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C Guettier

Publications and source records attributed to C Guettier.

At least 37 records · Page 2Linked to original sources
PubMed1999

Autopsy can be performed laparoscopically.

A case of laparoscopic autopsy for unexplained inpatient death is reported. The procedure is minimally invasive, easy to perform, accurate, and not disfiguring, rendering it easy to accept among mourning families.

Aged↗
PubMed1999

[Post mortem diagnostic laparoscopy].

The authors report a case of laparoscopy post mortem for unexplained inpatient death. It is minimally invasive, easy to perform, accurate, and not disfiguring. As well, it is easy to accept among mourning families. It should be considered when consent for conventional autopsy is lacking.

Aged↗
PubMed1999

Hepatocellular carcinoma without cirrhosis in the West: epidemiological factors and histopathology of the non-tumorous liver. Groupe d'Etude et de Traitement du Carcinome Hépatocellulaire.

BACKGROUND/AIM: In the West, hepatocellular carcinoma rarely occurs in patients without cirrhosis. In these patients, epidemiological factors and the histopathology of the non-neoplastic liver are not well known. The aim of this study was to clarify these points. METHODS: We studied 30 patients (26 men, 28-87 years) with hepatocellular carcinoma and histologically-proven non-cirrhotic livers. Serological markers of HBV and HCV infection, as well as alcohol and tobacco consumption were evaluated. Pathological changes in the non-tumorous liver (fibrosis, inflammation, steatosis, alcoholic hepatitis lesions, iron overload, and large cell dysplasia) were systematically assessed using semi-quantitative scores. RESULTS: Twenty patients had alcohol intake > or =30 g/d and 16 were smokers. Serological HBV or HCV markers were positive in 10 patients. Only four patients had no exposure to alcohol or tobacco and no serological markers of HBV or HCV Histological examination showed that all livers had pathological changes. Seventeen patients (57%) had clearly-identified chronic liver disease: chronic hepatitis (n = 10) or alcoholic liver disease (n = 7). Non-specific and moderate pathological changes were observed in the 13 other patients (43%), with different degrees of fibrosis, activity, steatosis, and iron overload. Large cell dysplasia was present in 12 patients (40%). CONCLUSIONS: In our study, all patients with hepatocellular carcinoma and non-cirrhotic livers had non-tumorous pathological liver changes, especially iron overload and large cell dysplasia. These results suggest that hepatocellular carcinoma originates from an abnormal histological background, even in non-cirrhotic liver.

Adult↗
PubMed1999

IgA glomerulonephritis associated with microscopic polyangiitis or Churg-Strauss syndrome.

When renal insufficiency occurs in classical antineutrophil cytoplasm antibody- (ANCA) associated vasculitides, histological examination usually finds pauci-immune focal segmental glomerulonephritis. We report on 2 cases of histologically proven necrotizing vasculitis associated with IgA nephropathy. Concomitant vasculitis and IgA nephropathy has only rarely been reported but this joint occurrence may not be coincidental as its pathophysiology is not known. Among vasculitides, IgA nephropathy has more frequently been associated with Henoch-Schoenlein purpura: one microscopic polyangiitis unusual because the patient simultaneously presented ANCA and microaneurysms, and the other Churg-Strauss syndrome associated with mild renal insufficiency. This uncommon association might represent a possible overlap syndrome between these ANCA-associated vasculitides and IgA nephropathy or simply a new type of glomerulonephritis that must be taken into account in these vasculitides.

Antibodies, Antineutrophil Cytoplasmic↗
PubMed1998

Virological and biological characteristics of cervical intraepithelial neoplasia grade I with marked koilocytotic atypia.

The aim of this study was to evaluate virologic and biological significance of marked koilocytotic atypia observed in some cases of grade I cervical intraepithelial neoplasia (CIN I). Thirty-one CIN I cervical biopsy specimens with marked koilocytotic atypia, defined by the presence of meganuclei in the superficial epithelial layers, were compared to 37 CIN I biopsy specimens with usual koilocytes for (1) the human papillomavirus (HPV) type and signal pattern as detected by nonisotopic in situ hybridization (ISH); (2) the proliferation index assessed by Ki 67 immunostaining and (3) the p53 labeling pattern. Interobserver agreement for meganuclei was excellent (k = 0.9). Twenty-five out of 68 biopsies (37%) were positive by ISH for the 6 of 11 HPV probe, 30 (44%) for the 16-18 probe, and 7 (10%) for the 31/33 HPV probe, 6 (9%) were negative for ISH. The presence of meganuclei was strongly related to high and intermediate risk HPV type (P = 0.0001). The sensitivity and specificity of meganuclei for the detection of high or intermediate risk HPV in CINI were 73 and 87%, respectively. Loss of p53 immunostaining in the lower third of the epithelium was also related to the presence of meganuclei (P < .05), but the MIB-1 index and ISH labeling pattern were not. In conclusion, marked koilocytotic atypia in CIN I is a reliable and sensitive marker for infection by high or intermediate-risk HPV, and might be a guide to therapy.

