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C Masson

Publications and source records attributed to C Masson.

At least 37 records · Page 2Linked to original sources

[Sudden bilateral hearing loss disclosing meningeal carcinomatosis].

We report the case of a patient presenting a sudden bilateral hearing loss. Four years before, a bladder carcinoma was resected and a chemotherapy was started. Gadolinium-enhanced magnetic resonance images revealed enhancement of both acoustic nerves. Cerebrospinal fluid analysis showed malignant cells consistent with the initial bladder cancer. Meningeal metastases from bladder carcinoma are extremely rare. Systemic chemotherapy and its low meningeal diffusion may enhance the incidence of this complication. Bilateral hearing loss is a rare initial manifestation of meningeal carcinomatosis.

Antineoplastic Agents↗

[Inflammatory hypertrophic cranial pachymeningitis].

DEFINITION: Inflammatory cranial hypertrophic pachymeningitis (ICHP) is a fibrosing inflammatory process that thickens the dura mater. This condition is increasingly reported owing to the use of CT and MRI. CLINICAL ASPECTS: Chronic headache and cranial neuropathies are the main presentations. Generally the erythrocyte sedimentation rate is elevated and cerebrospinal fluid is inflammatory. DIAGNOSIS: Non-invasive imagery visualizes the thickening of the dura mater that may be focal or diffuse. On MRI diffuse intense enhancement due to intra cranial hypotension must not be confused with ICHP. Focal thickening of the dura may be tumoral. Biopsy of the thickened dura mater is useful for confirming the inflammatory nature of the process and for orienting the etiological diagnosis. "SECONDARY" ICHP: ICHP has many causes, infectious and noninfectious. It may be the presenting manifestation of systemic diseases as sarcoïdosis or Wegener's granulomatosis. "IDIOPATHIC" ICHP: A diagnosis of exclusion, ICHP might be an isolated intracranial localization of multifocal fibrosis, an ill-defined autoimmune disease. TREATMENT: A specific treatment is indicated in some cases of secondary ICHP. In most cases treatment relies on corticosteroids an/or immunosuppressive therapy.

Adrenal Cortex Hormones↗

[Papillary fibroelastoma: a rare but treatable cause of cerebral infarction].

INTRODUCTION: Papillary fibroelastoma is a benign cardiac tumor which can be associated with serious embolic complications. EXEGESIS: We report on a 42-year-old man admitted for an ischemic stroke in the left middle cerebral artery region. Transesophageal echocardiography revealed a mitral valve tumor. Surgical excision and histological examination showed a papillary fibroelastoma. Clinical course was uneventful. CONCLUSION: We consider the high embolic potential of this tumor, which represents a surgically treatable cause of ischemic stroke.

Adult↗

Management of nontuberculous infectious discitis. treatments used in 110 patients admitted to 12 teaching hospitals in France.

The optimal management of pyogenic discitis is not agreed on. No randomized clinical trials of short-course or oral antibiotic regimens have been published to date. To shed light on this issue, we reviewed the management of patients admitted for pyogenic discitis to one of 12 networked rheumatology departments. In this cross-sectional observational study, each department included the first ten patients admitted starting in January 1997 for treatment of pyogenic discitis. One hundred ten patients met the inclusion criteria, 67 men and 43 women, with a mean age of 60.6 +/- 13.7 years (range, 17-86 years). Mean time from symptom onset to diagnosis was 39.6 +/- 39.8 days (range, 24 h-240 days). Blood cultures were positive in 47.3% of patients, and the percutaneous discal and vertebral biopsy in 63.6% of cases; these two investigations identified the causative organism in 79 cases (72.8%). Mean duration of the rheumatology department stay was 31.3 +/- 14.1 days (range, 4-78 days). Antibiotics were given intravenously to 103 (93.6%) patients, for a mean of 25.5 +/- 17.6 days (range, 4-124 days); duration of intravenous antibiotic therapy was longer than 4 weeks in 36.5% of patients. Only seven (6.4%) patients received primary oral antibiotics with no parenteral antibiotics. One hundred patients were given oral antibiotics at the same time as and after intravenous antibiotics, for a mean duration of 87.2 +/- 43.6 day (range, 20-278 days); Bracing was used in 98 (89.1%) patients. Although antibiotic selection was rational and in agreement with current recommendations, wide differences were noted across centers regarding intravenous treatment duration, hospital stay duration, and total treatment duration.

