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PubMed1986

[Clinico-pathological studies of CSF dissemination of glioblastoma and medulloblastoma].

Clinico-pathological findings of CSF dissemination which was diagnosed on CT scan, were studied on 13 cases of glioblastoma and 9 cases of medulloblastoma. The type of CSF dissemination and the prognosis of patients were both different between glioblastoma and medulloblastoma. In the former, the dissemination was predominantly in ventricular walls and in the latter, in basal cisterns. The mean survival time after the diagnosis of dissemination is 6 months of glioblastoma as compared with 13 months of medulloblastoma. The Pathological studies show that subependymal and/or subpial infiltration of tumor cells, and thickness of arachnoid membrane by marked mesodermal reaction were demonstrated in cases of glioblastoma. On the contrary, tumor cells of medulloblastoma grow markedly in the subarachnoid space and/or on the ependymal layers. From these pathological findings of CSF dissemination, it will be resulted that the prognosis of glioblastoma is much more poor that of medulloblastoma.

Adolescent↗

PubMed1984

Research on disseminating and implementing health education programs in schools.

Numerous school health education programs have been developed. No matter how effective a given program may be, however, its impact will be determined by the extent to which it actually is disseminated and maintained in classrooms. The dissemination of a program involves purposeful efforts by agencies usually outside the school to implement the program in many different schools, efforts by agencies usually outside the school to implement the program in many different schools, while program implementation involves efforts by those within a given school to effectively use the program in its classrooms. This paper has been prepared to review concepts, strategies, and methods used to study dissemination and implementation; to specify the functions of dissemination and implementation research; and to describe general approaches and specific procedures to evaluate the effectiveness of dissemination and implementation activities. As we develop more and better school health education interventions, the need for research that will allow us to efficiently transport these interventions to classrooms throughout the nation becomes increasingly important.

Adolescent↗

PubMed1980

[Electronystagmograhy in disseminated sclerosis. Uses and limits (author's transl)].

A review of the literature shows the extreme frequency of nystagmus and changes in vestibular reflexes in disseminated sclerosis. During the course of this disease, it is possible to detect nystagmus in at least two-thirds of cases and in a similar proportion there are changes in vestibular reflexes, usually a hyperreflexia, especially in the early phases of disseminated sclerosis. Subjectively the patients rarely complain of vertigo and such symptoms are in any case part of the early form of the disease. On the other hand, disorders of balance are much more frequent but the factors involved are numerous, and the role of the vestibular system is often debatable. Electronystagmography and oculography demonstrate the extreme frequency of spontaneous or fixed gaze nystagmus in this disease, as well as the extreme frequency of changes in conjugated eye movements; changes in reflex, voluntary and automatic conjugated eye movements. As a matter of fact, there are many kinds of nystagmus which are not related to any changes in the vestibular system, but which are rather more part of the overal changes of conjugated eye movements. Seen in this light, electronystagmography and oculography, by exploring the different kinds of conjugated eye movement, can help decisively in the diagnosis of disseminated sclerosis by revealing changes which reflect damage to the brain stem, lesions which are clinically very often silent. In this way the diagnosis of disseminated sclerosis may be confirmed. Furthermore, electronystagmography can easily suggest another diagnosis, other than the early form of disseminated sclerosis of the vestibular type.

Electronystagmography↗

PubMed1995

Two distinct patterns of peritoneal involvement shown by in vitro and in vivo ovarian cancer dissemination models.