Antigens, Nuclear↗
PubMed1998

Arterial response to mild balloon injury in the normal rabbit: evidence for low proliferation rate in the adventitia.

BACKGROUND: The role of constrictive remodeling, spasm and proliferation (particularly in the adventitia) in the genesis of chronic lumen narrowing after balloon injury remains under debate. This study analyzed the time course of these components following mild injury in normal arteries. METHODS: Iliac injury was induced by balloon overstretch in 32 rabbits, sacrificed at timed intervals from day 3 to 28. Angiographic response to nitrates, morphometric, immunohistochemical and biochemical analysis were performed at each time point. RESULTS: Quantitative angiography showed a decrease in lumen diameter and no change in response to nitrates over time. On morphometric analysis, remodeling was usually constrictive, appeared as early as day 3 and was responsible for 69+/-14% of the histologic lumen area stenosis at day 28. Constrictive remodeling was correlated negatively to intimal hyperplasia (r= 0.51, P< 0.002) and positively to the lumen area stenosis (r= 0.92, P< 0.0001). Macrophages (labeled by anti-RAM 11 antibodies) were very rare at all time points. Immunohistochemistry identified a high rate of proliferating smooth muscle cells in the media (13+/-7%) and intima (49+/-8%) at day 7, which decreased rapidly. Proliferating cells in the adventitia were rare (3+/-2% at day 7). The number of proliferating cells was time-dependent (r= 0.82, P< 0.0001) and related to cyclin A mRNA measured by reverse transcription-polymerase chain reaction (r= 0.84, P< 0.0001). CONCLUSIONS: In this model, luminal loss was mainly caused by constrictive remodeling rather than intimal hyperplasia. Constrictive remodeling appeared early and was not time-dependent. Macrophages, spasm and adventitial proliferation did not contribute to this constrictive remodeling.

Angioplasty, Balloon↗
PubMed1998

Perforin and granzyme B lytic protein expression during chronic viral and autoimmune hepatitis.

BACKGROUND: Cytotoxic T lymphocytes and Kupffer cells are essential components of the immune response during liver diseases. Recent studies have highlighted the role of cytotoxic T lymphocytes using Fas and its ligand in induced hepatocyte death during acute and chronic hepatitis. METHODS: In the present work, the main purpose was to investigate perforin and granzyme B expression in liver biopsies of patients with chronic hepatitis (10 HBV, 14 HCV and 10 autoimmune hepatitis) using immunohistochemistry. The liver biopsies of two normal individuals were also studied in the same conditions. RESULTS: Few intrahepatic T lymphocytes expressed perforin and granzyme B, while a large number of Kupffer cells were positive for both proteins in all the patients tested. The co-localization of perforin and granzyme B, and CD3 or CD68 antigens was visualized, respectively, in T cells and Kupffer cells, using confocal microscopy. In situ hybridization assays confirmed that perforin and granzyme B mRNAs were present in the liver during chronic hepatitis. The results were similar among the three groups of patients and whatever the activity of the disease. Perforin and granzyme B expression was lacking in liver samples from normal individuals. CONCLUSIONS: These data suggest a minor role for the T cell-mediated perforin/granzyme B death pathway, and a putative role for Kuppfer cells via lytic protein release, during chronic hepatitis.

Adolescent↗
PubMed1998

[Adult multi-nuclear cell hepatitis. A study in 17 patients].

OBJECTIVES: Giant-cell hepatitis is rare in adults and its significance has not been clarified. We report the clinical and histological characteristics and outcome in a group of adult patients with giant-cell hepatitis. METHODS: Seventeen patients with giant-cell hepatitis, hospitalized in our unit between 1976 and 1992, were studied retrospectively. Giant-cell hepatitis was defined as at least two hepatocytes with four or more nuclei per cell on liver biopsy. Clinical and biochemical parameters, liver histology, and the serological profile of HAV, HBV, HCV, HIV, HSV, EBV, CMV, and paramyxovirus were evaluated. Paramyxovirus immunochemistry was performed in 6 liver biopsies. RESULTS: There were 11 females and 6 males, an average of 48 years old (range: 29-80). Four patients had a well-defined etiology: acute hepatitis B infection with a favorable outcome in 2 cases, clometacine induced-hepatitis resulting in death from liver failure in one case, and chronic hepatitis B and C in one patient with AIDS. Among the 13 patients in which the etiology could not be determined, histologically defined acute hepatitis was observed in 8 and chronic hepatitis in 5. Nine patients were treated with immunosuppressive drugs. One patient was lost to follow-up. Eight patients responded to treatment, but 5 patients progressed to cirrhosis between 5 months and 7 years. Two of the 4 patients with unexplained liver disease who did not receive any treatment died of liver failure. CONCLUSION: In patient with acute or chronic hepatitis without an identified cause (with or without autoimmune abnormalities), the presence of giant-cell hepatitis seems to have a similar evolution as active autoimmune hepatitis. The poor prognosis of these patients suggests that early immunosuppressive treatment is justified.

