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The 1991 literature on septic arthritis included a concise review of adult septic arthritis, examples of pseudoseptic arthritis, and two interesting animal studies. One animal study examined the induction of acute synovitis by the intra-articular injection of bacterial endotoxin and the cytokines tumor necrosis factor-alpha, and interleukin-1 beta; and the other studied the effects of early and delayed synovectomy in the management of septic arthritis. The predispositions to septic arthritis can be divided into local joint abnormalities, systemic factors, or both. Examples of the local joint abnormalities include osteoarthritis of the hip and apatite-associated arthropathy. Septic arthritis in a patient with rheumatoid arthritis, in a patient with diabetes mellitus and hip arthropathy associated with hemochromatosis, or in a patient with acquired immunodeficiency syndrome and hemophilic arthropathy are examples of how systemic predisposition is coupled with local joint pathology to increase the vulnerability of the host to joint infection. Other examples of systemic disease that predispose to septic arthritis are systemic lupus erythematosus, hypogammaglobulinemia, and human immunodeficiency virus infection, as well as intravenous drug abuse. Unusual microorganisms causing septic arthritis in the adult include Achromobacter xylosoxidans, Moraxella catarrhalis, meningococci, and diphtheroids. Uncommon pathogenesis is represented by a case of intra-articular inoculation of Mycobacterium gastri into the small joint of the hand and a case of mixed bacterial infection of the hip resulting from an extension of a contiguous pelvic infection associated with trauma. Two cases of immune complex glomerulonephritis illustrate the extra-articular complications of septic arthritis: one due to group G streptococcus and the other due to pneumococcus. Finally, septic bursitis is reviewed from the community practice perspective.
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PMID:Bacterial arthritis. 150 74

Periarticular involvement and joint mobility were investigated in 100 non insulin dependent diabetic patients, compared to 100 healthy control subjects of similar age and sex. Periarticular involvement was much more common in diabetics (p < 0.01) including limitation of joint mobility (hands) (40% vs 9%), Dupuytren (29% vs 2%), palmar synovitis (59% vs 7%) and capsulitis (16% vs 1%). Diabetic patients with limitation of joint mobility had more neuropathy (80% vs 56%), retinitis proliferans (35% vs 17%) and alterations of the skin of the hands, compared to diabetics without limitation of joint mobility. Diabetes should be investigated in subjects with periarticular manifestations such as those described in this paper. Also, a more advanced stage of diabetes may be suspected in diabetics with such manifestations.
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PMID:[Adult non-insulin-dependent diabetic: limitation of articular mobility and soft tissue involvement]. 184 93

Diabetes mellitus is associated with several non articular rheumatic conditions and is a cause of Charcot's arthropathy. We report three cases of long-standing insulin-dependent diabetics who developed an inflammatory monoarthritis of the ankle. There was no evidence of a peripheral neuropathy or sepsis. They were all seronegative for rheumatoid factor. In two the synovitis persisted; in the third there was a gradual resolution. This type of inflammatory synovitis has not been previously described in diabetes. It developed after a mean duration of diabetes of 34.3 years (range 18-52 years). We suggest that it may be associated with microvascular changes in diabetes, possibly involving hypoxic reperfusion.
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PMID:Monoarthritis of the ankle in diabetes mellitus without neuropathy: a report of three cases. 239 Aug 52

Collagen-induced arthritis in the diabetes-resistant BB (DR BB)/Wor rat is a severe, aggressive disease initiated by immunization with heterologous native Type II collagen. Onset of clinical symptoms reproducibly occurs in 100% of animals between days 10 and 12 following collagen immunization. Hypertrophy of the synovial lining is the first histological manifestation of the early inflammatory arthritis. A mild inflammatory infiltrate in the synovium rapidly becomes a fibrovascular pannus eroding articular cartilage and subchondral bone. Beginning at the joint margins, an active synovitis is present. Light microscopy and immunohistochemical staining show the infiltrate to be comprised of mononuclear (lymphocytes, macrophages) and polymorphonuclear inflammatory cells. In addition, there is histological evidence for chronic inflammatory nodules and necrotizing vasculitis in connective tissue from diseased joints, both morphologic features associated with rheumatoid arthritis in humans. Subchondral bone erosion appears to be mediated largely by the resorptive action of activated osteoclasts. These histological parameters of disease progression in the DR BB/Wor rat are similar to human rheumatoid arthritis. The extensive degree of similarity in the pathology of DR BB/Wor rat collagen-induced arthritis and human rheumatoid arthritis supports the role of this model as an in vivo disease model for human rheumatoid arthritis.
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PMID:Clinical and histological assessment of collagen-induced arthritis progression in the diabetes-resistant BB/Wor rat. 906 45

