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Y2S1B1

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Orthopaedic Disease
Features
RA   symmetric joint pattern; MCPs and PIPs...rarely distal joints; synovial membranes; inflammatory; extra-articular features  
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OA   weight bearing joints; asymmetric; DIPs  
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Pannus   chronic inflammatory tissue that erodes/invades joint  
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Essentials of Dx of Ankylosing Spondylitis   Chronic LB pain (worse in am); restriction of back/chest motion; inflammatory eye disease, SIJ abnormalities; elev. ESR; RF neg; HLA-B27; peripheral arthritis  
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Essentials of Dx of Rheumatoid Arthritis   insidious onset in sm joints; x-rays joint erosions/narrowing; RF+; extra-articular manifestations (Rhematoid nodules, Sjogren's, Felty's, vasculitis, rheumatoid lung, cardiac disease, neuromyopathy, inflammatory eye disease, osteoporosis)  
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Schirmer's Test   detect tear production in pts with autoimmune disease involving exocrine glands (salivary/lacrimal); Sjogren's Syndrome  
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Rheumatoid nodules   100% RF+  
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Schober's Test   used for ankylosing spondylitis for measuring restriction of motion of lumbar spine  
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Essentials of Dx of Psoriatic Arthritis   Psoriasis precedes arthritis in 80%; asymmetric arthritis w/sausage digits incl DIP joints; RF neg; SIJ involvement w/ankylosis; x-ray (osteolysis, pencil-in-cup deformity, lack of osteoporosis); enthesopathy (at soft tissue attachment to bone/joint)  
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"Classic" Psoriatic Arthritis   DIP arthritis with nail change  
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"Common" Psoriatic Arthritis   asymmetric oligoarthritis  
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Essentials of Dx of Reactive/Reiter's Arthritis   50-80% HLA-B27+; oligoarthritis; conjunctivitis; urethritis; mouth ulcers; usually follows dysentery or and STD  
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Essentials of Dx of Septic Arthritis   Sudden acute onset of MONOARTHRITIS (lg WB joints/wrist); compromised pts - IVDA/preexisting arthritis; infections in body (N.gonorrhea, S.aureus, S.pyogenes, G-bacilli (e.coli, salmonella, pseudomonas), Hemophilus); no dermatitis or tenosynovitis  
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Class I Joint Effusion   Class I: normal/OA; String sign = string; normal viscosity  
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Class II Joint Effusion   relatively high WBC count; INFLAMMATORY; fluid behaves like water (broken down hyluronic acid); not viscous  
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Class III Joint Effusion   precipitate forms; SEPTIC  
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Hemorrhagic Joint Effusion   sickle cell disease or trauma  
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Synovial Fluid Analysis   1. Gram Stain!! 2. Culture!!  
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Essentials of Dx of Gonococcal Septic Arthritis   Young Healthy Women; Sexually active; Migratory polyarthralgias; Characteristic skin lesion/rash; TENOSYNOVITIS; negative blood/synovial cultures  
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Normal Synovial Fluid   clear; <1mL; high viscosity; <200 WBCs; <25% PMN cells  
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Osteoarthritic Synovial Fluid   clear; 1-10mL; high viscosity; 200-10,000 WBCs; <50% PMN cells  
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Rheumatic/Inflammatory Arthritic Synovial Fluid   opaque; 5-50mL; low viscosity; 5,000-75,000 WBCs; >50% PMN cells  
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Septic Arthritic Synovial Fluid   opaque; 5-50mL; low viscosity; >50,000 WBCs; >75% PMN cells  
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Spinal Septic Arthritis (Discitis)   chronic unrelenting back pain/fever/local tenderness in THORACOLUMBAR region; infx crosses joint space like (unlike malignancy); TB infx--> POTT'S Disease in T10-L2  
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Hepatitis A associated musculoskeletal syndromes   transient arthralgias  
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HBV-associated musculoskeletal syndromes   abrupt, symm, severe polyarthritis in prodrome; migradory or additive; variety of rashes; cryoglobulinemia; 1% develop PAN  
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HCV-associated musculoskeletal syndromes   acute arthritis is RARE!!; Sjogren's syndrome  
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Lyme Disease   Borrelia burgdorferi  
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Stage 1 Lyme Disease   erythema chronica migrans; flu-like symptoms  
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Stage 2 Lyme Disease   systemic symptoms; cardiac/neurologic symptoms (Bell's Palsy); attacks of arthritis (50%)  
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Stage 3 Lyme Disease   chronic arthritis (like RA); endarteritis; chronic CNS infection  
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Dx of Lyme Disease   IgM - actue and IgG - chronic; ELISA and confirmatory western blot  
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Tx of Lyme Disease   early/acute - antibiotics; Chronic - IV antibiotic and synovectomy  
