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Dr. Maynard’s presentation on the types of collagen vascular disease in children (presented on 9/22/11).
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Collagen Vascular Disease
in Children
Roy Maynard, M.D.
September 22, 2011
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Objectives
• Define collagen vascular disease.
• Identify 3 collagen vascular diseases
that affect children.
• Understand the role new biological
modifying agents have on treating
collagen vascular disease.
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Definition
• A diverse group of multi-system inflammatory disorders, affecting primarily collagen in the skin and joints. Autoantibody formation and other autoimmune dysfunction suggest a complex immune basis in the pathogenesis of the disease process which remains largely idiopathic
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Classification
• Vasculitis
• Arthritides
• Connective tissue disease
• Infectious diseases
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Collagen Vascular Disease
• Systemic Lupus Erythematous
• Dermatomyositis
• Scleroderma
• Juvenile Idiopathic Arthritis
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Epidemiology
• 150-200 children/million
• 0.015 to 0.02% of children
• Female preponderance
• Fairly uncommon disease in children
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Pathogenesis
• Molecular mimicry: Infectious agents alter the surface markers of ones own cells leading to them being recognized as foreign by your immune system.
• Autoimmunity: Idiopathic alterations in the basic immune system leading to the recognition of cells and tissues as foreign and subsequently attack as foreign.
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Treatment
• Glucocorticsteroids
• Immunosuppressives
• Immunomodulators
• Anti-inflammatory
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Systemic Lupus Erythematosus
• Diagnosis
– Malar rash
– Discoid rash
– Photosensitivity
– Oral ulcers
– Arthritis
– Serositis (pleural or pericardial)
– Renal (proteinuria)
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Systemic Lupus Erythematosus
Malar rash
http://www.emedicinehealth.com/script/main/art.asp?articlekey=107976 Accessed on 9/19/11
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Systemic Lupus Erythematosus
• Epidemiology
– 0.36 to 0.4 children/100,000
– Girls/boys (4:2 to 7:1)
– Rare diagnosis before age 5
– Peaks young adulthood
– 15-20% of adults started disease in childhood
– Age 12 to 14 years when disease diagnosed
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Systemic Lupus Erythematosus
• Diagnosis
– Neurologic (seizures or psychosis)
– Hematologic
• Hemolytic anemia
• Leukopenia
• Lymphopenia
• Thrombocytopenia
– Immunologic disorder
• Positive LE prep
• Anti-dsDNA antibody
• Anti-Smith antibody
• False positive syphilis test
• Antinuclear antibody, C3 and C4
– Other organs
• Kidneys, lungs, cardiac
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Systemic Lupus Erythematosus
• Prognosis
– In 1950, only 30% survived 5 years
– Now 5-year survival > 90%
– Pediatric SLE has a worse prognosis than adult SLE
– Risk factors for poor outcome include kidney disease, frequent flares, infections, neuropsychiatric manifestations
– Lower physical and psychosocial than healthy children
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Systemic Lupus Erythematosus
• Treatment
– Hydroxychloroquine
– Azathioprine
– Glucocorticoids
– NSAID
– Chemotherapeutic agents • Methotrexate, Cyclophosphamide
– IVIG
– Biologicals - rituximab
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Dermatomyositis
• Autoimmune disease
• Primarily affects skin and muscle
• Incidence: under age 16, affects 3,000-5,000 children in U.S. 3 new cases per year/million people
• Average age of onset is 7 (ages 5 – 10)
• Found worldwide, more prevalent in North America
• May be more common in African-Americans
• Adult version presents age 50
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Dermatomyositis
• Etiology idiopathic
• Combination of genetics and infection
• May be partially inherited (genetic
predisposition to acquire the disease)
• Not contagious
• More common in females than males
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Dermatomyositis
• Signs and symptoms:
– Fever
– Fatigue
– Skin rash
– Muscle weakness
– Pain
– Lung disease
– Joint contractures
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Dermatomyositis
Heliotrope rash
http://www.pediatricsconsultantlive.com/pedsquiz/content/article/1803329/1691415 Accessed on 9/20/11
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Dermatomyositis
• Diagnosis:
– Clinical diagnosis
– Increased CPK, aldolase, SGOT
– MRI of involved muscles
– Muscle biopsy
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Dermatomyositis
http://www.learningradiology.com/caseofweek/caseoftheweekpix2006/cow207lg.jpg Accessed on 9/20/11
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Dermatomyositis
http://www.nlm.nih.gov/medlineplus/ency/imagepages/1866.htm Accessed on 9/20/11
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Dermatomyositis
• Treatment:
– Prednisone
– Methotrexate
– Hydroxychloroquine
– Cyclosporine
– IVIG
– Mycophenolate
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Dermatomyositis
• Prognosis:
– Most children go into remission within 2 years
– Pulmonary involvement heralds poor prognosis
– Increased risk for malignancy
– Joint contractures are a long term complication
– Some do not respond well to medications
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Scleroderma
• Autoimmune disease
• Normal tissues replaced with dense, thick scar tissue
• Skin most common site
• Kidneys, heart, lung, GI tract
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Scleroderma
• 5,000 – 7,000 children in U.S.
