define osteoporosis & relate to fracturejsog.org/uploads/s/d1/dr. lubna 2.pdfnormal bone...
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Define osteoporosis & relate to fracture risk
Relate ovarian physiology to skeletal health
Screening for “at risk” for fragility fractures
Review fracture risk reduction strategies and options
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51 year old Caucasian female attorney, with a 6 month history of amenorrhea, bothersome VMS, and overall deteriorating QOL.
Nonsmoker, physically active History of wrist fracture
following a fall at age 45. Family history of osteoporosis –
mother & maternal aunt. Breast cancer in sister (age 58) Patient is concerned about
her risk for breast cancer. Normal BMI
Optimal fracture risk reduction strategy will include:
A. Raloxifene as her breast cancer risk is high
B. Menopausal hormone therapy
C. Bisphosphonate Rx as her lifetime fracture risk is high
D. Tamoxifen as her risk for breast cancer is high
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Normal bone Osteoporosis
A disease characterized by low bone mass and microarchitectural deterioration of bone tissue leading to enhanced bone fragility and a consequent increase in fracture risk.
World Health Organization (WHO), 1993
Osteoporosis
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J.C. Gallagher, A.J. Sai / Maturitas 65 (2010) 301–307
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5 15 25 35 45 55 65 75 85
Age (Years)
Pubertal Growth Spurt Peri Menopause
BMD
Resorption
Formation
Menopause
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60
70
80
90
100
30 40 50 60 70 80 90
Age
Rela
tive
BMD
(%) Forearm
SpineHip and Heel
0
1000
2000
3000
4000
30 40 50 60 70 80 90 +
Colles'VertebraeHip
Age
Ann
ual F
ract
ure
Inci
denc
e
Cooper C. Baillières Clin Rheumatol. 1993;7:459–477.
Faulkner KG. J Clin Densitom. 1998;1:279–285.
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Fracture Risk
Less Bone
Lost Bone
Bad Bone
Fall Risk
GeneticsPOI
MenopauseDiseases
VisionParkinsonism
DementiaArthritisDrugs
Vitamin D DeficiencyCollagen Disease
Metastases
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Advancing age Low body weight ≤ 127lbs
Race Caucasian
Reproductive profile Late menarche Early menopause
SmokingAlcohol >2 drinks/dayFracture History
Family/personal
Medical Disorders Hypogonadism Arthritis Diabetes Seizure Malabsorption Collagen disorders Chronic renal disease Chronic liver disease Hematological Fall Risk Alcoholism Impaired vision Dementia HIV
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Hormones & Modulators Glucocorticoids Thyroid hormone Aromatase inhibitors Ovarian suppression
› GnRHagonist/antagonist
› High dose IM progestin
Androgen deprivation Immune modulators
› Cyclosporin
Anti-diabetic agents› Thiazolidinediones
Antidepressants› SSRI’s
Anticonvulsants Drugs used for vascular
benefit› Heparin › Oral anticoagulants
Anti-retroviral therapy Drugs used for GI
diseases› Proton pump
inhibitors
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0
2
4
6
8
10
12
14
16
Age 48 Years Age 53 Years
Ost
eopo
rotic
Wom
en (%
)
Perimenopause Postmenopause
n = 5896.Modified from Smeets-Goevaers CG, et al. Osteoporos Int. 1998;8:404-9.n = 5896.Modified from Smeets-Goevaers CG, et al. Osteoporos Int. 1998;8:404-9.
At a given age osteoporosis is less prevalent in perimenopausal women compared with menopausal women.
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Menopausal Pelvic Organ Prolapse … an overt marker for covert skeletal
fragility?
Pal L et al. Menopause. 2008;15(1):59-66.Pal L, et al. Menopause 2011 Sep;18(9):967-73.
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POP Any Type
Rectocele
Cystocele
Risk for Incident Hip Fracture in Postmenopausal women with moderate to severe POP
Crude
Adjusted 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
Decreasing HR Increasing HR
HR 1.85 (1.22-2.80)
HR 2.12 (1.15-3.88
HR 1.81 (0.67-4.88)
HR 1.79 (1.05-3.07)
Pal L, et al. Menopause 2011 Sep;18(9):967-73.
HR 1.83 (1.16-2.89)
HR 2.18 (1.14-4.17)
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5 15 25 35 45 55 65 75 85
Premenopause Peri Menopause
BMD
Resorption
Formation
Menopause
VMSDOR
DMPAOCP
POP
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FRAX™. Available at: http://www.shef.ac.uk/FRAX/index.htm.
BMD Based Clinical Risk Assessment
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› Normal:
T-score ≥ –1
› Low bone mass (Osteopenia):
T-score between –1 and –2.5
› Osteoporosis:
T-score at or below –2.5
WHO Study Group. WHO Technical Report Series. 1994;843:5-6.