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Jones Criteria for Rheumatic Fever Dx   Dx requires 2 major or 1 major/2minor, plus evidence of recent strep (GAS) infx  
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Minor Jones Criteria for Rheumatic Fever   prior ARF of RHD, arthralgias, fever, enc ESR and CRP, leukocytosis, prolonged PR  
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Major Jones Criteria for Rheumatic Fever   arthritis, carditis, chorea, erythema marginatum, nodules  
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HIV-Associated Rheumatic Disease   oligoarticular in lower expremities; short lived; spondylarthropathy resembles psoriatic arthritis, Reactive/Reiter's, Enthesopathy; HIV+, but Negative for ANA/RF/anit-Ro/anti-La  
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Diagnostic imaging in bacterial arthritis   x-rays, bone scan, CT (extent of SIJ or SCJ sepsis), MRI anthrography  
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Essentials of Diagnosis for Septic Arthritis   1. sudden onset of acute monoarticular arthritis in large WB joints; 2. Previous joint damage or IV drug use; 3. Infection; 4. Large joint effusions with WBC >50,000  
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Hyperuricemia/Gout   a. Mid-age M, 90% d/t underexcretion of uric acid from kidney dysfxn (rather than overproduction), attack d/t sudden change in urate levels; Pain reaches max abruptly and can subside spontaneously in 1wk-2mo; Classically involves only 1 joint (podagra)  
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Calcium pyrophosphate deposition disease   a. Elderly, “pseudogout” of knee, shoulder, wrist, MCPs; linear chondrocalcinosis; Inflammatory, rhomboid weakly birefringent crystals  
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Basic calcium phophate crystal disease   inflammatory arthritis  
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Calcium oxalate crystals   acute arthritis  
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Liquid lipid crystals   acute arthritis  
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Osteoarthritis   Secondary to other articular dx, deg loss of cartilage/bony joint changes, no systemic probs, pain w/activity not at rest (only brief am stiffness), min inflam; Herberden’s nodes - DIP, Bouchard’s nodes - PIP; if pt has acute flare, suggest other Dx!  
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OA findings   b. X-ray (narrow joint space, osteophytes, inc subchondral bone density, bone cysts), normal/cool joint effusions and ESR; Joint proprioception can be destroyed by syphilis or diabetes  
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OA Treatment   a. No cure; pain control, improve function, enhance quality of life; SYNVISC viscosupplementation  
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Diffuse idiopathic skeletal hyperostosis (DISH)   a. subtype of OA; M>F, >50yo, Candle wax appearance of vertebral osteophytes btw 3-4 segments; Preservation of disc space, ligamentous calcification  
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SLE...again   a. Malar rash, discoid rash, pleural effusions, heart problems, lupus nephritis, arthritis, raynauds phenomenon; Uncontrolled autoantibody response to endogenous material instead of external infections  
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Drug-induced SLE   a. If you take pt off drug (hydralazine, procainamide, etc), it goes away; ANA is definitive!, anti-histone  
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Raynaud's phenomenon   a. Color changes: blanching, cyanosis, reactive hypercemia; pain precipitated by emotional/environmental stress; Primary - monotonous pattern in young women; Secondary - irregular capillary patterns  
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Scleroderma/PSS   a. Characterized by multisystem involvement; skin (raynauds and sclerydactyly) renal, cardiac, pulmonary, musculoskeletal, GI); ANA, anti-Scl 70, anti-histone  
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Limited scleroderma/CREST syndrome   a. Calcinosis, raynauds, esophageal constricture, sclerodactyly, telangectasias; Lacks proximal scleroderma  
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Inflammatory muscle disease (polymyositis/dermatomyositis)   a. Symmetric proximal muscle weakness (hip/shoulder), “shawl” sign, Grotton’s patches, heliotope (darkness on eyelid), periungal erythema  
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Sjogren's disease   a. Parotid gland swelling, Keratitis sicca (dry eyes, mouth, vagina); Schirmers test of lacrimal gland fxn, RF, anti-Ro, anti-La  
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Fibromyalgia   a. F 7x>M: 20-50yo, multiple tenderpoints, widespread pain >3months, fatigue, headaches, numbness, elev Substance P; Exercise, antidepressants  
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Henoch-Schoelein Purpura   a. Small vessels; Palpable purpura, kids, serum sickness  
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Essential mixed cryoglobulinemia   a. Small vessels; IgG-IgM complexes with RF activity; sediments with cold; Associated with HBV and HCV  
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Polyarteritis nodosa (PAN)   a. Small-medium vessel; Significant weight loss, livedo reticularis, testicular pain, myalgias, weakness, tenderness, mono/polyneuropathy, hypertension, BUN-kidneys, abnml arteriogram (mesenteric aa)  
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Churg-Strauss Disease   a. Small-medium vessel; Asthma, eosinophilia (in biopsy too), mono/polyneuropathy, pulmonary infiltrates, sinus probs  
