[Involvement of the small intestine in systemic scleroderma]

INTRODUCTION

Though impairment of the gastrointestinal tract is commonly encountered in patients with systemic sclerosis, the most frequent abnormalities are esophageal and anorectal disorders. Involvement of the small intestine is also common, reaching a 40-80% prevalence. It often leads to life-threatening complications.

CURRENT KNOWLEDGE AND KEY POINTS

The occurrence of small intestine impairment and its potential relationships with other organ impairment is still unknown. However, it rarely indicates the existence of the disease (10%) which remains asymptomatic for a long period. As clinical symptoms are non-specific and radiological tests (upper intestinal tract barium meal, gastrointestinal transit times of radiolabeled meal, computerized tomography scan) not sensitive enough to detect the symptoms, diagnosis of small intestine impairment is delayed, i.e., when severe complications such as malabsorption or pseudo-obstruction are present. The physiopathology of small intestine disorders is still unclear, leading to both collagenous fibrosis and atrophy of muscle fibers. As well, its treatment is difficult.

FUTURE PROSPECTS AND PROJECTS

Knowledge of the mechanisms at the origin of small intestine impairment in the course of systemic sclerosis is important for the development of efficacious therapies. Manometry of the small intestine would be a useful tool to assess the various motor abnormalities that may occur in patients presenting with systemic sclerosis associated with either malabsorption or pseudo-obstruction. It would also provide a useful test in selecting patients whose treatment require somatostatin analogs.

[Infection and vascular purpura]

Palpable purpura is the hallmark of cutaneous vasculitis. Small-vessel vasculitis is a common vasculitis manifestation associated with acute or chronic infection. It is also characteristic of a systemic disease whether infectious or not. The pathogenic mechanisms appear to be complex: immune complex formation, vessel damage or altered vessel function mediated directly by infectious agents, humoral or cellular immunologic response. It is also a reaction to mixed cryoglobulinemia. Diagnosis of cutaneous vasculitis is simple (palpable purpuric eruption, nodules, vesiculobullous lesions, ulcerations), but etiological investigation is often difficult because the infectious origin is only rarely demonstrated. This type of purpura occurs in bacterial endocarditis and therefore blood cultures must be performed in any febrile patient particularly in the presence of a cardiac murmur. In fact the viral, parasitic or bacterial infectious origin is demonstrated in less than 30% of the cases of leucocytoclastic vasculitis. While focal sepsis is often found and its eradication should be followed-up, its role has not been proven particularly as antibiotics alone themselves can cause hypersensitivity vasculitis. Finally, mention must be made of virus induced vasculitis (B and C hepatitis, cytomegalovirus, parvovirus), antiviral treatment which permits better control of vasculitis.

Influence of age on characteristics of polymyositis and dermatomyositis in adults

In a retrospective study of 79 consecutive patients, we evaluated characteristics of polymyositis (PM) and dermatomyositis (DM) and compared clinical presentation, biochemical findings, histologic changes, evolution, complications, and mortality rate of elderly patients (aged > or = 65 yr) and younger patients (aged < or = 64 yr) at the onset of PM/DM. We found a high prevalence of PM/DM in elderly patients: 23 patients (29%) were aged 65 years or over. We also found that esophageal involvement (34.8% versus 16.1%, respectively) and bacterial pneumonia related to both ventilatory insufficiency and esophageal impairment (21.7% versus 5.4%, respectively) were more common in elderly patients compared with younger patients, resulting in increased morbidity and mortality rates. Moreover, malignancy frequency was higher in elderly patients compared with younger patients (47.8% versus 9.1%, respectively, p = 0.0001), particularly patients with DM (10/11). Fifty percent of malignancies were colon malignancies in elderly patients. Erythrocyte sedimentation rate, C-reactive protein, fibrinogen, and ferritin levels were also higher in the elderly patient group compared with the younger group, and the presence of serum hypoprotidemia, hypoalbuminemia, and anemia was more frequent. Finally, PM/DM complete remission was less frequent (13.6% versus 41.1%) and the mortality rate (47.8% versus 7.3%) was higher in elderly patients than in younger patients. The main causes of death in elderly patients were bacterial pneumonia, due to ventilatory insufficiency and esophageal impairment, and malignancies. Our findings therefore indicate that PM/DM-related esophageal and lung involvement should be systematically searched for in elderly patients. Esophageal manometry and pulmonary function tests should become an integral part of initial evaluation in elderly patients for early detection of impairment. Moreover, as we observed a marked overrepresentation of colon cancer in elderly patients with DM, we suggest that the search for malignancies in elderly patients with DM should include lower gastrointestinal tract investigations.