Adult↗
PubMed1998

[Autoimmune hepatitis induced by fibrates].

AIM: Long term treatment by fibrates could induce chronic hepatitis associated with auto-antibodies. The aim of this study was to assess the features of this hepatitis. METHODS: Baseline clinical and biological features, and liver biopsy in 5 patients with fibrate-induced chronic hepatitis were studied, as well as their outcome. RESULTS: At enrollment, patients (4 men, mean age 65 years) had highly (n = 3) or mildly (n = 2) increased serum aminotransferase activity, hypergammaglobulinemia and high titers of anti-nuclear antibodies (with homogenous fluorescence in 3 cases). Liver biopsies demonstrated a lympho-plasmocytic infiltrate in all cases. Hepatocellular necrosis was multilobular in 2 cases, and mild to moderate, located in lobular and periportal areas in 3 cases. Cirrhosis was found at presentation in 3 cases and developed within a few months in the 2 other patients. After discontinuation of fibrates, aminotransferase activity normalized within 6 weeks either spontaneously (n = 3) or under immunosuppressive treatment (n = 2). Immunosuppression was rapidly withdrawn in 2 patients (< 18 months) without relapse, while one patient was treated for 4 years because of relapse after early withdrawal. A second liver biopsy performed 6 months after discontinuation of fibrates in an untreated-patient showed no inflammation or necrosis. CONCLUSION: These observations suggest that fibrates could trigger chronic liver disease resembling type I auto-immune chronic hepatitis, which resolves after drug withdrawal.

Aged↗
PubMed1998

[Immunohistochemical characterization of the inflammatory infiltrate in the human endometrium prior to in vitro fertilization and embryo transfer].

UNLABELLED: Infiltrating leukocyte population appears at the time of implantation in the endometrium of human and other mammals with hemochorial placentation. This leukocyte population is mainly composed of macrophages and typical granular lymphocytes CD56+ CD16-. 63 endometrial samples were studied using immunocytochemistry, before IVF and embryo transfer. We evaluated the sensibility for the assessment of immunological relevant infiltrating cells, of classical histopathologic examination compared with quantitation of leukocyte-common-antigen antibody immunostaining. 21 samples were thoroughly studied during proliferative phase. RESULTS: The sensibility of classical histologic analysis for the semi-quantitative assessment of leukocyte population, even when performed by an experienced histopathologist, is only 62%. When leukocyte population during proliferative phase is dense, it is mainly composed of macrophages and CD56+ CD16- lymphocytes. CONCLUSION: Immunological reaction already reported around the time of implantation may occur at other period of the menstrual cycle. Close mechanisms of the control and functions of this characteristic reaction remain to clarify.

Adult↗
PubMed1998

[Does laparoscopy reduce the incidence of useless appendectomies?].

The aim of this retrospective study is to evaluate the impact of laparoscopic appendicectomy on the incidence of histologically normal appendices. Between 1987 and 1997, 1220 consecutives patients--with an average age of 23.5 years (17-73) and including 841 women (69%)--underwent appendicectomy due to the presence of at least one of the following 3 criteria: right iliac fossa guarding, fever greater than 38 degrees C and hyperleucocytosis greater than 10,000. Patients were divided into two group.: First group with 930 patients were operated by laparotomy and the other group of 355 patients underwent laparoscopic exploration with appendicectomy when macroscopic abnormalities were observed (290 cases). In all cases, the appendices were examined under blind conditions and classified as normal or pathological, and were subsequently classified according to the nature and the severity of the lesions. In group I (laparotomy), the incidence of histologically normal appendices was 25.1%. In group II (laparoscopic), this incidence was only 8.2%. The difference was significant (p = 0.015). In 65 cases (18.3%), a macroscopically normal appendix was left in place: in 55 cases the symptoms were due to another identified cause, however, in 10 cases no cause was found. This study suggests that laparoscopy significantly reduces the number of histologically normal appendices because an other cause is identified more easily provided macroscopically normal appendices are not removed with a small proportion (5-10%) cases of early appendicitis with only mucosal involvement. In the absence of other causes for the symptoms, a three-day course of antibiotics can be tried in order to treat possible mucosal lesions. This approach reduces costs without having any adverse consequences on outcome.

Adolescent↗
PubMed1997

Botryomycosis.

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AIDS-Related Opportunistic Infections↗
PubMed1997

[Unusual vascular lesions in the course of a colonic leishmaniasis in an HIV positive patient].

Patients with acquired immunodeficiency syndrome are often susceptible to atypical dissemination of visceral leishmaniasis. Digestive localizations seem to be relatively frequent. Colonic localizations reported in the literature are endoscopically normal or show superficial mucosal lesions. We describe an original case of leishmaniasis associated with a colonic pseudotumoral stenosis with perforated ulcer penetrating in the mesocolon. Striking inflammation of mesenteric blood vessels, even far from the ulcer, suggested an ischemic mechanism for the colonic stenosis. These findings raise the hypothesis that vasculitis is secondary to mucosal parasitic infection.

Adult↗