We established an in vitro peritoneal dissemination model using six ovarian cancer cell lines and cultured mesothelial cells. Ovarian cancer cells were classified into two types, invasive or adhesive, on the basis of their interaction with the mesothelial cell monolayer. The ovarian cancer cell lines derived from mucinous cystadenocarcinoma, poorly differentiated adenocarcinoma and undifferentiated carcinoma, which belonged to the invasive type, began to invade beneath the mesothelial monolayer from several hours after seeding in vitro, expelling the mesothelial cells at the periphery and forming colonies directly on the dish surface. On the other hand, cancer cell lines of clear cell carcinoma, which belonged to the adhesive type, showed colony formation with adhesion on the mesothelial monolayer even 18 h after seeding. Invasive-type cell lines invaded into the mesothelial monolayer at various rates in vitro, and the degree of invasiveness showed good correlation with the degree of peritoneal dissemination in vivo after intraperitoneal injection of cancer cells into nude mice. Adhesive-type cells showed rather higher dissemination rates in vivo. Microscopic observation of in vivo peritoneal dissemination at one day after inoculation also revealed two patterns of peritoneal involvement similar to those in vitro. In the in vitro model, anti-integrin alpha 2- and beta 1-antibodies inhibited the infiltration of invasive-type cells into the mesothelial monolayer, but did not affect colony formation by adhesive-type cells on the monolayer, indicating that invasion by both cell types was mediated by different molecules. This in vitro model is thought to be useful for analysis of the molecular mechanisms of peritoneal dissemination.

Animals↗

PubMed1995

Localized cicatricial pemphigoid of the Brunsting-Perry type with transition into disseminated cicatricial pemphigoid. Report of a case proved by preembedding immunogold electron microscopy.

BACKGROUND: In 1979, Provost described two patients with the clinical features of disseminated cicatricial pemphigoid for the first time. Until now, only four additional cases of disseminated cicatricial pemphigoid have been described. Existence of diagnosis of disseminated cicatricial pemphigoid has been discussed controversially because in four cases investigated by electron microscopy the blister formation was found below the lamina densa, which is indicative of an epidermolysis bullosa acquisita. OBSERVATION: A 78-year-old woman is presented with a generalized eruption of blisters leaving behind scars that developed after a 7-year-long history of mild circumscribed recurrent blisters and scarring eruptions that had been diagnosed previously as Brunsting-Perry type of cicatricial pemphigoid. Immunofluorescence antigen mapping disclosed the blister formation above the lamina densa. Electron and immunoelectron microscopy using a preembedding immunogold technique revealed blister formation and antibody binding within the lamina lucida, predominantly below the subbasal dense plate. CONCLUSIONS: The clinical features of disseminated blistering followed by scarring, the immunofluorescence antigen mapping, and the electron and immunoelectron microscopic findings in our case for the first time clearly prove the existence of a disseminated cicatricial pemphigoid.

Aged↗

PubMed1995

Involvement of anterior chamber angle structures in disseminated histoplasmosis: report of three cases.

This study describes the involvement of anterior chamber (AC) angle structures in patients with disseminated histoplasmosis. The postmortem eyes from three patients (aged 33, 41, and 42 years, respectively) with disseminated histoplasmosis, two of whom had acquired immunodeficiency syndrome, were examined by light microscopy using hematoxylin-eosin, periodic acid-Schiff (PAS), and Gomori's methenamide silver (GMS) stains. Electron microscopy studies of the choroid were performed in one eye. Significant numbers of budding yeast forms of Histoplasma capsulatum measuring 2-5 microns in diameter were observed within the trabecular meshwork, Schlemm's canal and in the deep intrascleral plexuses. All eyes showed massive involvement of the choroidal vasculature, including the choriocapillaris. The organisms were observed freely as well as in small clusters within the cytoplasm of circulating monocytes. The vessels of the limbal conjunctiva (two eyes) and ciliary body (three eyes) contained many Histoplasma organisms. In one eye, several budding yeast were noted in an iris vessel and in occasional histiocytes within the ciliary muscle. Blood smears containing Histoplasma organisms were observed in two cases. None of the patients had an ophthalmologic examination prior to death. Involvement of the intravascular structures of the eye as well as the AC angle was observed in three patients with disseminated histoplasmosis. The fungus most likely reached the AC angle structures by direct hematogenous dissemination or via the aqueous humor by migration from vessels in the ciliary body and iris. An abnormal retrograde blood flow into the AC angle structures may have also played an important role. We suggested that the intraocular pressure be monitored in cases of suspected disseminated histoplasmosis to detect functional alterations indicative of a blockage in the outflow channels.