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Wegener's Granulomatosis   a. Small-medium vessel; Oral/nasal inflam, nodules on chest x-ray; Granulomatous inflame on biopsy, C-ANCA, hematauria  
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Takayasu's Arteritis   "Pulseless Disease;" a. Large vessel; <40yo, claudication of extremities…weakness w/walking, dec brachial a pulse, BP difference in arms, subclavian a bruits, abnormal arteriogram  
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Temporal Arteritis   Multi-nuclear giant cell arteritis; a. Large vessel; >50yo, temporal a., ESR>50; Treat aggressively to prevent blindness  
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Erythema Nodosum   panniculitis/fat; a. Sarcoidosis, CT disease, Lupus, Inflam bowel disease, TB, strep infx  
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Behcet's Disease   panniculitis; a. HLA-B5, Japanese, Turkish; Mouth ulcer, arthritis, cut vasculitis, phlebitis, arteritis, meningoencephalitis  
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Relapsing polychondritis   panniculitis; a. Cartilage becomes inflamed and dies; Most common: ear, nose, joints  
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Osteoporosis type-I   spine; a. W, 15-20yrs post-menopausal, trabecular bone fx in distal radius and vertebrae…estrogen is major player  
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Osteoporosis type-II   spine and hip; a. F 2x>M, >70yo; Cortical and trabecular bone fx in hip, pelvis, humerus  
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Osteonecrosis/AVN   ASEPTIC: Alcohol, Steroids-sickle cell-storage diseases, Emboli-fat/cholesterol, Post-radiation necrosis, Trauma, Idiopathic, Connective tissue disease-SLE-Caisson; Symptomatic tx, arthroplasty, joint replacement  
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Osteomyelitis   Infxn, neutrophils, pus, intraosseous pressure, dec flow, necrosis, sequestra; Chonic vs acute: bacteria presence, necrosis, x-ray findings; Babies-staph/strep; Adults-staph; Elderly-G-s; Bone scan sensitive; Prophylax b/f surgery or IV 4-6wks w/debride  
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JRA - Systemic onset   < 5yo, 1+ joints, young onset=poor health (? remission, 1/3 prog arthritis, amyloidosis); Spiking fever, arthritis/algias, adenopathy, myalgia, malaise, hepatosplenomegaly, serositis, hepatitis, anemia, rash  
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JRA - systemic onset tests/Tx   ESR, anemia, leukocytosis (inc PMN), thrombocytosis; Splint, PT, NSAIDs  
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JRA - pauciarticular/oligoarticular type I - Younger group   F>M, <6yo, 4+ joints, good prognosis (remissions, altered growth, eye); ANA; Splint, PT, NSAIDs, eye tx  
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JRA - pauciarticular type II - Older Juvenile Spondylarthropathy   M>F, >9yo, 66% ok (hip, cervical, spondylitis); Lower limbs, enthesopathies (insertion site), iritis, SIJ pain; Shober’s test, HLA-B27; PT, NSAIDs  
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JRA - Pauciarticular Type III - Psoriatic   F>M, ~8yo; Dactylitis, asymmetric, nail pitting, onycholysis, psoriatic rash, family Hx; Ok prognosis can relapse into adulthood (spondylitis, iritis); ESR varies w/number of joints; Splint, PT, NSAIDs, (DMARDs), biologics  
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JRA - Polyarticular RF-Negative   F>M, 5+ joints, variable prognosis; Prayer sign, dec neck/TMJ ROM, flexor tenosynovits, fever, Felty’s; ESR, anemia, leukocytosis, thrombocytosis; Splint, PT, NSAIDs, DMARDs, biologics  
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JRA - Polyarticular RF-Positive   F>M; >8yo, 5+ joints, poor prognosis; Rheum nodules, C1-C2 sublux, amyloidosis; ESR, RF+, HLA-DR4, erosive changes on x-ray; Splint, PT, NSAIDs, DMARDs, biologics, surgery  
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Joints specific to RA   TMJ, SC joint, AC joint, elbow, wrist, MCP, ankles, subtalar joint, MTPs  
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Joints specific to OA   shoulder, lumbar spine, hip, 1st CMC, DIP  
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Diagnostic RA Criteria   stiff in am >1hr in 3+ symm swelling >6wks; neuromyopathy (interosseous m atrophy, C1-C2 sublux, carpal tunnel, bladder fxn, jumping legs, dec motor power); osteoporosis (erosions/osteopenia on x-ray w/joint sp narrow); amyloidosis - death in JRA  
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Remission Criteria for RA   >5 criteria for >2wks; am stiff <15min; no fatigue, joint pain/tenderness; ESR <30M, <20F  
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DMARD   disease modifying anti-rheumatic drug; methotrexate is being replaced by leflunomide  
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anti-TNFalpha   biologic agent for RA; injection site rxn...can activate latent TB!!  
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Growing pains in kids   6-13 yo; localized pain in calves, thighs and shins...NOT in joints  
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osteoporotic fractures   40% of F >50 will fx in their lifetime; Bone scan T-scores of >-2.5  
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Infected Joint Prostheses   1-5% of joint replacements; insidious onset of pain and loosening; S.aureus, S, epidermidis; prevention via prophylaxis prior to invasive dental, GI or GU procedures  
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