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L Andrac

Publications and source records attributed to L Andrac.

98 records · Page 6Linked to original sources
PubMedDate not supplied

Inflammatory breast carcinoma: an immunohistochemical study using monoclonal anti-pHER-2/neu, pS2, cathepsin, ER and PR.

Immunocytochemical assays were performed on frozen sections of inflammatory breast carcinomas (n = 22) using the following monoclonal antibodies (MoAb): anti-pHER2/neu, cathepsin, pS2, ER, PR and MoAb Ki67. The distribution of these proteins, known as prognostic indicators, was evaluated with an image analysis system (SAMBA, Alcatel TITN, France). On standard HE stained paraffin sections, only about 50% of inflammatory breast tumors exhibited intradermal tumor cell emboli. All tumors were strongly pHER/2neu positive. All tumors also, but to a lesser degree, were cathepsin and ki67 positive. Conversely, less than 40% were faintly ER, PR and pS2 immunoreactive. The results correlated with the high degree of malignancy of inflammatory breast carcinomas. Therefore the immuno-detection of these markers in addition to standard histological techniques appears to be a useful tool to evaluate the degree of malignancy of breast carcinomas.

Antibodies, Monoclonal↗
PubMedDate not supplied

[A new case of Urbach-Wiethe disease. Electron-microscopy study].

A new case of Urbach Wiethe disease is reported. The diagnosis of this disorder, despite the existence of typical histological connective tissue deposits, was recognized late. The authors review the morphological characteristics of the disease, emphasizing that atypical clinical presentations may occur which underline the importance of the histological examination.

Adult↗
PubMedDate not supplied

[Self-healing juvenile cutaneous mucinosis. Clinical, histological and ultrastructural study (author's transl)].

Referring to two other cases reported in the literature, the authors suggest the individualisation of a new form of cutaneous mucinosis which is characterized:--clinically, by the young age of the patient, the peculiar topography of the eruption extending to the face, neck, scalp, abdomen and thighs and the association to deep nodules of the face and the periarticular regions;--biologically by the absence of inflammation, dysglobulinemia, endocrinologic changes or bone marrow plasmocytosis;--by the acute on set of the lesions with spontaneous resolution within a few weeks. The diagnosis is based on histologic and histochemical criteria. The mucinous change occurs in the reticular dermis. Ultrastructural features are similar to those found in other dermal mucinoses. The deposit appears to be composed of an electron lucent matrix containing a micro fibrillar network, probably of polysaccharidic nature. In spite of the histochemical similarity to epithelial mucins, the biochemical composition and mode of production of the deposited substance remain to be elucidated.

Adolescent↗
PubMedDate not supplied

Immunodetection of HER-2/neu protein in frozen sections evaluated by image analysis: correlation with overall and disease-free survival in breast carcinomas.

The immunodetection of HER-2/neu oncogene product was performed in 108 breast carcinomas using immunoperoxidase technique. Monoclonal anti HER-2/neu protein was applied on frozen sections. Immunoprecipitates were evaluated by a computerized system of image analysis (SAMBA). The percentage of the immunostained tissue surfaces and mean optical densities were correlated with the 5 year overall and disease-free survival rates. It was shown that in optimal conditions of antigen preservation and standardized method of immunoprecipitates evaluation, 67% of breast carcinomas were more than 20% pHER-2/neu positive. The pHER-2/neu overexpression was not significantly correlated with the overall 5 year survival. However large positive anti pHER-2/neu surfaces were correlated with higher risk of recurrence (p = 0.0013) and of metastases (p = 0.035).

Adult↗
PubMedDate not supplied

Comparison of the prognostic significance of current and modified histological grades in breast carcinomas.

Paraffin sections of 185 breast carcinomas were reexamined in order to compare the current SBR histoprognostic grade (SBR) with to modified methods of grading recently proposed by two groups, Le Doussal et al (MSBR) and Elston et al (SBR-Elston). In each tumor, the SBR, MSBR, SBR-Elston, and each of their components were correlated with recurrence, metastases and survival rates (follow up 7 to 96 months, m = 52, SD = 19) (Kaplan-Meier test). The Nottingham prognostic index (NPI) was computed for each patient, the histological type reevaluated and both were also correlated with the patient follow up. Our results show that the three methods of grading were significantly (p < 0.0001) correlated. The three grades, were significantly correlated with metastases and survival, but not with the recurrence rates. The differentiation, the nuclear pleomorphism and the mitoses count also correlated with the metastases rate and overall survival but the mitoses number appeared to be a stronger prognostic indicator. The MSBR grading made it possible to refine the prognostic of the tumors usually scored as SBR grade 2. The NPI significantly correlated with metastases and survival (p < 0.0001), whereas the histological types were found to have no prognostic significance.

Adult↗
PubMedDate not supplied

Granulomatous mycosis fungoides.

We report a new observation of granulomatous mycosis fungoides. The diagnosis was able to be made only after performing multiple biopsies during the course of the disease. Initial evolution was rapidly favourable with electrontherapy. A granulomatous reaction is, except in Hodgkin's disease, a rare phenomenon in lymphoproliferative disorders, particularly in cutaneous T cell lymphoma. This variant of mycosis fungoides raises the problem of the histological differentiation from other granulomatous dermatoses, mainly sarcoidosis. Its prognostic significance is disputed and its pathogenesis remains unknown.

Biopsy, Needle↗