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Biomedical subjects

Sterling G West

Publications and source records attributed to Sterling G West.

10 recordsLinked to original sources

Unique characteristics of systemic sclerosis sine scleroderma-associated interstitial lung disease.

STUDY OBJECTIVES: To describe the characteristics of systemic sclerosis sine scleroderma (ssSSc)-associated interstitial lung disease (ILD) presenting as idiopathic interstitial pneumonia (IIP). DESIGN: Retrospective review of six patients with ssSSc-associated ILD diagnosed after referral for evaluation of IIP. MEASUREMENT AND RESULTS: All patients were white, their mean age was 56 years (range, 37 to 86), and gender was evenly divided. Sclerodactyly, skin thickening, and digital edema were absent in all patients. All patients had scattered telangiectasia, and four patients had Raynaud phenomenon with abnormal nailfold capillaroscopy findings. All described gastroesophageal reflux, and three patients had esophageal dysmotility by esophagography. All had restrictive pulmonary physiology and a reduced diffusion capacity. High-resolution CT revealed nonspecific interstitial pneumonia (NSIP) or usual interstitial pneumonia (UIP) radiographic patterns. Of the three patients who underwent surgical lung biopsy, two patients had NSIP and one patient had UIP pathologic patterns. Five patients had asymptomatic pericardial effusions and elevated pulmonary artery pressures by echocardiography. All patients had nucleolar-staining anti-nuclear antibodies (ANAs), and one patient was anti-Scl-70 positive. All five anti-Scl-70-negative patients were anti-Th/To positive, and the anti-Scl-70-positive patient was anti-Th/To negative. CONCLUSIONS: In the presentation of an IIP, the presence of a nucleolar-staining ANA, telangiectasia, Raynaud phenomenon with abnormal capillaroscopy findings, gastroesophageal reflux, or pericardial disease suggests underlying systemic sclerosis. These findings should aid clinicians in the evaluation and treatment of patients with otherwise undefined ILD.

Adult↗

Anti-th/to-positivity in a cohort of patients with idiopathic pulmonary fibrosis.

OBJECTIVE: To evaluate the presence and clinical relevance of anti-Th/To-positivity in patients with idiopathic pulmonary fibrosis (IPF). METHODS: Antinuclear antibody (ANA) testing was performed in 285 patients with a clinical diagnosis of IPF and surgical lung biopsy-proven usual interstitial pneumonia. Twenty-five subjects (8.8%) were found to have a positive ANA with a nucleolar-staining pattern and were followed for 10 years. Immunoprecipitation analysis indicated that 13 of the 25 subjects had autoantibodies against Th/To antigen. RESULTS: All subjects presented with worsening dyspnea. Pulmonary physiology and gas exchange did not differ between those with and those without a positive ANA, those with and without a nucleolar-staining ANA, and those with and without anti-Th/To antibody positivity. Retrospective review of the clinical record revealed that none of the 25 subjects with a nucleolar-staining ANA had the characteristic cutaneous features of systemic sclerosis (SSc). Four of the 13 Th/To-positive subjects had 3 of 5 criteria of limited cutaneous SSc (CREST variant), and 9 met proposed criteria for SSc sine scleroderma. None of the 12 Th/To-negative subjects had 3 or more criteria of limited cutaneous SSc (CREST variant), and only one met proposed criteria for SSc sine scleroderma. Of the 25 subjects with nucleolar-staining ANA, cumulative survival was similar between those who were Th/To-positive and those who were Th/To-negative (log-rank test, p = 0.73). Cumulative survival was similar between the 13 Th/To-positive subjects and all other 272 IPF subjects (log-rank test, p = 0.34). CONCLUSION: Our findings indicate that a nucleolar-staining ANA is a common finding in patients with IPF, and that antibodies against Th/To are responsible for the majority of these. Given the high specificity of Th/To-positivity for SSc, our data suggest that these subjects may have SSc sine scleroderma, and that their prognosis is no different from those with IPF.

Adult↗

Clinical academic rheumatology: getting more than you pay for.

