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===Appearance of the Patient===
===Appearance of the Patient===
*Patient appears well in the earlier stages of the disease
* Patient with [[septic arthritis]] usually appears [[toxic]] and with [[joint pain]]
*Patient appears ill in the late stages of the disease due to multi-organ involvement
* children usually appear [[irritable]]
===Vital Signs===
*[[Fever]] higher than 38 after the exclusion of [[infection]]
*[[Tachycardia]]/[[bradycardia]] depends on the accompanying complication
*[[Tachypnea]]/[[bradypnea]] depends on the accompanying complication


=== Skin<ref name="pmid25077888">{{cite journal |vauthors=Parodi A, Cozzani E |title=Cutaneous manifestations of lupus erythematosus |journal=G Ital Dermatol Venereol |volume=149 |issue=5 |pages=549–54 |year=2014 |pmid=25077888 |doi= |url=}}</ref><ref name="pmid26985173">{{cite journal |vauthors=Szczęch J, Rutka M, Samotij D, Zalewska A, Reich A |title=Clinical characteristics of cutaneous lupus erythematosus |journal=Postepy Dermatol Alergol |volume=33 |issue=1 |pages=13–7 |year=2016 |pmid=26985173 |pmc=4793050 |doi=10.5114/pdia.2014.44031 |url=}}</ref><ref name="pmid19824738">{{cite journal |vauthors=Walling HW, Sontheimer RD |title=Cutaneous lupus erythematosus: issues in diagnosis and treatment |journal=Am J Clin Dermatol |volume=10 |issue=6 |pages=365–81 |year=2009 |pmid=19824738 |doi=10.2165/11310780-000000000-00000 |url=}}</ref> ===
=== Vital Signs ===
*[[Cyanosis]]
* Low grade [[fever]]. [[Chills]] and spiking fever are very rare.
**Secondary to [[respiratory]] complications
* [[Hyperthermia]] over the joint involved
*[[Jaundice]]
* [[Tachycardia]]
**Secondary to [[hepatitis]]
* [[Tachypnea]]
*[[Pallor]]
**Secondary to [[anemia]]
*Generalised [[erythema]]
*[[Bruises]]
**Secondary to [[thrombocytopenia]]
*[[Urticaria]]
*[[Bullous|Bullous lesions]]
*[[Sclerodactyly]]
*Skin [[Ulcerations|ulceration]]
*[[Malar rash]]: the classic lupus ‘butterfly’ rash
** [[Erythema|Erythematous]], elevated [[Lesions|lesion]], [[Pruritis|pruritic]] or painful, in a [[malar]] distribution, commonly precipitated by exposure to sunlight
* Annular or psoriasiform skin [[lesions]]
** Small, [[erythematous]], slightly scaly [[papules]] that evolve into either a psoriasiform (papulosquamous) or annular form and tend to involve shoulders, forearms, neck, and upper torso
* [[Scarring]] [[chronic]] [[alopecia]]
** Mostly present on face, neck, and scalp
* [[Telangiectasias]]
* Dyspigmentation ([[hyperpigmentation]] or [[hypopigmentation]]) of skin in [[scar]] places
* Follicular plugging
** Discrete, [[erythematous]], slightly infiltrated [[plaques]] covered by a well-formed adherent scale that extends into dilated [[hair follicles]]
* [[Nodules]]
** Can be firm (Lupus profundus) and painful
* Photodistributed [[lesions]] with chronic pink indurated plaques or broad [[lesions]] that are slow to heal (more seen in lupus tumidus)
* Thin hair that easily fractures (lupus hair)
* Irregularly shaped raised white plaques, areas of erythema, silvery white scarred [[lesions]], and [[ulcers]] with surrounding [[erythema]] on the soft or hard palate or buccal [[mucosa]]
* Periungual [[erythema]]
** Dilated tortuous loops of [[capillaries]] and a prominent subcapillary venous plexus along
** Involves the base of the nail and edges of the upper [[eyelid]]
[[File:Systemic lupus erythematosus 055.jpg|300px]]
'''For more pictures of the rash presentation in lupus, click [[Systemic lupus eryhthematosus physical examination:Gallery|here]].'''