Acquired Immunodeficiency Syndrome↗

PubMed1993

Disseminated Mycobacterium genavense infection: clinical and microbiological features and response to therapy.

OBJECTIVE: Mycobacterium genavense is a newly described pathogen that causes disseminated infection in AIDS. It is difficult to detect and identify due to its slow growth and fastidious nature. There is little information available about therapy for this new pathogen. We describe clinical and laboratory features and response to therapy in four patients with advanced AIDS complicated by disseminated M. genavense infection from Denver, Colorado, USA. DESIGN AND METHODS: Retrospective analysis of four cases identified in an AIDS clinic affiliated with a municipal hospital in Denver, Colorado. Clinical samples were inoculated onto BACTEC 12B, Lowenstein-Jensen, and Middlebrook 7H11 media. RESULTS: The clinical features mimicked those of disseminated M. avium complex infection, with invasion of liver, spleen and lymph nodes with acid-fast bacilli (AFB). Acid-fast smears of blood and lymph nodes were positive; there was a modest increase in the growth index in BACTEC broth and tiny colonies appeared on Middlebrook agar. Patients were treated with combinations of antimycobacterial agents. Blood smears and cultures reverted to negative in treated patients. The best clinical response was associated with clarithromycin therapy. CONCLUSIONS: Disseminated disease due to M. genavense should be suspected among patients with the clinical presentation of disseminated M. avium complex infection and low growth index on BACTEC cultures for AFB. The diagnosis of M. genavense may be facilitated by performing acid-fast stains of samples from BACTEC bottles in such individuals. Clarithromycin therapy is associated with clinical improvement and clearance of bacteremia.

AIDS-Related Opportunistic Infections↗

PubMed1996

Idiopathic disseminated bacillus Calmette-Guérin infection: a French national retrospective study.

OBJECTIVE: Disseminated bacillus Calmette-Guérin (BCG) infection after inoculation of live vaccine is considered to result from impaired immunity of the child. However, in half of the cases, regarded as idiopathic, no well-defined immunodeficiency condition can account for the infection. The objective of the present study is to report the prevalence, clinical features, associated infections, and outcomes of children with idiopathic disseminated BCG infection. DESIGN: National retrospective survey during the period from 1974 through 1994 in France. SETTING: All neonatology and pediatrics units in primary care and referral centers throughout France. PATIENTS: Data were collected from 595 (82%) of 721 units, 377 (93%) of 407 centers, and 320 (93%) of 345 cities. Selection criteria included BCG infection, dissemination to at least two areas beyond the inoculation site, and no well-defined immunodeficiency condition. Sixteen children (8 girls and 8 boys), born to families unrelated to each other but often consanguinous (5 of 16) or abroad (5 of 16). RESULTS: The minimal prevalence rate was estimated at 0.59 cases per 1 million vaccinated children born in France. Clinical features included fever and cachexia, disseminated BCG infection to lymph nodes (15 of 16), skin (13 of 16), soft tissues (11 of 16), lungs (11 of 16), spleen (11 of 16), liver (11 of 16), and bones (9 of 16). Eight children had associated or subsequent severe opportunistic infection (50%), with either nontyphi Salmonella enterica serotypes (7 of 16) or Mycobacterium abscessus (1 of 16). The outcome was poor: 8 children (50%) died; the cause of death was BCG infection for most children (7 of 8); 8 survived until the last follow-up (50%). CONCLUSIONS: Idiopathic disseminated BCG infection is a rare but severe complication of BCG vaccination. The infection probably results from an as yet unknown genetically determined immunodeficiency condition that affects the killing of intracellular bacteria such as BCG and Salmonella.

BCG Vaccine↗

PubMed1977

[Familial cases of disseminated sclerosis].