WHO BMD diagnostic classification must NOT be applied to premenopausal
women, men <50 & in children
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Age BMI Prior history of fracture Parental history of fracture Current smoking Current Alcohol >3 units/day Rheumatoid Arthritis Glucocorticoid use
http://www.shef.ac.uk/FRAX/index.htm
Secondary Osteoporosis Hypogonadism IBD Prolonged Immobility Organ Transplant Type I Diabetes Thyroid Disorders
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History Medical/FamilyEnvironment Nutrition
Physical ExamExisting fractureFall RiskVision
BMDSpineHipsForearmHeelLVA
FRAXLab Tests
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Chemistry CBC TSH PTH (Intact) 25OHD /1,25(OH)D Bone turnover
markers› NTX/BSAP
Assess Hypogonadism› FSH/E2/AMH
24 hour urine › Ca/Cr› Na› UFC – if suspecting
Cushing Syndrome Serum protein- if
suspecting multiple myeloma
Hemoglobin electrophoresis (if indicated)
Lateral spine imaging
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Formation Markers Serum Alkaline
phosphatase Serum bone–specific
alkaline phosphatase Serum Osteocalcin Serum Type 1 procollagen
(C-terminal/N-terminal): C1NP or P1NP
Resorption Markers Urinary
› Hydroxyproline › Total pyridinoline (PYD) › Free deoxypyridinoline
(DPD) › N-telopeptide (NTX) › C-telopeptide (CTX)
Serum › CTX› Bone sialoprotein (BSP) › TRAP
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0
1
2
3
4
5
6
Low BMD High Bone Turnover Low BMD + High BoneTurnover
Women ≥75 Years of Age (n = 7598)
Risk
of H
ip F
ract
ure
Garnero P, et al. J Bone Miner Res. 1996;11:1531-8.
2.72.2
4.8
2.7 fold 2.2
4.8
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Who to treat?›Prevention versus Treatment
When to treat? ›BMD threshold›Fracture Risk Assessment
What to treat with??
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Treat all patients with existing fracture
High Risk- Treat
Moderate Risk –Treat if other risks
Low Risk-Reassess 1-2 years
T-Score *
< - 2.0
< -1.5 + ≥ 1 Risk Factor
> -1.5 - Monitor
*Based on axial skeletal DXA- NOF guidelines
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Low BMD (T-score between -1.0 & -2.5 at femoral neck or spine)
AND
A 10-year fracture probability › ≥ 3% for hip fracture › ≥ 20% for a major osteoporosis-
related fracture
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Drug Vertebral # Nonvertebral #Bisphosphonates + +/-Raloxifene + -Calcitonin + -Parathyroid hormone
+ +
Denosumab + +Strontium + +Estrogen/EP + +TSEC + +
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Osteoporosis Falls
McClung MR, et al. Bone. 2006;38(2 suppl 2):S13–17.
•Pharmacotherapy •Vision•Cognition•Balance•Injury prevention
- Hip guards
Calcium Vitamin D
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Is Treatment Working? Repeat BMD
›Timing ›Device›Data Compare absolute bone mass and not T-scores! Know LSD
Bone Markers Which? When?
› Baseline & 3-6 months after Rx initiated
How Long to Treat?› 2-5 years
Drug Holiday? Sequential therapy?
› Anabolic followed by anti resorptive
Rare Events› ONJ› Atypical fractures › Arrhythmias
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Pros Established efficacy
against fracture risk reduction -vertebral and non-vertebral #
Provides symptom control in addition to bone protection
Improved QOL Cost effective given
existing generic options
Cons Risks
› Thrombo-embolism› Stroke› Breast Cancer
Rapid loss of benefit following discontinuation
Less efficacious compared to other bone sparing agents
Not approved for treatment of established osteoporosis
Consideration-Early menopausal -Symptomatic-Low risk for CVD- Uterus present?
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Pros Established anti fracture
efficacy against vertebral & non-vertebral #
Prevention & Treatment Routes of administration
› Oral (tablet, liquid)› IV
Infrequent dosing option Residual effect after
discontinuation Cost effective option
with use of generic drugs
Cons Side effects
› Upper GI› Osteonecrosis of Jaw› Atrial Fibrillation› Atypical femoral # › Renal failure
Long term effects? Cost
Considerations-GI/Dentation/Arrythmias/Renal-Menopausal status?-Drug holiday -Dual therapy?
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Pros Anti-fracture efficacy
› Site specific Breast cancer
chemoprophylaxis Cost effectiveness in
fracture prevention in relatively young postmenopausal women
Cons Efficacy against non-
vertebral # not established for Raloxifene
Risks:› Thromboembolism› Endometrial
hyperplasia Side effects
› Bothersome vasomotor symptoms
› Undesired urogenital effects
Considerations:-Menopausal status?-Menopausal Symptoms?-BREAST CA RISK?-Site specific #risk?