===HEENT===
=== Skin ===
*[[Ophthalmology]]<ref name="pmid26367085">{{cite journal |vauthors=Preble JM, Silpa-archa S, Foster CS |title=Ocular involvement in systemic lupus erythematosus |journal=Curr Opin Ophthalmol |volume=26 |issue=6 |pages=540–5 |year=2015 |pmid=26367085 |doi=10.1097/ICU.0000000000000209 |url=}}</ref><ref name="pmid25904124">{{cite journal |vauthors=Silpa-archa S, Lee JJ, Foster CS |title=Ocular manifestations in systemic lupus erythematosus |journal=Br J Ophthalmol |volume=100 |issue=1 |pages=135–41 |year=2016 |pmid=25904124 |doi=10.1136/bjophthalmol-2015-306629 |url=}}</ref>
* Warmth over the joint
**[[Nystagmus]]
**Visual [[Retinal|retinal changes]] from systemic lupus erythematosus cytoid bodies, [[Retina|retinal]] [[haemorrhages]], serous exudate or [[haemorrhage]] in the [[choroid]], [[optic neuritis]] (not due to [[hypertension]], drugs or [[infection]])
**[[Cataract]]
**[[Optic nerve atrophy]]
**[[Icterus|Icteric sclera]]
**[[Cotton wool spots]] in the [[retina]] in [[Ophthalmoscopy|ophthalmoscopic exam]]
*Nasal [[ulcers]]<ref name="pmid1526055">{{cite journal |vauthors=Robson AK, Burge SM, Millard PR |title=Nasal mucosal involvement in lupus erythematosus |journal=Clin Otolaryngol Allied Sci |volume=17 |issue=4 |pages=341–3 |year=1992 |pmid=1526055 |doi= |url=}}</ref>
**Mostly painless
**Mostly in lower [[nasal septum]] and [[bilateral]] and parallel
**Nasal perforation secondary to [[vasculitis]] may happen rarely
*Oral [[ulcers]]<ref name="pmid23780804">{{cite journal |vauthors=Anyanwu CO, Ang CC, Werth VP |title=Oral mucosal involvement in bullous lupus |journal=Arthritis Rheum. |volume=65 |issue=10 |pages=2622 |year=2013 |pmid=23780804 |pmc=4333153 |doi=10.1002/art.38051 |url=}}</ref><ref name="pmid23248469">{{cite journal |vauthors=Ranginwala AM, Chalishazar MM, Panja P, Buddhdev KP, Kale HM |title=Oral discoid lupus erythematosus: A study of twenty-one cases |journal=J Oral Maxillofac Pathol |volume=16 |issue=3 |pages=368–73 |year=2012 |pmid=23248469 |pmc=3519212 |doi=10.4103/0973-029X.102487 |url=}}</ref>
**Mostly painless
**White plaques with areas of [[erythema]], or punched-out erosions or ulcers with surrounding [[erythema]] on the soft or hard palate or [[buccal mucosa]]


===Neck<ref name="pmid19107085">{{cite journal |vauthors=Melikoglu MA, Melikoglu M |title=The clinical importance of lymphadenopathy in systemic lupus erythematosus |journal=Acta Reumatol Port |volume=33 |issue=4 |pages=402–6 |year=2008 |pmid=19107085 |doi= |url=}}</ref><ref name="pmid24722263">{{cite journal |vauthors=Sacre K, Escoubet B, Pasquet B, Chauveheid MP, Zennaro MC, Tubach F, Papo T |title=Increased arterial stiffness in systemic lupus erythematosus (SLE) patients at low risk for cardiovascular disease: a cross-sectional controlled study |journal=PLoS ONE |volume=9 |issue=4 |pages=e94511 |year=2014 |pmid=24722263 |pmc=3983200 |doi=10.1371/journal.pone.0094511 |url=}}</ref>===
* [[Erythema]] over the around the joint that involved
*[[Jugular venous distension]]
* [[Disseminated gonococcal infection]] often present with [[skin]] lesions, typically multiple, painless [[macules]] and [[papules]], most often found on the arms or legs or on the [[trunk]].<ref name="pmid9449882">Goldenberg DL (1998) [https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&retmode=ref&cmd=prlinks&id=9449882 Septic arthritis.] ''Lancet'' 351 (9097):197-202. [http://dx.doi.org/10.1016/S0140-6736(97)09522-6 DOI:10.1016/S0140-6736(97)09522-6] PMID: [https://pubmed.gov/9449882 9449882]</ref>
**Secondary to [[hypertension]] and cardiac complications
*[[Lymphadenopathy]]  
** [[Lymph node|Lymph nodes]] are soft, non-tender, discrete
** Usually detected in the [[cervical]], [[axillary]], and [[inguinal]]