The report contains a description of 3 families with disseminated sclerosis (2 siblings in each family). The detected changes in the immunological reactivity of these patients are correlated with the data of the previously studied 112 patients with disseminated sclerosis and speaks in favour of a neuroallergical reaction, the important role of which in the pathogenesis of disseminated sclerosis is at present generally acknowledged. Having in view the heredity of developing allergic reactions the authors suggest that there is a certain relation between the state of the immunocompetent systems and the predispositional factors in disseminated sclerosis. This serves as a basis for the assumption that disseminated sclerosis can be attributed to diseases with a hereditary predisposition where for the manifestation of the disease there should be an effect of exogenous (viral?) factors.

Adult↗

PubMedDate not supplied

Positioning dissemination in public health policy.

Research should play an important role in the implementation of health policy. The application of research methodologies to dissemination of knowledge and practice is being recognized more and more as a legitimate and important component of the health policy agenda. The issues and priorities concerning health are changing rapidly in many parts of the world. In Canada, the health reform process is suggesting that health policy shift from a concentration on the current mainly curative system to one which is more balanced, with an emphasis on health promotion and disease prevention, targeted not only to the individual but to whole populations. The reform process creates significant opportunities for research and emphasizes the need for dissemination of research findings. We have much to learn about how to disseminate to the appropriate people our current knowledge and the knowledge which will come from new research. A key challenges for dissemination is to narrow the gap between what is known and what is put into practice. Clearly we need to develop a much greater understanding of the dynamic of dissemination and the barriers to it.

Canada↗

PubMed1997

[Extrapulmonary and disseminated pneumocystosis in AIDS. A review of the literature].

We present a literature review about extrapulmonary and disseminated pneumocystosis in AIDS. The prevalence of such infections seems low but is probably under-estimated. Disseminated pneumocystosis occurs in patients with profound immunosuppression, who do not receive prophylaxis against Pneumocystis carinii pneumonia or are treated with aerolized pentamidine. The lack of specificity of symptoms may delay the diagnosis. Most organs may be involved. Three different presentations may be individualized: disseminated pneumocystosis, intra-thoracic only disseminated pneumocystosis, in an intra-thoracic localization alone, and localized extrapulmonary pneumocystosis. The mortality from disseminated disease is high, especially in the presence of low serum albumin level.

AIDS-Related Opportunistic Infections↗

PubMed1997

Disseminated toxoplasmosis. Unusual presentations in the immunocompromised host.

OBJECTIVE: Owing to the increasing number of patients with acquired immunodeficiency syndrome and immunosuppressed transplant patients, disseminated Toxoplasma gondii has emerged as a potentially fatal pathogen. Common presentations include encephalitis, pneumonia, and myocarditis. The objective of this report is to describe the clinical course, histologic features, and outcome in two immunocompromised patients with disseminated toxoplasmosis presenting with parasitemia and panniculitis. MATERIALS AND METHODS: Two cases of disseminated toxoplasmosis presenting with parasitemia (patient 1) and panniculitis (patient 2) were retrieved from the clinical, surgical, and autopsy pathology archives of Vanderbilt University Medical Center, Nashville, Tenn. The histology and diagnostic approaches used are reported. Charts were reviewed for primary diagnosis, therapy protocols, clinical presentation of infection, and outcome. RESULTS: Patient 1 developed a clinically unexplained sepsis syndrome shortly after heart transplantation; T gondii parasitemia was diagnosed by examination of peripheral blood smears. The diagnosis was confirmed at autopsy. Patient 2 was a child undergoing induction chemotherapy for lymphoma who developed rapidly progressive neurologic deterioration accompanied by a maculopapular skin rash; T gondii panniculitis was diagnosed retrospectively when histologic examination was combined with immunohistochemistry. Autopsies performed in both cases confirmed widely disseminated infection. CONCLUSIONS: Disseminated toxoplasmosis should be considered in the differential diagnosis of immunocompromised patients with culture-negative sepsis syndrome, particularly if combined with neurologic, respiratory, or unexplained skin lesions. Examination of Wright's-stained peripheral blood smears or antitoxoplasma immunoperoxidase studies of skin biopsies may be diagnostic and allow rapid initiation of antibiotic therapy. Autopsy findings contributed to both of our cases by documenting the wide-spread heavy parasite burden and demonstrating numerous diagnostic T gondii cyst forms.