Abscess↗

Identification of KIN (KIN17), a human gene encoding a nuclear DNA-binding protein, as a novel component of the TP53-independent response to ionizing radiation.

Ionizing radiation elicits a genetic response in human cells that allows cell survival. The human KIN (also known as KIN17) gene encodes a 45-kDa nuclear DNA-binding protein that participates in the response to UVC radiation and is immunologically related to the bacterial RecA protein. We report for the first time that ionizing radiation and bleomycin, a radiomimetic drug, which produce single- and double-strand breaks, increased expression of KIN in human cells established from tumors, including MeWo melanoma, MCF7 breast adenocarcinoma, and ATM+ GM3657 lymphoblast cells. KIN expression increased rapidly in a dose-dependent manner after irradiation. Under the same conditions, several genes controlled by TP53 were induced with kinetics similar to that of KIN. Using the CDKN1A gene as a marker of TP53 responsiveness, we analyzed the up-regulation of KIN and showed that is independent of the status of TP53 and ATM. In contrast, the presence of a dominant mutant for activating transcription factor 2 (ATF2) completely abolished the up-regulation of KIN. Our results suggest a role for ATF2 in the TP53-independent increase in KIN expression after gamma irradiation.

Activating Transcription Factor 2↗

[Hemichorea, hemiballism disclosing non-ketotic hyperglycemia].

Non ketotic hyperglycemia is a metabolic disorder which can induce various hyperkinetic disorders. We report the case of a 74-year old woman admitted to hospital because of choreo-ballic movements of her left hemibody. Laboratory tests revealed non-ketotic hyperglycemia. CT scan showed an increased density in the right putamen and head of caudate. Magnetic resonance imaging disclosed a hyperintense signal involving the right putamen on T1-weighted images. On T2-weighted images, there was a slight hyperintensity in the right putamen and head of caudate. Correction of the underlying hyperglycemia led to complete resolution of abnormal movements. Pathophysiology of this clinicoradiologic syndrome is briefly discussed.

Aged↗

[Cerebral amyloid angiopathies].

PATHOLOGY FINDINGS: Cerebral amyloid angiopathies are defined by the presence of amyloid deposits on the walls of cerebral vessels. These amyloid deposits are found in the media of arterioles of the leptomeninges and the cortex. They are sometimes associated with Alzheimer-type lesions. Overt amyloid vasculopathy characterized by lesions of the vascular wall with a media totally replaced by amyloid substance may be observed. CLINICAL EXPRESSION: Lobular hemorrhage, often with recurrent episodes is the most frequent manifestation of cerebral amyloid angiopathy. Cerebral infarcts or leukoencephalopathy may also be observed. An association with cerebral angiitis has been reported in a few cases. SPORADIC OR FAMILIAL DISEASE: Several types can be distinguished depending on the sporadic or familiar nature of the disease pattern as well as the chemical make-up of the protein deposit. In sporadic cerebral amyloid angiopathy the deposit is composed of protein A beta, and in familial cases, of protein A beta, cystatin C, gelsosine or transthyretin. Mutation of the genes coding for amyloid substance constituents have been identified in diverse forms of familial cerebral amyloid angiopathy.

Adult↗

[Transient global amnesia].

UNLABELLED: A DISTINCTIVE SYNDROME: Transient global amnesia is a very distinctive amnesic syndrome. The attack begins abruptly with massive anterograde verbal and non-verbal amnesia. Retrograde amnesia, variable in extent, is also present. A repetitive questioning behavior is usual. The memory impairment gradually resolves after almost always less than 12 hours. WELL-DEFINED CRITERIA: Specific criteria make it possible to distinguish transient global amnesia from psychogenic amnesia, acute confusional state and transient epileptic amnesia. "Pure" transient global amnesia is usually idiopathic and has a good prognosis. It is also distinguishable from symptomatic transient global amnesia. PATHOGENESIS: Functional imaging studies detect hippocampic or thalamic hypoperfusion. This oligemia may be secondary to neuronal dysfunction compatible with spreading depression. The pathogenic mechanisms remain unclear.

Amnesia, Transient Global↗