Routine blood work that includes ESR, CRP, and glucose levels, and plain radiographs and knee aspirations are obtained from our patients who have clinical suspicion of infection. If the culture result is positive and blood tests suggest infection, the surgical plan is a two-stage revision with an interval period of intravenous antibiotic administration. Risk factors are identified, and the patient's condition optimized. An infectious disease consultant is also involved in the treatment care plan and advises the patient about the best antibiotic, management of proper antibiotic levels, and home care. If culture results are negative, cultures are repeated every week for 3 to 4 weeks after the patient stops taking antibiotics. If the cultures yield positive results, a two-stage revision protocol is initiated. In patients who have 3 to 4 negative culture results, normal blood tests and radiographs, and no history of any immunocompromised state, such as diabetes or rheumatoid arthritis, diagnoses such as polyethylene wear or synovitis can be considered. If patients have any involved risk factor or blood tests, equivocal or suggestive, isotope scintigraphy is requested. We examine tissue in patients with positive scans and equivocal blood test results with clinical suspicion of infection. We prefer an open arthrotomy, which allows us to take multiple specimens for frozen section, assess fixation of the implant, and look for any other signs of infection. If the frozen section reveals more than 10 PMNLs per high-power field, we proceed to stage 1 revision after obtaining intraoperative cultures. If an organism grows in the cultures, stage 2 protocol is initiated. If no cultures are obtained at 7 to 10 days of incubation, we may consider earlier stage 2 revision at 4 to 6 weeks (Fig. 1). In patients in whom the frozen section reveals less than 5 PMNLs per high-power field, component fixation should be assessed, and if they are loose, revision of the knee should be initiated. As with a septic revision, use of antibiotic-impregnated cement can be considered for fixation. If the components are well fixed, a polyethylene tibial tray is exchanged. In either circumstance, intraoperative cultures should be obtained, and if they yield positive results, antibiotics should be continued for 6 to 12 weeks.
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PMID:Revision total knee arthroplasty: planning, controversies, and management--infection. 1137 35

Patients with diabetes mellitus may encounter various musculoskeletal complications. Typical manifestations can be seen in the hand, such as limited joint mobility, flexor tendon synovitis, Dupuytren's contracture and carpal tunnel syndrome. Humeral periarthropathy is also more frequent. The most serious complications can occur in the form of diabetic foot, which may lead to severe deformities and disability. Diabetic amyotrophy and muscle infarction are more rare complications. While osteopenia has a well recognized association with type I diabetes mellitus, this probably is not true for type II. Similarly, the association between diabetes mellitus and osteoarthritis has not been proven.
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PMID:[Rheumatologic manifestations in diabetes]. 1677 Oct 95

Rheumatoid arthritis is a systemic inflammatory autoimmune disease characterized by symmetric, erosive and chronic synovitis, especially of minor joints. It is associated with increased prevalence of cardiovascular disease and with high mortality. This occurs because of an accelerated atherogenic process, explained by traditional cardiovascular risk factors such as smoking, hypercholesterolemia, age, diabetes mellitus and systemic arterial hypertension. High levels of hemosedimentation velocity and C-reactive protein are directly correlated with increased cardiovascular events. Pro-inflammatory cytokines contribute with endothelial dysfunction, insulin resistance, dyslipidemia, prothrombotic effects and oxidative stress that are at the basis of the atherogenic process. Recent information about atherosclerosis in rheumatoid arthritis allows for identification of the risk factors involved in atherosclerosis that can be best controlled. This could result in a reduced manifestation of the process and its cutback, with consequent decrease of mortality and morbidity related to rheumatoid arthritis.
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PMID:[Rheumatoid arthritis and atherosclerosis]. 1795 59