Animals↗

PubMed1997

AIDS-related disseminated histoplasmosis in San Francisco, California.

The published reports of patients with the acquired immunodeficiency syndrome (AIDS) with disseminated histoplasmosis come mostly from institutions located in endemic areas for histoplasmosis, where disease is thought to occur by either primary infection or reactivation. The characteristics of reactivation disease are not well delineated. We describe the clinical features of reactivation disseminated histoplasmosis in 46 residents of San Francisco, California, with AIDS who did not report recent travel to an area endemic for histoplasmosis. Patients presented with illness lasting days to months, manifested most frequently by fever, chills, sweats, cough or dyspnea, gastrointestinal complaints, malaise, and weight loss. Physical examination and imaging studies were notable for hepatosplenomegaly, lymphadenopathy, or abnormal pulmonary findings in more than half of patients. Laboratory studies revealed a high rate of cytopenia, elevated serum lactate dehydrogenase levels, abnormal liver function test values, respiratory alkalosis with hypoxemia, and a median CD4 lymphocyte count of 36 x 10(9) per liter. The clinical presentation of reactivation disseminated histoplasmosis in patients with AIDS living in San Francisco is similar to that of disseminated histoplasmosis reported in patients with AIDS living in endemic areas. Reactivation disseminated histoplasmosis should be considered in any AIDS patient with a low CD4 lymphocyte count, a febrile illness, and a history of travel or residence in an endemic area.

AIDS-Related Opportunistic Infections↗

PubMed1998

[Disseminated tuberculosis with cutaneous manifestations in AIDS patients. Presentation of 4 cases].

BACKGROUND: Acute cutaneous miliary tuberculosis is a rare form of Mycobacterium tuberculosis infection which has been described in only 25 published cases in the last 15 years. The appearance of serious disseminated forms of tuberculosis is enhanced by the severe immunodeficiency which characterizes AIDS. METHODS: Four cases are described of disseminated tuberculosis with cutaneous localization clinically described as the acute miliary form. Patients had AIDS and CD4 lymphocyte levels of < 100 cells/mm3. Diagnosis was established in all cases by scraping of cutaneous lesions and direct examination with Ziehl-Neelsen coloration. RESULTS: The 4 patients presented signs and symptoms of disseminated tuberculosis with cutaneous manifestations, without a definite pattern and with localization predominantly on the thorax. Three had BAAR-positive sputum. Multiresistant strains of Mycobacterium tuberculosis were confirmed by antibiogram. One patient infected by a strain sensitive to first-line drugs responded favorably to conventional treatment for disseminated tuberculosis. In the remaining three with multiresistant strains, the evolution of the disease was rapid and unfavorable. CONCLUSIONS: Abrupt appearance of cutaneous lesions in a patient with disseminated tuberculosis and advanced HIV-disease should raise the suspicion of its etiology. Scraping and direct examination using Ziehl-Neelsen coloration is practical, economical and non-invasive diagnostic method.

Acquired Immunodeficiency Syndrome↗

PubMed1998

[Cutaneous manifestations during disseminated trichosporonosis in an AIDS patient].

BACKGROUND: Trichosporon beigelii, causal agent of white piedra can cause disseminated infection in immunodepressed subjects. Systemic infections due to this pathogen have been reported mainly in neutropenic patients and rarely in AIDS patients. CASE REPORT: A 36-year-old HIV+ man from Senegal was hospitalized for fever and meningoencephalitis associated with skin lesions. T. beigelii was isolated from skin biopsies and cerebrospinal fluid cultures. The patients was treated with amphotericin B with regression of the skin lesions. The diagnosis of disseminated T. beigelii infection was retained. DISCUSSION: Disseminated T. beigelii infections are known to occur in immunodepressed subjects, especially in case of neutropenia. In our patient, the presence of two proven localizations (meninges and skin) and the favorable outcome with amphotericin B favored disseminated infection. The good response to treatment can probably be explained by the absence of neutropenia. Skin lesions are frequent, usually occurring as disseminated papulae or purpural nodules. Pathology examination and skin biopsy culture can provide rapid diagnosis allowing appropriate treatment.