===Lungs<ref name="pmid21194884">{{cite journal |vauthors=Torre O, Harari S |title=Pleural and pulmonary involvement in systemic lupus erythematosus |journal=Presse Med |volume=40 |issue=1 Pt 2 |pages=e19–29 |year=2011 |pmid=21194884 |doi=10.1016/j.lpm.2010.11.004 |url=}}</ref><ref name="pmid26550810">{{cite journal |vauthors=Salvati F |title=[The involvement of pulmonary interstitial tissue in multisystemic lupus erythematosus: interdisciplinarity and role of the pneumologists] |language=Italian |journal=Clin Ter |volume=166 |issue=5 |pages=205–7 |year=2015 |pmid=26550810 |doi= |url=}}</ref><ref name="pmid25639532">{{cite journal |vauthors=Alamoudi OS, Attar SM |title=Pulmonary manifestations in systemic lupus erythematosus: association with disease activity |journal=Respirology |volume=20 |issue=3 |pages=474–80 |year=2015 |pmid=25639532 |pmc=4418345 |doi=10.1111/resp.12473 |url=}}</ref>===
=== Extremities ===
*Fine and coarse [[crackles]] upon auscultation of the [[lung]]
Most commonly involves [[knee]] > [[hip]] > [[shoulder]] > [[ankle]].<ref name="pmid3498362">Barton LL, Dunkle LM, Habib FH (1987) [https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&retmode=ref&cmd=prlinks&id=3498362 Septic arthritis in childhood. A 13-year review.] ''Am J Dis Child'' 141 (8):898-900. PMID: [https://pubmed.gov/3498362 3498362]</ref> Other joints such as [[sacroiliac joint]] (~10%), [[sternoclavicular]] or costoclavicular joints may be involved in patient with history of intravenous drug abuse (IVDA), penetrating trauma, animal or human bites and local [[steroid]] [[injections]].
**May be due to [[pneumonitis]]
* [[Swelling]] of the joint that involved
*In case of [[pleural effusion]]:
* Decreased [[range of motion]] such as pseudo paralysis
**Asymmetric [[tactile fremitus]]
* Patient hold the hip in flexed and externally rotated position if SA involving [[hip]].
**Asymmetric [[chest expansion]]
* If child, unwillingness to bear weight on the affected joint (antalgic gait)
 
===Heart<ref name="pmid24790989">{{cite journal |vauthors=Mak A, Kow NY |title=Imbalance between endothelial damage and repair: a gateway to cardiovascular disease in systemic lupus erythematosus |journal=Biomed Res Int |volume=2014 |issue= |pages=178721 |year=2014 |pmid=24790989 |pmc=3984775 |doi=10.1155/2014/178721 |url=}}</ref><ref name="pmid24722263">{{cite journal |vauthors=Sacre K, Escoubet B, Pasquet B, Chauveheid MP, Zennaro MC, Tubach F, Papo T |title=Increased arterial stiffness in systemic lupus erythematosus (SLE) patients at low risk for cardiovascular disease: a cross-sectional controlled study |journal=PLoS ONE |volume=9 |issue=4 |pages=e94511 |year=2014 |pmid=24722263 |pmc=3983200 |doi=10.1371/journal.pone.0094511 |url=}}</ref><ref name="pmid23052654">{{cite journal |vauthors=Canpolat N, Kasapcopur O, Caliskan S, Gokalp S, Bor M, Tasdemir M, Sever L, Arisoy N |title=Ambulatory blood pressure and subclinical cardiovascular disease in patients with juvenile-onset systemic lupus erythematosus |journal=Pediatr. Nephrol. |volume=28 |issue=2 |pages=305–13 |year=2013 |pmid=23052654 |doi=10.1007/s00467-012-2317-3 |url=}}</ref>===
*Chest [[tenderness]] or discomfort upon palpation
**May be due to [[costochondritis]]
*[[Diastolic murmurs|Diastolic murmur]], or [[Systolic murmurs|systolic murmur]] >3/6 due to [[valvular disease]]
*Loud second heart sound (due to [[pulmonary hypertension]])
*Loud S1-S2 due to [[cardiomegaly]]
*Decrease heart sounds if associated with [[pericardial effusion]]
 