• Only 1.5% develop disease before age 10
• 7% develop disease between age 10 to 19
• 2/3 are female
• Immune system triggers other cells to produce excessive collagen
• Idiopathic
• Not contagious
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Pediatric Scleroderma
• Two types:
– Localized scleroderma
• Skin (linear and morphea)
– Systemic scleroderma
• multiple organs
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Pediatric Scleroderma
• Localized Scleroderma:
– Most common form in children
– Usually skin only, occasionally underlying muscle
– Linear type appears as a band usually on
extremities, may limit motion when crosses a joint
– Morphea type - patches, waxy skin with an ivory or
white color
– Both appear white with purple borders
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Scleroderma
• Signs and symptoms:
– Loss of stretch in skin
– Discoloration of skin
– Thinning of the skin
– Contractures of fingers
– Joint inflammation
– Raynaud’s phenomenon
– Ulcers on fingertips
– Dysphagia and other GI tract problems
– Fatigue, muscle weakness
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Scleroderma
http://www.skinpatientalliance.ca/en/skin-conditions-diseases/connective-tissue-disorders Accessed on 9/20/11
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Scleroderma
• Diagnosis:
– Clinical diagnosis
– Skin biopsy
– Autoimmune blood testing
– Swallow study
– Lung testing
– Cardiac echo
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Linear Scleroderma
http://bjo.bmj.com/content/91/10/1311/F1.large.jpg Accessed on 9/20/11
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Scleroderma
• Treatment:
– Prednisone
– Methotrexate
– NSAID
– Environmental
– Physical therapy
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Scleroderma
• Prognosis:
– Chronic and slowly progressive
– Months to years
– Localized vs. systemic
– May stabilize without progression for years
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Juvenile Idiopathic Arthritis
• Clinical manifestations: – Fever
– Rash
– Serositis
– Joint involvement pain, swelling, stiffness, limping
– Growth delay/weight loss
– Psoriasis
– Uveitis, eye pain, vision disturbances
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Juvenile Idiopathic Arthritis
http://www.google.com/imgres?q=juvenile+idiopathic+arthritis&hl=en&sa=X&rlz=1R2ADFA_enUS410&tbm=isch&prmd=imvnsb&tbnid=27oK6oBuClFabM:&imgrefurl=http://www.isteroids.com/blog/canakinumab-effective-for-systemic-juvenile-
idiopathic-arthritis/&docid=L5cA1hDwO1EF4M&w=200&h=114&ei=gwN5TvKEJ8Watwey0cT2Dw&zoom=1&biw=1440&bih=730&ia
ct=rc&dur=225&page=1&tbnh=91&tbnw=160&start=0&ndsp=20&ved=1t:429,r:12,s:0&tx=89&ty=61)
Accessed on 9/19/11
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Juvenile Idiopathic Arthritis
• Diagnosis: – >6 weeks of arthritis
– Less than 16 years of age
– Unknown cause R/O Lyme’s, infection, Kawasaki’s Disease, immunodeficiency
• Epidemiology: – Most common childhood chronic rheumatic
disease
– Incidence: 2-20 cases/100,000
– Prevalence: 16-150/100,000
– 0.07–4.01 per 1,000 children worldwide
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Juvenile Idiopathic Arthritis
(ROY—CLARIFY WEBSITE REFERENCE FROM ORIGINAL SLIDE #38)
