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Sarcoidosis
Aka: Sarcoidosis, Lupus Pernio, Lofgren's Syndrome
- Epidemiology
- Affects young adults most commonly ages 20 to 40 years
- Prevalence in United States
- Most common in U.S. Blacks, Danes and Swedes
- Black patients: 40 per 100,000
- White patients: 5 per 100,000
- History
- First described by Hutchinson in 1877
- Pathophysiology
- Noncaseating granuloma formation
- Idiopathic
- Underlying genetic predisposition
- Precipitated by trigger
- Infection (e.g. Mycobacteria, Borrelia Burgdorferi)
- Environmental exposure (e.g. Beryllium, Aluminum)
- Common involvement sites (affects all organ systems)
- Lungs (>90%)
- Interstitial Lung Disease
- Lymphadenopathy: Hilar adnenopathy (>95%)
- Liver (50-80%)
- Hepatic Granulomas (86%)
- Hepatomegaly (20%)
- Increased Alkaline Phosphatase
- Spleen (40-80%)
- Skin lesions (25%)
- Lupus Pernio
- Dactylitis
- Eyes (20-50%)
- Anterior Uveitis (18%, also in Spondyloarthropathy)
- Posterior Uveitis (7%, Behcet's Disease)
- Lacrimal gland hypertrophy
- Conjunctival Nodules
- Keratoconjunctivitis (also in Sjogren's Syndrome)
- Proptosis (also in Wegener's Granulomatosis)
- Heart (5%)
- Tachyarrhythmias
- Cardiomyopathy
- Kidney (uncommon)
- Membranous Glomerulonephritis
- Nephrocalcinosis
- Nephrolithiasis
- Renal insufficiency
- Bone Marrow (4-40%)
- Leukopenia (28%)
- Eosinophilia (34%)
- Gastrointestinal
- Pancreas (6%)
- Stomach or esophagus
- Parotid Gland (5%, also seen in Sjogren's Syndrome)
- Skeletal muscle (4%, also seen in Polymyositis)
- Upper airway (3%, also in Wegener's Granulomatosis)
- Saddle-nose deformity
- Symptoms
- Pulmonary (presenting symptom in 40-45%)
- Dry cough
- Dyspnea
- Chest Pain (non-specific)
- Hemoptysis (rare initially)
- Constitutional symptoms (presenting symptom in 25%)
- Fever (associated with hepatic granulomas)
- Weight loss
- Fatigue
- Malaise
- Signs: Arthritis (occurs in 10-15% of cases)
- Early joint disease (first 6 months)
- Duration: weeks to 3 months
- Common joints involved
- Onset in ankles
- Spreads to knees
- Involves other joints
- Proximal interphalangeal joint
- Metacarpophalangeal joint
- Wrist
- Elbow
- Spares axial skeleton
- Associated with Erythema Nodosum
- No XRay changes
- Late joint disease (onset after 6 months)
- Common joints involved
- Knees
- Ankles
- Proximal interphalangeal joints
- Associated with chronic cutaneous Sarcoidosis
- XRay changes (see below)
- Signs: Skin changes (Lupus Pernio)
- Initial Characteristics
- Papular lesions (most common)
- Reddish-brown to purple color (violaceous Plaques)
- Scaling may occur
- Diameter: 1 to 3 cm
- Later Characteristics
- Lesions coalesce into Annular Lesions or Plaques
- Chronic form may show scarring and disfigurement
- Distribution (most commonly involves face)
- Periorbital area
- Nasolabial folds
- Mucous membranes
- Ears
- Fingers and Toes
- Other skin changes
- Dactylitis (sausage digits)
- Associated with chronic arthritis
- Signs: Lymphadenopathy
- Mediastinal lymph node involvement most common
- Peripheral Lymphadenopathy (non-tender, <5 cm)
- Cervical Lymphadenopathy
- Axillary Lymphadenopathy
- Inguinal Lymphadenopathy
- Epitrochlear Lymphadenopathy
- Staging
- Based on Chest XRay (see below)
- Radiology: Chest XRay (abnormal in 90% of cases)
- Type 0: No abnormality (<10% of cases)
- Type I: Lymphadenopathy alone (43% of cases)
- Bilateral hilar Lymphadenopathy
- Mediastinal Lymphadenopathy
- Right paratracheal Lymphadenopathy
- Type II: Adenopathy and Infiltrates (24% of cases)
- Lymphadenopathy as in Type I Chest XRay findings
- Parenchymal infiltrates
- Symptomatic respiratory disease presentation
- Type III: Infiltrates alone (13% of cases)
- Parenchymal infiltrates
- Radiology: Joint and Bone XRay in arthritis
- Acute Arthritis not associated with XRay changes
- Chronic Arthritis uncommonly with XRay changes
- Middle and distal phalanx bone destruction or cysts
- Trabecular changes to bone (honeycombing)
- Labs: Diagnosis
- Pulmonary Function Testing
- Findings consistent with Interstitial Lung Disease
- Serum Angiotensin-converting enzyme (Serum ACE)
- Increased in 50-80% of Sarcoidosis patients
- Gallium scan
- Panda and lambda patterns
- Biopsy or Cytology (Gold standard)
- Finding
- Discrete noncaseating epithelioid granuloma