===Abdomen<ref name="pmid20572299">{{cite journal |vauthors=Tian XP, Zhang X |title=Gastrointestinal involvement in systemic lupus erythematosus: insight into pathogenesis, diagnosis and treatment |journal=World J. Gastroenterol. |volume=16 |issue=24 |pages=2971–7 |year=2010 |pmid=20572299 |pmc=2890936 |doi= |url=}}</ref><ref name="pmid27329649">{{cite journal |vauthors=Alves SC, Fasano S, Isenberg DA |title=Autoimmune gastrointestinal complications in patients with systemic lupus erythematosus: case series and literature review |journal=Lupus |volume=25 |issue=14 |pages=1509–1519 |year=2016 |pmid=27329649 |doi=10.1177/0961203316655210 |url=}}</ref><ref name="pmid27055518">{{cite journal |vauthors=Fawzy M, Edrees A, Okasha H, El Ashmaui A, Ragab G |title=Gastrointestinal manifestations in systemic lupus erythematosus |journal=Lupus |volume=25 |issue=13 |pages=1456–1462 |year=2016 |pmid=27055518 |doi=10.1177/0961203316642308 |url=}}</ref><ref name="pmid28523968">{{cite journal |vauthors=Li Z, Xu D, Wang Z, Wang Y, Zhang S, Li M, Zeng X |title=Gastrointestinal system involvement in systemic lupus erythematosus |journal=Lupus |volume= |issue= |pages=961203317707825 |year=2017 |pmid=28523968 |doi=10.1177/0961203317707825 |url=}}</ref>===
*[[Abdominal distention]]
*[[Ascites]]
**Due to [[nephrotic syndrome]]
*[[Abdominal pain]]
**Due to [[Vasculitis|mesentric vasculitis]]
*[[Hepatomegaly]]
*[[Splenomegaly]]
*Costo-vertebral angle tenderness
 
===Extremities<ref name="pmid15580980">{{cite journal |vauthors=Zoma A |title=Musculoskeletal involvement in systemic lupus erythematosus |journal=Lupus |volume=13 |issue=11 |pages=851–3 |year=2004 |pmid=15580980 |doi=10.1191/0961203303lu2021oa |url=}}</ref><ref name="pmid22956550">{{cite journal |vauthors=Gabba A, Piga M, Vacca A, Porru G, Garau P, Cauli A, Mathieu A |title=Joint and tendon involvement in systemic lupus erythematosus: an ultrasound study of hands and wrists in 108 patients |journal=Rheumatology (Oxford) |volume=51 |issue=12 |pages=2278–85 |year=2012 |pmid=22956550 |doi=10.1093/rheumatology/kes226 |url=}}</ref><ref name="pmid19591780">{{cite journal |vauthors=Grossman JM |title=Lupus arthritis |journal=Best Pract Res Clin Rheumatol |volume=23 |issue=4 |pages=495–506 |year=2009 |pmid=19591780 |doi=10.1016/j.berh.2009.04.003 |url=}}</ref><ref name="pmid24862229">{{cite journal |vauthors=Zhu KK, Xu WD, Pan HF, Zhang M, Ni J, Ge FY, Ye DQ |title=The risk factors of avascular necrosis in patients with systemic lupus erythematosus: a meta-analysis |journal=Inflammation |volume=37 |issue=5 |pages=1852–64 |year=2014 |pmid=24862229 |doi=10.1007/s10753-014-9917-y |url=}}</ref><ref name="pmid23731640">{{cite journal |vauthors=Voulgari PV, Kosta P, Argyropoulou MI, Drosos AA |title=Avascular necrosis in a patient with systemic lupus erythematosus |journal=Joint Bone Spine |volume=80 |issue=6 |pages=665 |year=2013 |pmid=23731640 |doi=10.1016/j.jbspin.2013.03.018 |url=}}</ref>===
*[[Clubbing]]
*[[Cyanosis]]
*[[Muscle weakness|Muscle atrophy or weakness]]
*[[Livedo reticularis]]
**Reddish-cyanotic, reticular pattern on the skin of the arms, legs, and torso, particularly with cold exposure
*[[Arthritis]]
**Symmetrical
**Polyarticular
**Mostly involve knees, carpal joints, and joints of the fingers, especially the proximal [[interphalangeal]] (PIP) joint
**Decrease  range of motion in affected joints
*Joints [[erythema]]
**Due to [[synovitis]]
*Joint effusion
*Muscle [[atrophy]]
*[[Fasciculations]] in the upper/lower extremity
*[[Claudication]]
*Loss of digit or limb
 