Accessed on 9/19/11
http://trialx.com/curetalk/wp-content/blogs.dir/7/files/2011/05/diseases/Juvenile_Idiopathic_Arthritis-1.jpg Accessed on 9/20/11
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Juvenile Idiopathic Arthritis
Drug Des Devel Ther. 2011; 5:61-70
• Systemic 5-10
• Oligoarthritis 40-50 – Persistent 25-35 – Extended 15-20
• Polyarthritis 30-40 – Rheumatoid factor neg 25-35 – Rheumatoid factor pos 5
• Psoriatic arthritis 5-10
• Other 15-20
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Juvenile Idiopathic Arthritis
IMAGE 1: http://images.rheumatology.org/image_dir/album75693/md_99-06-0019.tif.jpg
IMAGE 2: http://www.google.com/imgres?imgurl=http://www.ajronline.org/content/vol185/issue2/images/large/00_04_1385_07a.jpeg&imgrefurl=http://www.ajronline.org/cgi/content-nw/full/185/2/522/FIG17&usg=__M1LQ2tyC2JT86hM8wz41fj-SGpk=&h=1800&w=1037&sz=257&hl=en&start=23&zoom=1&tbnid=aRD8JZwu9_P_6M:&tbnh=150&tbnw=86&ei=e-pfTqadMYi3twf8v6imCw&prev=/search%3Fq%3Djuvenile%2Bidiopathic%2Barthritis%26start%3D21%26hl%3Den%26sa%3DN%26rls%3Dcom.microsoft:en-us%26rlz%3D1I7ADRA_en%26tbm%3Disch%26prmd%3Divnsb&itbs=1)
Accessed on 9/20/11
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Juvenile Idiopathic Arthritis
• Pathogenesis:
– Multifactorial autoimmune
– Environmental and genetic factors
– Polygenomic
– European ancestry may be a risk factor
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Juvenile Idiopathic Arthritis
• Treatment:
– Non-steroidal
– Steroids
– Disease-modifying anti-rheumatic drugs
• Methotrexate blocks folate interaction so decreased DNA, RNA, proteins
• Sulfasalazine blocks production of proinflammatory prostaglandins
• Leflunamide blocks pyrimidine production, anti-proliferative
– Biological Modifying agents
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Juvenile Idiopathic Arthritis
• Biological Modifying agents:
– Etanercept (Enbrel) synthetic protein binds to TNF alpha, prevents TNF from binding to cells
– Infliximab (Remicade) monoclonal antibody to TNF
– Adalimumab (Humira) human monoclonal antibody against TNF
– Abatacept (Orencia) fusion protein blocks stimulation of T cells
– Anakinra (Kineret) interleukin-1 receptor antagonist
– Tocilizumab (Actemra) monoclonal antibody against interleukin-6
– Rituximab (Rituxan) monoclonal antibody against CD20 positive B cells
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Juvenile Idiopathic Arthritis
• Prognosis:
– Goal is clinical remission
– Definition of remission: No active
arthritis, fever, rash, serositis,
lymphadenitis, uveitis, normal CRP and
sed rate, no disease activity for 6 months
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Long-Term Complications
• Functional limitation
• Osteopenia
• Nutritional deficiencies
• Chronic pain
• Psychological distress
• Infection
• Delayed puberty
• Cancer?
• Death
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Conclusion
• Collagen vascular diseases are rare in children
• More common in females than males
• Not contagious
• Etiology largely unknown but genetics and environment may play a role
• New biologic agents may improve the outcome for these patients
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Q&A
Thank you for attending!
QUESTIONS?