OBJECTIVE: Rheumatology is among the least compensated specialties in medicine today. This is a significant problem for clinical rheumatologists in academic medicine who are often expected to earn their salaries through clinical practice alone. Additionally, academic rheumatologists usually cannot generate revenue through office laboratory monitoring, radiographs, or bone densitometry to supplement their income (i.e., downstream income). The purpose of our study was to examine revenue generated from downstream income to a university by a clinical-academic rheumatologist. METHODS: Consecutive outpatients (n = 127) seen predominantly by one academic rheumatologist over one month of clinic were followed for 18 months. The total physician compensation for patient visits was calculated and compared with the revenue generated from laboratory tests, radiologic studies, consultations, and specific rheumatologic treatments and procedures performed or ordered. Medicare reimbursement rates for 2003 were used as compensation standards for all charges. RESULTS: Physician office visit billing generated 36,297 US dollars from 730 office visits. The total amount of downstream income from these office visits was 363,813 US dollars (47,386 US dollars from laboratory tests, 35,582 US dollars from radiologic studies, 8,159 US dollars from rheumatologic procedures, 261,584 from rheumatologic infusions, and 11,101 US dollars from initial consultations). Therefore, 10.02 US dollars of downstream revenue was generated for every 1.00 of office visit compensation applied to the academic rheumatologist's salary. CONCLUSION: Although academic rheumatologists struggle to bill their salaries through seeing more patients, they are clearly a bargain for a university hospital because they generate >10.00 US dollars for every 1.00 US dollars they receive for an office visit.

Academic Medical Centers↗

Radiation exposure in rheumatology practice.

BACKGROUND: Patients encountered in rheumatology practice often have concerns about radiation exposure from the imaging procedures used to diagnose and monitor their diseases. However, such imaging procedures normally deliver radiation doses that are associated with only a low level of risk. OBJECTIVES: To review and quantify the radiation doses delivered by the various imaging procedures commonly ordered in a rheumatology practice and to compare those doses with background radiation exposure in the United States. METHODS: The authors reviewed and compiled literature on radiation exposure from background radiation and diagnostic imaging procedures. The review included a Medline search through December 2003. RESULTS: Radiation doses from medical imaging procedures are so low that they do not have a clinically significant effect on mortality rates. In comparison to our normal daily exposures from naturally occurring background radiation and daily activities, the exposures from medical procedures are quite small. Moreover, the International Commission for Radiological Protection (ICRP) recommends that dose limits should not be applied to medical exposures in nonpregnant patients. Rather, the ICRP recommends that the medical exposure be justified and the protection be optimized so that the dose to the patient is as low as is compatible with the medical purpose. CONCLUSIONS AND RELEVANCE: Appropriate care of patients within the rheumatology practice frequently necessitates the use of imaging procedures that utilize ionizing radiation, such as radiographs, computed tomography scans, and bone densitometry. If ordered prudently, the benefits of these imaging procedures supersede the risks imposed by their radiation exposures.

Arthritis, Rheumatoid↗

Antiphospholipid antibodies as a cause of pulmonary capillaritis and diffuse alveolar hemorrhage: a case series and literature review.

OBJECTIVES: To discuss the clinical manifestations and possible pathogenic mechanisms of the unusual syndrome of diffuse alveolar hemorrhage (DAH) and pulmonary capillaritis without thrombosis in the setting of the primary antiphospholipid antibody syndrome (PAPS). METHODS: Four men with DAH and capillaritis in the setting of PAPS are identified. Their clinical presentations, laboratory, radiographic, and pathologic findings are reviewed as is their clinical course and response to therapy. In addition, the literature regarding DAH and pulmonary capillaritis in the setting of PAPS is reviewed. RESULTS: The patients presented with dyspnea, hemoptysis, fever, hypoxia, and diffuse alveolar infiltrates; none had evidence of acute thromboembolic disease. All secondary causes of DAH were ruled out. All patients had positive testing for the lupus anticoagulant and high-titer anticardiolipin antibodies, including antibodies against the beta-2-glycoprotein I antigen. Three cases had lung biopsies that revealed pulmonary capillaritis and DAH with no evidence of thrombosis. All patients improved with high-dose corticosteroids. Recurrent disease in the setting of aggressive immunosuppression responded to intravenous immunoglobulin. Antiphospholipid antibody-mediated endothelial cell activation in the absence of thrombosis may induce capillaritis as seen in these cases. CONCLUSIONS: The syndrome of DAH and pulmonary capillaritis is further defined. Evidence supports a causative relationship between PAPS, pulmonary capillaritis, and DAH in the absence of thromboembolic disease. Further elucidation of a possible nonthrombotic mechanism of antiphospholipid antibody-mediated pathology is needed to guide future therapies for this unusual manifestation of PAPS.