===Neuromuscular<ref name="pmid19366083">{{cite journal |vauthors=Cojocaru IM, Cojocaru M, Tănăsescu R, Burcin C, Atanasiu AN, Silosi I |title=Detection of autoantibodies to ribosome P in lupus patients with neurological involvement |journal=Rom J Intern Med |volume=46 |issue=3 |pages=239–42 |year=2008 |pmid=19366083 |doi= |url=}}</ref><ref name="pmid22594009">{{cite journal |vauthors=Madrane S, Ribi C |title=[Central neuropsychiatric involvement in systemic lupus erythematosus] |language=French |journal=Rev Med Suisse |volume=8 |issue=337 |pages=848–53 |year=2012 |pmid=22594009 |doi= |url=}}</ref><ref name="pmid7555923">{{cite journal |vauthors=Sivri A, Hasçelik Z, Celiker R, Başgöze O |title=Early detection of neurological involvement in systemic lupus erythematosus patients |journal=Electromyogr Clin Neurophysiol |volume=35 |issue=4 |pages=195–9 |year=1995 |pmid=7555923 |doi= |url=}}</ref><ref name="pmid19217587">{{cite journal |vauthors=Juncal Gallego L, Almuíña Simón C, Muíños Esparza LF, Díaz Soto R, Ramil Fraga C, Quiroga Ordóñez E |title=[Systemic lupus erythematosus with fulminant neurological involvement] |language=Spanish; Castilian |journal=An Pediatr (Barc) |volume=70 |issue=2 |pages=202–4 |year=2009 |pmid=19217587 |doi=10.1016/j.anpedi.2008.09.009 |url=}}</ref>===
*Patient is usually oriented to persons, place, and time based on the disease course
*[[Cognitive impairment]]
*[[Hallucination|Hallucinations]]
**[[Visual hallucinations|Visual]]
**[[Auditory hallucinations|Auditory]]
*Memory deficit
**Loose associations
**Impoverished thought content
**Illogical thinking
**Bizarre disorganised or catatonic behaviour


</div>}}
</div>}}

Revision as of 19:49, 9 April 2018

Septic arthritis resident survival guide:

Complete diagnostic approach:

Common Presentation

Symptoms in newborns or infants:

  • Cries when infected joint is moved (e.g. diaper change causes crying if hip joint is infected)
  • Fever
  • Inability to move the limb with the infected joint (pseudoparalysis)
  • Irritability

Symptoms in children and adults:

Less common Presentation

 
 
 
 
 
 
 
 

Focused History

  • Intravenous drug use
  • Sexual activity
  • Terminal complement deficiency
  • Dog or cat bite
  • Ingestion of unpasteurized dairy products
  • Nail through shoe
  • Soil exposure/gardening
  • Soil or dust exposure containing decomposed wood

(north-central and southern United States)

  • Southwestern United States, Central and South America

(primary respiratory illness)

  • Cleaning fish tank
 
 
 
 
 
 
 
 

Physical Examination

Appearance of the Patient

Vital Signs

Skin

  • Warmth over the joint

Extremities

Most commonly involves knee > hip > shoulder > ankle.[2] Other joints such as sacroiliac joint (~10%), sternoclavicular or costoclavicular joints may be involved in patient with history of intravenous drug abuse (IVDA), penetrating trauma, animal or human bites and local steroid injections.