AIDS-Related Opportunistic Infections↗

PubMed1998

Specific issues related to developing, disseminating, and implementing pediatric practice guidelines for physicians, patients, families, and other stakeholders.

OBJECTIVE: To describe ways in which medical information should be developed and disseminated, focusing on pediatric practice guidelines as an example of one type of information. PRINCIPAL FINDINGS: The methodology of guideline development is well known and has been previously reviewed. Guideline development poses problems for many medical specialties, but particularly for pediatrics, because (1) few diseases are prevalent, (2) only limited randomized controlled trials have been conducted with respect to specific diagnostic and therapeutic options, and (3) clinicians often are dealing with patient surrogates--parents--rather than with the actual patient. Patient and family involvement in guideline development and dissemination has been limited and may affect the likelihood that guidelines will be adopted and subsequently improve child health outcomes. The science of dissemination, including guidelines and other information, is poorly developed. Little is known about the most effective ways to ensure that guidelines reach clinicians and are adopted. Finally, the effect of guidelines on child health outcomes is itself uncertain. RECOMMENDATIONS: (1) Research efforts should focus on guideline dissemination and adoption. (2) The effect of guideline implementation on health outcomes needs to be better understood. (3) Parents should be more involved in guideline dissemination and adoption.

Acute Disease↗

PubMed2005

Acute disseminated encephalomyelitis after liver transplantation.

BACKGROUND: During the past 10 years, acute disseminated encephalomyelitis has been reported a few times after organ transplantation. OBJECTIVE: To report a case of acute disseminated encephalomyelitis as a complication of liver transplantation. DESIGN: Case report. SETTING: The University of North Carolina Hospital and Medical Center, Chapel Hill. Patient A 49-year-old woman admitted because of acute onset of paresthesias, sensory loss, and weakness after liver transplantation. Acute clinical presentation, results of imaging studies, and comprehensive laboratory evaluation were consistent with acute disseminated encephalomyelitis. INTERVENTIONS: High-dose intravenous corticosteroid therapy followed by maintenance oral dosing. MAIN OUTCOME MEASURES: Clinical and magnetic resonance imaging improvement. RESULTS: Corticosteroid therapy halted clinical progression, with partial resolution of lesions on magnetic resonance images of the brain and spinal cord. CONCLUSIONS: This is, to our knowledge, the first report of acute disseminated encephalomyelitis after liver transplantation. Possible pathogenic mechanisms include a cross-reactive immune response to foreign antigens present within the transplanted organ, or an inflammatory response triggered by viral infection in an immunocompromised host.

Acute Disease↗

PubMed1996

High dose of intravenous antithrombin III without heparin in the treatment of disseminated intravascular coagulation and organ failure in four children.

In several animal experiments, high doses of antithrombin III concentrates have shown beneficial effects on mortality and reversal of coagulation abnormalities which had resulted from disseminated intravascular coagulation. Other experiments have suggested that antithrombin III infusion without heparin is effective in the treatment of organ failure. We clinically treated children suffering disseminated intravascular coagulation only with antithrombin concentrate. Four patients suffering disseminated intravascular coagulation with organ failure were selected. We started antithrombin III concentrate infusion as soon as the diagnosis was established. The dosage of antithrombin III was 120-250 units/kg/day for 2 or 3 days. Heparin was not used. All 4 patients recovered completely and quickly without any complications within 14 days. We suggest that the high-dose antithrombin III infusion without heparin is an effective and safe therapy for disseminated intravascular coagulation with organ failure.

Antithrombin III↗