Adult↗

Cognition, MRS neurometabolites, and MRI volumetrics in non-neuropsychiatric systemic lupus erythematosus: preliminary data.

OBJECTIVE: To correlate cognitive dysfunction with structural and neurometabolic brain findings in patients with non-neuropsychiatric systemic lupus erythematosus (non-NPSLE). BACKGROUND: Over 25% of non-NPSLE patients have cognitive dysfunction, but the cerebral basis of this observation is not well understood. METHOD: Seven patients with non-NPSLE and seven control subjects were given a series of neuropsychological tests and neuroimaging with magnetic resonance imaging and magnetic resonance spectroscopy. Analyses of cognitive function and structural and neurometabolic measures of the brain were performed. RESULTS: Compared with controls, the non-NPSLE patients were significantly impaired on a global cognitive impairment index (CII). No significant differences between the groups were found in choline/creatine (Ch/Cr), N-acetylaspartic acid/Cr, or hippocampal volumes. Ch/Cr was highly associated with CII across the sample. CONCLUSIONS: This is the first study to correlate cognitive impairment with an increase in Ch/Cr ratio among patients with SLE. These results, although preliminary, suggest that changes in cerebral white matter may be important in determining the subtle cognitive impairment that may occur in patients with SLE, even in the absence of neuropsychiatric symptoms.

Adult↗

Central nervous system vasculitis.

Vasculitis of the central nervous system (CNS) is classified as primary angiitis or as vasculitis secondary to a variety of diseases. A wide spectrum of clinical features may occur. A definite diagnosis is hampered by the difficulty in obtaining tissue for histology. Consequently, a diagnosis is frequently made on the basis of clinical presentation, brain magnetic resonance imaging, and cerebral angiography without pathologic confirmation. Recent experience shows that there are multiple other conditions that can mimic CNS vasculitis, many of which have different therapies. Most patients with CNS vasculitis should be treated aggressively with a combination of immunosuppressive medications. The prognosis is greatly improved with early recognition and therapy.

Autoantibodies↗

Sleep apnea in male patients with the fibromyalgia syndrome.

PURPOSE: Fibromyalgia is a common pain syndrome that is often associated with sleep disturbances. The most characteristic pattern noted on formal sleep study is alpha-wave intrusion on delta-wave sleep. This nonrestorative sleep pattern may be endogenous, or caused by any of a number of sleep disturbances. Our goal was to determine the frequency of sleep apnea and its relationship to a nonrestorative sleep pattern in our patients with fibromyalgia syndrome. PATIENTS AND METHODS: All new fibromyalgia patients seen in the Rheumatology Clinic at Fitzsimons Army Medical Center were screened using history and physical examination for suspicion of sleep apnea. When this condition was suspected, the patients underwent formal polysomnography to delineate any sleep disturbance. RESULTS: Four of 92 women, and 13 of 25 men with the new diagnosis of fibromyalgia syndrome underwent polysomnography. Of the women, 2.2% (2 of 92) had significant sleep apnea at formal evaluation; both were obese and had obstructive findings. In contrast, 44% (11 of 25) of the men had significant sleep apnea. CONCLUSIONS: Sleep apnea is not a significant cause of fibromyalgia symptoms in females. In male patients with fibromyalgia, sleep apnea was observed in a large percentage. Fibromyalgia may be a marker for occult sleep apnea in males.

Adult↗