[Reasonable hospital use of mupirocin].
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Biomedical subjects
Publications and source records attributed to V Descamps.
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BACKGROUND: Clinical manifestations of primary parvovirus B19 infection vary greatly. Epidermal megalerythema is the most common feature. We report a particular form resembling a drug-induced hypersensitivity reaction. CASE REPORT: A 19-year-old man had a scarlatiniform eruption associated with multiple node enlargement, elevated liver enzymes and a abnormal white cell count with mononucleosis and lymphopenia, similar to that observed in hypersensitivity reactions. Seroconversion and positive PCR search for viral DNA established the diagnosis of primary parvovirus B19 infection. The spontaneous course was favorable with no recurrence at one month. DISCUSSION: The clinical features and laboratory findings in this case of parvovirus B19 infection closely resembled drug-induced hypersensitivity syndrome. The role of viral agents in the development of hypersensitivity reactions have been suggested. It is important to look for viral infections in clinical presentations mimicking drug-induced hypersensitivity.
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Squamous-cell carcinomas are the most frequent skin cancer after the basal-cell carcinomas. They occur in precursor lesions (dysplasia, actinic keratoses, Bowen's disease). They are mainly present in sun-exposed areas (face, hands). It is important to detect and treat them early. Surgical treatment is easy at an early stage. At a later stage their prognosis is poorer because the squamous cell carcinomas tend to invade locoregional tissue and metastase. Their prevention remains the most important thing by using a photoprotection and treating actinic keratoses.
A RARE DISEASE: Paraneoplastic pemphigus is an rare autoimmune bullous skin disease recently recognized. About 50 cases have been reported since its first description in 1990. CLINICAL MANIFESTATIONS: Clinical signs are polymorphous resembling the cutaneomucosal manifestations of pemphigus vulgar (skin and mucosa erosions, fragile interdermal bullae), pemphigoid (urticaria, distended subepidermal bullae), and polymorphous erythema (plaque lesions). Mucosal erosions predominate however. ASSOCIATED CANCERS: Most cancers associated with paraneoplastic pemphigus are hematologic diseases (non-Hodgkin's lymphomas, chronic lymphoid leukemia). SEVERE PROGNOSIS: No standard treatment has been defined. General corticosteroids and treatment of the causal disease are indicated. The clinical course of paraneoplastic pemphigus does not always follow the course of the associated neoplasm. POSITIVE DIAGNOSIS: Pathology criteria (keratinocyte necrosis, suprabasal keratinocyte vacuolization, intraepidermal acantholysis) and immunohistological findings (antibody and complement deposits at the dermo-epidermal junction and within the keratinocytes on different epithelial substrates) are insufficient for positive diagnosis. Autoantibodies must be identified by immunoprecipitation or immunoblotting to identify the target antigen complex plakin components (desmoplakin I and II, periplakin, envoplakin), the major pemphigoid antigen, desmoglein 3, and certain yet unidentified antigens with a molecular weight of 170 kD. PATHOGENESIS: Paraneoplastic pemphigus appears as a model autoimmune paraneoplastic disease. Its origin remains elusive. It has been hypothesized that tumor-induced inhibition of tolerance to certain antigens implicated in the keratinocyte junctional systems could be involved.
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BACKGROUND: Langerhans cell histiocytosis is an uncommon clonal disorder. Its reactional or genetic nature is debated. CASE REPORT: Three patients aged 71, 75 and 73 years with Langerhans cell histiocytosis also developed myelomoncytic leukemia (AML4, AML5, and chronic myelomonocytic leukemia). In two cases, there was no prior treatment which could potentially induce leukemia. In the third case, AML4 occurred shortly (10 months) after initiation of a vinblastin treatment. DISCUSSION: This pathogenic association suggests a common origin for these two conditions, corresponding to an anomalous pluripotent stem cell line. These cases provide further evidence favoring the hypothesis of a genetic origin rather than a reactional origin for Langerhans cell histiocytosis.
Octreotide has proven to be effective for the treatment of intestinal dysmotility in patients with scleroderma in short-term administration. We report a global improvement of scleroderma manifestations under long-term administration of octreotide. A 53-year-old black woman was diagnosed with a four-year history of progressive and severe systemic scleroderma, with diffuse skin sclerosis, myositic involvement, impaired carbon monoxide transfer factor (57% of the predicted normal value and severe digestive involvement with pseudo-obstruction and bacterial overgrowth into the intestinal lumen). After one month of octreotide (75 mug/d), oral feeding was restarted and weight gain of 6.5 kg was achieved. After 8 months of treatment, normal weight was obtained and skin induration was spectacularly reduced and pigmentation returned to a normal state. Dyspnea disappeared and physical activity was quite normal. Octreotide effects on intestinal transit are unclear and may be secondary to immunomodulation or neurotransmission effects. Extradigestive effects of octreotide in scleroderma have not been studied. This report suggests that long-term administration of octreotide may be beneficial in the treatment of patients with systemic scleroderma. Long-term trials are required to confirm these preliminary results.
BACKGROUND: Prescriptions of tamoxifen can be expected to increase over the next few years, particularly for primary prevention of breast cancer. We report a case of a delayed tamoxifen-induced skin reaction. CASE REPORT: A 50-year-old woman was hospitalized for a diffuse maculopapulous eruption which developed four months after beginning a tamoxifen regimen instituted to prevent recurrence of breast cancer after surgery, chemotherapy and radiotherapy. The eruption resolved rapidly after withdrawal of tamoxifen. The same skin reaction occurred 9 hours after rechallenge with tamoxifen. Patch tests performed later with Nolvadex tablets crushed in vaseline were negative. DISCUSSION: Tamoxifen-induced skin reactions are uncommon. The likelihood that tamoxifen was the cause in this case was very high (C3S3 = I4, B2). The late onset (4 months) in this case is remarkable and misled us to look for another cause which could not be found. Challenge with tamoxifen confirmed its causal role. Once again, negative patch tests were found in this type of skin reaction.
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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.
BACKGROUND: The first sign in the reported case of superior vena cava thrombosis secondary to a pacemaker lead, was exceptional: facial flush. CASE REPORT: A 52-year-old woman had a pacemaker for 10 years for rhythm disorders. She developed facial flush triggered by exercise and anteflexion. The clinical examination revealed collateral thoracic circulation, suggesting thrombosis of the superior vena cava which was confirmed by the angiocavogram. DISCUSSION: Vasomotor flush is an uncommon and misleading initial sign of superior vena cava thrombosis. Induction by exercise and anteflexion is characteristic. Due to the increasing number of implanted patients, clinicians should be aware that pacemaker leads are an uncommon cause of superior vena cava thrombosis.
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