impaired growth
Endocrine complications of iron overload
Risk of graft rejection
Increased risk of diabetes (at high doses)
Side-effects of immunosuppressive drugs & radiation
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Where do hormones come from and what do they do?
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Risk of Hormone disorders
in patients with DBA: Is it real?
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*Unpublished data presented at Pediatric Endocrine society meeting at Washington DC, 2013
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You or some one sitting next to you may have a similar story….
• At 6 months: Diagnosed with DBA – Monthly transfusions started.
• Subsequently developed Iron overload– Chelation therapy with Desferal started
• At 14.5 years, 7/2004: went to ER for frequent urination, excessive thirst and 15 lb weight loss. Blood glucose markedly elevated. Diagnosed with Diabetes mellitus, – Insulin therapy started
• Two months later, 9/2004: Thyroid function tests show Thyroid gland failure. – Thyroid hormone started
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In the next year…• At 15 years, 12/2004: Teen non-compliant with insulin
regimen & diet. Poor blood glucose control, stunted growth, despite normal GH levels. Diagnosed Growth hormone resistance.– Growth hormone therapy started
• At 15.75 years, 10/2005: Delayed puberty with evidence of Pituitary failure. – Testosterone therapy started.
• At 16.5 years, 5/2006: Multiple seizures related to low blood glucose despite not being compliant with insulin regime. Diagnosed with Adrenal insufficiency– Hydrocortisone therapy started.
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And as time went by…
• Two months later, 7/2006: Complaints of frequent urination at night. Diagnosed Diabetes insipidus.– DDAVP treatment started.
• At 17.5 years, 8/2007: Evidence of Diabetic kidney damage.– Enalapril treatment started.
• At 18 years, 2/2008: Growth hormone therapy stopped. Adult height: 5 feet.
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Hormone problems can start in childhood!
You are never “too young” to be tested.
Early diagnosis can avoid later problems.
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What are these conditions?How common are these?
Are you at risk?How can you be tested for these?
How are they treated?
Questions?
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HypogonadismAbsent or delayed pubertyWhat is it?
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HypogonadismWhat is Delayed Puberty?• In girls, no breast development by 13 years, or
no periods by 15 years or by 2 years after breast development.
• In boys, no testicular enlargement by 14 years
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Hypogonadism
Males: Testosterone injections or skin gel.Females: Estrogen oral or skin gel.
Blood sampling for pituitary puberty-regulating hormones (LH and FSH) and sex hormones (Testosterone or Estradiol). Bone age x-ray of hand.
• With iron overload: 30-50%• After BMT: Females- ovarian malfunction in ~100%Males- testicular dysfunction in 0-40%
How common?
How to diagnose?
How to treat?
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HypothyroidismInsufficient thyroid hormoneWhat is it?
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Hypothyroidism
Or, no symptoms at all!!! ( especially in early stages)
Feeling cold out of ordinary
Not growing well
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Hypothyroidism
Once a day thyroid hormone (tablets)
By measuring blood levels of:Thyroid stimulating hormone (TSH); andTotal and free Thyroid hormone (T4)
• Patients with iron overload: 2-20 %• Patients on steroids and after BMT: Less common, frequency unknown
How common?
How to diagnose?
How to treat?
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Adrenal insufficiency
Stress hormone (cortisol)
Salt retaining hormone (Aldosterone)
Male hormones
What is it? Not enough adrenal hormones
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Adrenal insufficiency
Symptoms may be missed or attributed to anemia or missed!
Dark color of non-sun- exposed areas
Low BP and dizziness
Extreme tiredness
Nausea, vomiting, abdominal pain, diarrhea, constipation
Muscle weakness
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Adrenal insufficiency
Hydrocortisone: to replace stress hormone. May only be needed during periods of stress.Fludrocortisone: salt-retaining hormone.
Blood measurements of:8 AM cortisol level, Plasma renin activity, aldosterone, Androstenedione and DHEAS levels
Patients on steroids: considered to have adrenal insufficiency
Patients with iron overload: biochemical adrenal insufficiency (often partial): 18-45%
How common?
How to diagnose?
How to treat?