[Osteo-neuro-meningeal-lumbosacral involvement in Marfan syndrome. Report of a case]

Marfan syndrome is an hereditary condition which primarily affects conjunctive tissue with predominant vascular lesions, aortic insufficiency and aortic dissection which condition vital prognosis. Until further progress is made in the genetic determination of the disease, the diagnosis is currently based on the association of clinical criteria, which enables multidisciplinary management. This approach should lead to specific medical and surgical treatment--which may reduce Marfan morbidity and mortality. We report the case of a 45 year-old patient with suspected Marfan syndrome during adolescence. The presence of a cardiovascular lesion and a recently reported abnormality i.e. a sacral erosion by a dural ectasia, enabled us to confirm the diagnosis. We reviewed the current criteria in Marfan diagnosis and their specific management.

[Are antiphospholipid antibodies thrombogenic in the course of human immunodeficiency virus infection?]

Lupus-like anticoagulant is commonly encountered in human immunodeficiency virus infection although thromboembolic manifestations are rare in HIV patients. We report the case of an HIV patient who developed gangrene of both forefeet associated with anticardiolipin antibodies. A 42-year-old woman had a 12-year history of HIV infection (stage B2). She presented with painful gangrene involving the forefeet of 4-day duration. Doppler ultrasonography, electromyography and nailfold capillaroscopy were normal. Skin biopsy revealed intracapillary thrombi and severe necrosis within the hypodermis; there was no evidence of vasculitis. Laboratory findings showed a marked inflammatory syndrome and the presence of anticardiolipin antibodies (IgG: 22 GPL U/ml). Several cutaneous manifestations are known to be associated with antiphospholipid syndrome, such as livedo reticularis, ulcers and gangrene of the extremities. Skin biopsy often shows noninflammatory thrombosis of small vessels within the dermis. Microcirculation damages have also been described in HIV infection, mainly vasculitis. In the present case report, the absence of both vasculitis and other causes suggest that anticardiolipin could be the culprit. But, it is possible that painful gangrene of the forefeet was secondary to HIV infection.

Manometry of the upper intestinal tract in patients with systemic sclerosis: a prospective study

OBJECTIVE

To assess both the prevalence and the characteristics of motor disorders of the small bowel in patients with systemic sclerosis (SSc) and to investigate for an association between clinical manifestations in the upper intestinal tract, capillaroscopic features, esophageal motor impairment, and manometric evidence of motor disturbances.

METHODS

Fasting and postprandial motor activity of the upper intestinal tract was studied in 17 consecutive patients with SSc (6 with and 11 without clinical manifestations of small bowel involvement) and 17 age- and sex-matched healthy control subjects.

RESULTS

The prevalence of manometric evidence of intestinal involvement was as high as 88% in the SSc patients; normal motor activity was present in only 2 patients. The median values for duodenal and jejunal interdigestive phase III migrating motor complex duration, amplitude, and velocity and the postprandial motility index were therefore lower in SSc patients compared with controls. Our manometric findings indicated that there are both neuropathic and myopathic stages of upper intestinal tract dysfunction in SSc. Furthermore, no association could be found between the severity of the intestinal manometric abnormalities and clinical presentation, SSc subsets, disease score, capillaroscopic findings, or esophageal manometric impairment.

CONCLUSION

We suggest that manometry of the upper intestinal tract may be useful in SSc patients with clinical manifestations in the small bowel (i.e., malabsorption syndrome or pseudoobstruction) in that it can be used to accurately evaluate both the nature and the severity of motor disturbances. Furthermore, this procedure can be used to assist in the selection of patients who may require octreotide therapy.

Nosocomial febrile illness in the elderly: frequency, causes, and risk factors

BACKGROUND

Although nosocomial febrile illness (NFI) is common in hospitalized patients, it has been less extensively studied in the elderly.

OBJECTIVE

To determine the frequency, causes, and risk factors of NFI in elderly inpatients.

METHODS

This prospective study involved 608 patients (> or = 65 years of age) admitted in an acute geriatric unit. Investigators followed this cohort until 1 of the following events occurred: development of NFI, discharge from the geriatric unit, or death. The cause of NFI was classified into 3 groups: infectious, noninfectious, and no apparent diagnosis. We systematically studied 17 comorbid conditions, 6 drugs, and 7 invasive procedures. For comparison, the patients were stratified into 2 groups: patients with NFI and patients without NFI.

RESULTS

Sixty-six patients (10.9%) with NFI were identified. They were compared with the remaining 542 patients without NFI. In 49 patients (74%) with NFI, the cause was infectious; in 9 (13.5%), it was noninfectious; and in 8 (12.5%), there was no apparent cause. After multivariate analysis, only fecal incontinence (odds ratio [OR], 5.54; 95% confidence interval [CI], 2.13-14.5), congestive heart failure (OR, 2.97; 95% CI, 1.53-5.76), and pressure ulcers (OR, 2.93; 95% CI, 1.19-7.17) were independent risk factors for NFI. The number of invasive procedures preceding the febrile episode was a significant predictor of infection (OR, 3.68; 95% CI, 1.14-9.21).

CONCLUSIONS

Nosocomial febrile illness is a common event in elderly hospitalized patients. In 74% of the patients with NFI, an infection is found. Measures to decrease infectious NFI in the elderly require a reduction in the number of invasive procedures.