- Biopsy sites
- Transbronchial lung biopsy (preferred site)
- Bronchoalveolar lavage (CD4-CD8 ratio >3.5)
- Skin biopsy of lesion
- Palpable peripheral lymph node biopsy
- Salivary Gland biopsy
- Labs: Additional baseline for Sarcoidosis monitoring
- Serum Chemistry
- Serum Calcium
- Renal Function tests
- Liver Function Tests
- Urinalysis
- Electrocardiogram
- Ophthalmology evaluation
- Tuberculin Skin Test
- Associated Conditions
- Erythema Nodosum (suggests better prognosis)
- Associated with acute arthritis (Lofgren's Syndrome)
- Not associated with chronic arthritis
- Most common associated nonspecific skin sign
- Differential Diagnosis
- Lung conditions
- See Interstitial Lung Disease
- See Hilar Adenopathy
- Infections
- Tuberculosis
- Coccidiodomycosis
- Blastomycosis
- Aspergillosis
- Histoplasmosis
- Pneumocystis carinii
- Arthritic Conditions
- Rheumatoid Arthritis
- Rheumatic Fever
- Systemic Lupus Erythematosus
- Gonococcal Arthritis
- Spondyloarthropathy
- Skin Differential Diagnosis
- See Annular Lesion
- See Erythema Nodosum
- Papular lesions similar to Sarcoidosis
- Granulomatous Rosacea
- Acne Vulgaris
- Plaque-type lesions similar to Sarcoidosis
- Psoriasis
- Lichen Planus
- Nummular eczema
- Discoid Lupus Erythematosus
- Granuloma Annulare
- Cutaneous T-Cell Lymphoma
- Kaposi's Sarcoma
- Secondary Syphilis
- Reference
- Katta (2002) Am Fam Physician 65(8):1581-84
- Management: Pulmonary Sarcoid
- Indications
- Dyspnea
- Persistent cough
- Widespread debilitating disease
- First-line: Systemic Corticosteroids (e.g. Prednisone)
- Indications
- Stage 2 or 3 lung changes
- Efficacy
- Short term benefit in moderate lung disease
- Unclear whether disease-modifying effect
- Protocol
- Start Prednisone at 20 to 40 mg per day
- Evaluate at 1-3 months for response
- No response: Taper off over 4-6 weeks
- Response
- Taper Prednisone to 5-10 mg/day
- Continue Prednisone for total of 12 months
- Consider Osteoporosis Prevention
- See Corticosteroid Associated Osteoporosis
- Reference
- Paramothayan (2002) JAMA 287:1301-7
- (1999) Am J Respir Crit Care Med 160:736-55
- Other management options
- Cytotoxic agents
- Used as alternative or as adjunct to Prednisone
- Agents
- Methotrexate (Rheumatrex) 10-25 mg weekly
- Azathioprine (Imuran)
- Immunomodulators
- Chloroquine
- Hydroxychloroquine (Plaquenil)
- Thoracic surgery indications
- Life-threatening Hemoptysis (lung resection)
- End-stage pulmonary Sarcoidosis (lung transplant)
- Management: Extrapulmonary Sarcoid
- Ophthalmologic Sarcoidosis: Uveitis
- First line: Topical Corticosteroids
- Refractory cases
- Prednisone (preferred)
- Methotrexate
- Cutaneous Sarcoidosis
- Erythema Nodosum lesions: NSAIDs
- Sarcoid lesions
- Intralesional Corticosteroids (e.g. Kenalog 5/ml)
- Inject lesions q2-3 weeks
- Other agents
- Doxycycline
- Minocycline
- Oral Corticosteroid indications
- Lupus Pernio
- Severe or disfiguring lesions
- Neurosarcoidosis: Cranial or Peripheral Neuropathy
- First-line: Oral Corticosteroids (e.g. Prednisone)
- Other agents: Cyclosporine or Azathioprine
- Monitoring
- Monitoring tools at visits
- History and physical
- Chest XRay
- Spirometry
- Specific testing when indicated
- Stage I Sarcoidosis
- Start with evaluations every 6 months
- May space visits to every 12 months if stable
- No follow-up if off therapy and stable for 3 years
- Stage II to IV Sarcoidosis
- Start with evaluations every 3-6 months
- Continue visits indefinately
- Prognosis
- Overall mortality (from respiratory failure): 1-5%
- Factors suggestive of worse prognosis
- Onset after age 40 years
- Black race
- Chronic Hypercalcemia
- Specific higher risk organ involvement
- Neurologic involvement
- Skin involvement (Lupus Pernio)
- Cardiac involvement
- Eye involvement (Chronic Uveitis)
- Renal involvement (Nephrocalcinosis)
- Cystic bone lesions
- Involvement of nasal mucosa
- Progressive pulmonary fibrosis
- Remission within 2 years
- Type I: 80% remission rate
- Type II: 30-50% remission rate
- Type III: <20% remission rate
- References
- Klippel (1997) Primer Rheumatic Diseases, AF, p. 325-7
- Wilson (1991) Harrison's IM, McGraw-Hill, p.1463-9
- Belfer (1998) Am Fam Physician 58(9):2041-50
- Hsu (2001) Am Fam Physician 64(2):289-96
- Wu (2004) Am Fam Physician 70:312-22