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Question #1
• Which of the following is NOT a part of the endocrine system?
a)Thyroidb)Pituitaryc) Appendix d)Adrenals
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Question #2
• This gland is sometimes called the master gland, though it is only about the size of a pea
a)Thyroidb)Pituitaryc) Pineald) Hypothalamus
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Question #3
• Which of the following is the largest endocrine gland in the body:
a)Thyroidb)Parathyroidc) Pancreasd)Adrenal
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Diabetes mellitusWhat is it? Not enough insulin hormone
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Diabetes mellitus• Both iron overload and glucocorticoids lead to: ↓in insulin secretion; and ↓ in insulin sensitivity
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Diabetes mellitus
• Diet changes, • Insulin therapy and/or • Oral medications
• Fasting blood glucose• Fructosamine level (HbA1c may not be reliable if on transfusions)• Oral glucose tolerance test
• With Iron overload: 9-14%• On Chronic glucocorticoids: dose dependent. May be
reversible.• BMT: depends on pre-transplant factors.
How common?
How to diagnose?
How to treat?
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Growth Problems
For patients <18 years age:• How many of you are shown your/ your child’s
growth chart during the visit with the pediatrician or hematologist?
• How many of you have asked to see your/ your child’s growth chart during these visits?
Growth chart is an important tool to detect poor growth or short stature at an early age!!!
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Growth problems
Multiple causes of poor growth in DBA patients
Short stature
Anemia and ?DBA itself
Absent/ Abnormal puberty
Iron overload
Low Growth hormone Hypothyroidism
Glucocorticoids
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Growth problems
• Specific to the cause. • However, final height may still be low for mid-parental height.
• Regular growth monitoring for early detection• Laboratory testing to rule out specific endocrine causes.
• DBA itself: Reported short stature ~30%• Effect on growth due to iron overload or steroids alone is hard to quantify in DBA due to this. • BMT: may improve growth.
How common?
How to diagnose?
How to treat?
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Bone disorders
Multiple causes of poor bone density in DBA patients
Weak bones
Hypogonadism
Low Vitamin D & parathyroid gland failure
Iron overload
? Low Growth hormone Diabetes mellitus
Glucocorticoids
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Bone disorders
• Treat any co-existing hormone problem• Vitamin D supplements: Adequate level?• Other medications: Bisphosphonates• Newer drugs being developed.
• Test for other endocrine problems• Blood levels of Calcium, parathyroid hormone and vitamin D• Bone mineral density scan
• With Iron overload: upto 50%• On Chronic glucocorticoids: Dose and duration
dependent.• After Bone marrow transplant: Not known
How common?
How to diagnose?
How to treat?
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Importance of Screening
• Vague symptoms may also be seen with anemia itself. • Often no/minimal symptoms in early stages.
Diabetes screening in non- diabetic otherwise asymptomatic beta thalassemia patients
14% impaired glucose
tolerance
1.5% Diabetes mellitus
84.5%: normal
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Importance of Chelation
Normal glucose
tolerance
Impaired glucose
tolerance (IGT)
Insulin dependent diabetes mellitus
Years 12.4%
~10 Years
Intensive chelation in patients with IGT can improve beta-cell function, improve blood glucose values.Less effective in patients who have developed DM and in improving insulin resistance.
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Treatable nature of most of these conditions!-
That’s what I love about endocrinology!!!
• Timely diagnosis & treatment can prevent morbidity and possible mortality associated with some endocrine conditions.- Versus possible long-term adverse effects of an
untreated endocrine problem.
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What do we need to do?
• The only published reports about hormone problems in DBA patients are in form of case reports or case series with few patients.
• Collect more information about endocrine problems in DBA patients like you.
Vs
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About our research studySPECIFIC AIMS:1. To study the effects of iron overload on various endocrine
glands in DBA patients receiving transfusions.2. To estimate how common are these hormone
abnormalities in the DBA population and correlate it with measures of iron overload.
3. To recommend a possible method to screen the at-risk DBA patients for endocrine dysfunctions at regular intervals.
4. To compare the presence of endocrine dysfunction in chronic transfusion dependent DBA population with DBA patients not on chronic transfusions and beta thalassemia major patients on chronic blood transfusions.
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About our research study
Eligibility Criteria:Inclusion criteria: Age 1-39 years; and Diagnosed with DBA and enrolled in DBA
Registry (DBAR), or Diagnosed with beta thalassemia major and
followed at NSLIJ pediatric hematology division. Exclusion criteria: Pregnant; or Having received a bone marrow transplant
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About our research study
Our goal is 75 DBA patients and 25 thalassemia patients total for the study.
THANK YOU IN ADVANCE FOR YOUR PARTICIPATION!!!
• Participation involves a standard endocrine evaluation. • This includes blood tests that can be ordered and drawn at your primary institution. The participation consent asks for permission for us to receive the endocrine evaluation results.
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THANKS FOR LISTENING!!!