The purpose of this study was to analyse the intermediate-term results of an arthroscopic procedure to debride and resurface the arthritic glenoid, in a middle-aged population, using an acellular human dermal scaffold. Between 2003 and 2005, thirty-two consecutive patients underwent an arthroscopic debridement and biological glenoid resurfacing for glenohumeral arthritis. The diagnoses included primary osteoarthrosis (28 patients), arthritis after arthroscopic reconstruction for anterior instability (1 patient) and inflammatory arthritis (3 patients). All shoulders were assessed clinically using the Constant and Murley score, and results graded according to Neer's criteria. Statistical analysis was performed to determine significant parameters and associations. A significant improvement (P < 0.0001) in each parameter of the subjective evaluation component (severity of pain, limitation in daily living and recreational activities) of the Constant score was observed. The Constant and Murley score increased significantly (P < 0.0001) from a median of 40 points (range 26-63) pre-operatively to 64.5 (range 19-84) at the final assessment. Overall, the procedure was considered as "successful outcome" in 23 patients (72%) and as a "failure" in 9 patients (28%). According to Neer's criteria, the result was categorized as excellent in 9 (28%), satisfactory in 14 (44%) and unsatisfactory in 9 (28%). Within the unsatisfactory group, there were five conversions to prosthetic arthroplasty. A standard magnetic resonance imaging was performed on 22 patients in the successful outcome group; glenoid cartilage was identified in 12 (thick in 5, intermediate in 1, thin in 6) and could not be identified in 10 patients (complete/incomplete loss in 5, technical difficulties in 5). Overall, five complications included transient axillary nerve paresis, foreign-body reaction to biological material, inter-layer dissociation, mild chronic non-specific synovitis and post-traumatic contusion. Dominance of affected extremity and generalized disease (diabetes, rheumatoid arthritis, generalized osteoarthritis) was associated with an unsatisfactory outcome (P < 0.05). Arthroscopic debridement and biological resurfacing of the glenoid is a minimally invasive therapeutic option for pain relief, functional improvement and patient satisfaction, in glenohumeral osteoarthritis, in the intermediate-term.
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PMID:Arthroscopic debridement and biological resurfacing of the glenoid in glenohumeral arthritis. 2048 Mar 57

Tuberculous septic arthritis is difficult to diagnose. A retrospective analysis was done on patients over 15 years of age who attended Srinagarind Hospital, Khon Kaen, Thailand, between January 1, 1997 and December 31, 2006, whose synovial fluid culture was positive for Mycobacterium tuberculosis. The medical records of 77 patients were reviewed; one-third were in their sixth decade. Comorbid disease was found in 33 cases (42.9%), with systemic sclerosis being the most common (9 cases) followed by diabetes mellitus (5 cases) and chronic kidney disease (5 cases). Chronic monoarthritis was the most common presentation (34 cases) followed by acute monoarthritis (20 cases). More than half of the polyarticular involvements were disseminated tuberculosis. The knee was the most commonly affected joint (36.4%). Sixty percent had delayed diagnosis due to an incorrect diagnosis. Abnormal chest radiography and blood eosinophilia were found in 40 and 57.3% of cases, respectively. Synovial fluid and synovial tissue staining for acid-fast bacteria were positive in 30 and 40% of cases, respectively. A caseous granuloma was present in 57.5% of cases and non-specific synovitis in 12%. Sixty-three percent had bone erosions. Tuberculous septic arthritis should be considered in patients who present with acute or chronic monoarthritis, and who have an abnormal chest radiograph or eosinophilia. Polyarticular involvement was commonly related to having disseminated tuberculosis and may indicate systemic involvement of tuberculous infection.
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PMID:Clinical features of tuberculous septic arthritis in Khon Kaen, Thailand: a 10-year retrospective study. 2132 21

TKs are intracellular signaling molecules essential for cell homeostasis. Inhibition of TKs is used in treatment of malignancies and diabetes mellitus. The present study evaluated the role of Flt3 in antigen-induced arthritis. Mice were immunized with mBSA, and arthritis was induced by an i.a. injection of mBSA. Treatment with the Flt3 inhibitor sunitinib was started together with mBSA immunization or together with the induction of arthritis. The mBSA-injected joints were evaluated morphologically for signs of synovitis and bone/cartilage destruction. Markers of bone metabolism and antibody responses were measured by ELISA. Maturation of DCs in the bone marrow and spleen was evaluated by flow cytometry. Sunitinib treatment reduced the intensity of synovitis and the incidence of bone destruction. The reduction in bone destruction was seen when the treatment was started at the time of immunization or at the time of arthritis induction. The antiarthritic effect was achieved by inhibition of DCs, reduction of antibody production, and bone metabolism. Inhibition of Flt3 is a potent antiarthritic mechanism reducing antigen presentation, synovial inflammation, and bone resorption. Down-regulation of TKs may be a useful tool in the treatment of human RA.
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PMID:Inhibition of fms-like tyrosine kinase 3 alleviates experimental arthritis by reducing formation of dendritic cells and antigen presentation. 2177


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