  • Swelling of the joint that involved
  • Decreased range of motion such as pseudo paralysis
  • Patient hold the hip in flexed and externally rotated position if SA involving hip.
  • If child, unwillingness to bear weight on the affected joint (antalgic gait)
 
 
 
 
 
 
 
 

Laboratory Workup

 
 
 
 
 
 
 
 

Imaging Study

Plain radiographs of swollen joints

  • Erosions

Ultrasonography of painful joints

  • Detect synovitis and tenosynovitis in the hands and wrists in patients with SLE

Renal ultrasonography

  • To assess kidney size
  • To rule out urinary tract obstruction

Chest radiography

  • For suspected pleural effusion, interstitial lung disease, cardiomegaly

Echocardiography

  • For suspected pericardial involvement, to assess for a source of emboli, or noninvasive estimation of pulmonary artery pressure; and for evaluation of suspected valvular lesions, such as verrucae

Computed tomography (CT)

  • For abdominal pain, suspected pancreatitis, interstitial lung disease

Magnetic resonance imaging (MRI)

  • For focal neurologic deficits or cognitive dysfunction
 
 
 
 
 
 
 
 

Other Investigation

Bronchoscopy

Fiberoptic bronchoscopy with bronchoalveolar lavage (BAL) and transbronchial lung biopsies:[3][4]

  • To substantiate the diagnosis of alveolar hemorrhage

Barium swallow or esophagography

Biopsy

  • Renal biopsies:[6][7]
    • Determining the degree of renal involvement
    • Delineating treatment decisions and prognosis in certain clinical scenarios
    • Assess activity and damage (i.e., chronicity)
    • Helping with classification

Paracentesis

Arthrocentesis

  • In the presence of joint effusion to differentiate between different causes of arthritis[12]
 
 
  1. Goldenberg DL (1998) Septic arthritis. Lancet 351 (9097):197-202. DOI:10.1016/S0140-6736(97)09522-6 PMID: 9449882
  2. Barton LL, Dunkle LM, Habib FH (1987) Septic arthritis in childhood. A 13-year review. Am J Dis Child 141 (8):898-900. PMID: 3498362
  3. Shen M, Wang Y, Xu WB, Zeng XJ, Zhang FC (2005). "[Pleuropulmonary manifestations of systemic lupus erythematosus]". Zhonghua Yi Xue Za Zhi (in Chinese). 85 (48): 3392–5. PMID 16409858.
  4. Susanto I, Peters JI (1997). "Acute lupus pneumonitis with normal chest radiograph". Chest. 111 (6): 1781–3. PMID 9187214.
  5. 5.0 5.1 Jiménez-Alonso J, Estev D, Vera C, Sabio JM (2003). "Dysphagia in patients with systemic lupus erythematosus". Lupus. 12 (6): 493. PMID 12873055.
  6. Giannico G, Fogo AB (2013). "Lupus nephritis: is the kidney biopsy currently necessary in the management of lupus nephritis?". Clin J Am Soc Nephrol. 8 (1): 138–45. doi:10.2215/CJN.03400412. PMID 22977215.
  7. Singh A, Ghosh R, Kaur P, Golay V, Pandey R, Roychowdhury A (2014). "Protocol renal biopsy in patients with lupus nephritis: a single center experience". Saudi J Kidney Dis Transpl. 25 (4): 801–7. PMID 24969191.
  8. Salomone E, Tamburino C, Bruno G, Di Paola R, Silvestri F (1989). "The role of endomyocardial biopsy in the diagnosis of cardiac involvement in systemic lupus erythematosus". Heart Vessels. 5 a (1): 52–3. PMID 2684953.
  9. Prasad S, Abujam B, Lawrence A, Aggarwal A (2012). "Massive ascites as a presenting feature of lupus". Int J Rheum Dis. 15 (1): e15–6. doi:10.1111/j.1756-185X.2011.01659.x. PMID 22324961.
  10. Palavutitotai N, Buppajarntham T, Katchamart W (2014). "Etiologies and outcomes of pleural effusions in patients with systemic lupus erythematosus". J Clin Rheumatol. 20 (8): 418–21. doi:10.1097/RHU.0000000000000179. PMID 25417677.
  11. Kruzliak P, Novak M, Piler P, Kovacova G (2013). "Pericardial involvement in systemic lupus erythematosus: current diagnosis and therapy". Acta Cardiol. 68 (6): 629–33. doi:10.2143/AC.68.6.8000011. PMID 24579442.
  12. Goldenberg DL, Cohen AS (1978). "Synovial membrane histopathology in the differential diagnosis of rheumatoid arthritis, gout, pseudogout, systemic lupus erythematosus, infectious arthritis and degenerative joint disease". Medicine (Baltimore). 57 (3): 239–52. PMID 642792.