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Pros Symptom control Anti-fracture
efficacy No effect on
endometrium- no need for progesterone
No effect on breast tissue› Potential
chemoprophylaxis?
Cons Risks:
› Thromboembolism New Kid…
› Real use data awaited
Considerations:-Menopausal status?-Menopausal Symptoms?-BREAST CA RISK?
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Pros Most efficacious of
available agents against fracture risk.
Only anabolic available
Efficacy against vertebral and non-vertebral fracture prevention
Cons Expensive
› Cost effective only if fracture risk is markedly elevated
Daily subcutaneous injection
Risks/side effects› Concerns for
osteosarcoma› Bone pain› Injection site reaction
Rapid loss of benefit following discontinuation
Considerations: -HIGH FRACTURE RISK-Existing vertebral fractures?-Sequential therapy?
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Pros Established efficacy against
fracture risk reduction in:› patients with severe
osteoporosis › When other therapies are
inefficacious or not tolerated.
Vertebral and non-vertebral # risk reduction
Targeted skeletal therapy with minimal systemic concerns
Infrequent subcutaneous dosing (q6mth)
Approved for prevention of skeletal related events in patients with bony metastases
Cons Long term data are lacking Rapid loss of benefit following
discontinuation Expensive Risks/side effects:
› Infections/cellulitis› ONJ
Consideration :- Not tolerating other agents-High fracture risk-Renal failure
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Pros Efficacy against
vertebral fracture risk reduction
Nasal and subcutaneous or IM dosing option
Analgesic effect –benefit when existing vertebral #
Cons Less efficacious than
other options Not effective against
non-vertebral # prevention
Risks/side effects:› Nasal bleeding› Runny nose› Headache› Back pain› Flushing, nausea, skin
rashes› Allergic reactions
Consideration-Back pain & existing vertebral # -Pain secondary metastases-Poor tolerance to other agents
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Pros Efficacy against
fracture risk reduction for vertebral and non-vertebral sites.
Estrogen Agonist effects on:› Skeleton› Vagina› Symptoms
Estrogen Antagonist effects on:› Breast› Uterus
Cons Long term data are
lacking
Consideration:Future of HT? FDA ApprovedAccess/availability
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Osteoporotic Patient Profile Suggested 1st Line RxCompliant older patient without GI concerns Bisphosphonates (PO)
Older patient with GERD Bisphosphonates (IV) or Denosumab
48 yo symptomatic early menopausal woman MHT
48 yo asymptomatic with family h/o breast cancer
SERM
Older patient, poor dentation Calcitonin, PTH
Older patient with compliance issues Bisphosphonate (IV) or Denosumab
Renal insufficiency Denosumab
Nursing Home Patient Bisphosphonate (IV) or Denosumab
High Risk for Fracture PTH, Denosumab
Back Pain Secondary to Metastases Calcitonin
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51 year old Caucasian female attorney, with a 6 month history of amenorrhea, bothersome VMS, and overall deteriorating QOL.
Nonsmoker, physically active History of wrist fracture
following a fall at age 45. Family history of osteoporosis –
mother & maternal aunt. Breast cancer in sister (age 58) Patient is concerned about
her risk for breast cancer. Normal BMI
Optimal fracture risk reduction strategy will include:
A. Raloxifene as her breast cancer risk is high
B. Menopausal hormone therapy
C. Bisphosphonate Rx as her lifetime fracture risk is high
D. Tamoxifen as her risk for breast cancer is high
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1. Fracture risk is determined by bone quantity & quality
2. Advancing age & loss of estrogen result in decline in bone
quantity & quality
3. Fracture risk assessment must be individualized
› Age/Fall risk / Comorbidities/Bone mass /Bone turnover
4. Choice of anti-fracture Rx should be tailored to unique
patient profile & magnitude of fracture risk
5. MHT is an effective strategy for the relatively young early
menopausal women deemed at an enhanced fracture risk
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Define osteoporosis & relate to fracture risk
Relate ovarian physiology to skeletal health
Screening for “at risk” for fragility fractures
Review fracture risk reduction strategies & options
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Cooper C , et al. Long-term treatment of osteoporosis in postmenopausal women: a review from the European Society for Clinical and Economic Aspects of Osteoporosis and Osteoarthritis (ESCEO) and the International Osteoporosis Foundation (IOF). Curr Med Res Opin. 2012; 28 (3): 475-91.
Ebeling PR. Role of biochemical markers in the management of osteoporosis. Best Pract Res Clin Rheumatol. 2001;15(3):385-400.
Reginster JY. Antifracture efficacy of currently available therapies for postmenopausal osteoporosis. Drugs. 2011;71(1):65-78.
Laster AJ. Duration of treatment in postmenopausal osteoporosis: how long to treat and what are the consequences of cessation of treatment? Rheum Dis Clin North Am. 2011 Aug;37(3):323-36, v.