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Biomedical subjects

H Duplay

Publications and source records attributed to H Duplay.

At least 19 recordsLinked to original sources
PubMed1997

Comparative study of the National Cancer Institute and French Federation of Cancer Centers Sarcoma Group grading systems in a population of 410 adult patients with soft tissue sarcoma.

PURPOSE: Several histologic grading systems have been validated in soft tissue sarcomas (STS), but no system is currently accepted worldwide. The National Cancer Institute (NCI) and French Federation of Cancer Centers Sarcoma Group (FNCLCC) systems were examined comparatively in the same population of patients with STS to determine which system is the best prognosticator with regard to metastasis development and tumor mortality. PATIENTS AND METHODS: Four hundred ten adult patients with nonmetastatic STS were examined. Histologic grade was established according to the NCI and FNCLCC systems in each case. The prognostic value of both systems was examined using univariate and multivariate (Cox's model) analyses, and special attention was devoted to tumors with discordant grades. RESULTS: In univariate analysis, both the NCI and FNCLCC systems were of prognostic value to predict metastasis development and tumor mortality. In multivariate analysis, high-grade tumors, irrespective of the system used, size > or = 10 cm, and deep location were found to be independent prognostic factors for the advent of metastases. Tumor grade had a higher predictive value than size or depth, and higher prognostic weight was assigned to the FNCLCC grading system in Cox models. Grade discrepancies were observed in 34.6% of the cases. An increased number of grade 3 STS, a reduced number of grade 2 STS, and a better correlation with overall and metastasis-free survival within subpopulations with discordant grades were observed in favor of the FNCLCC system. CONCLUSION: The FNCLCC system showed slightly increased ability to predict distant metastasis development and tumor mortality. The use of this system to evaluate STS aggressiveness might be favored.

Adolescent↗
PubMed1996

Prognostic factors in adult patients with locally controlled soft tissue sarcoma. A study of 546 patients from the French Federation of Cancer Centers Sarcoma Group.

PURPOSE: To define the prognostic factors in adult patients with locally controlled soft tissue sarcoma (STS) and to determine which patients should be considered for adjuvant treatment. PATIENTS AND METHODS: Five hundred forty-six patients with a nonmetastatic and locally controlled STS, collected in a cooperative data base by the French Federation of Cancer Centers (FNCLCC) Sarcoma Group from 1980 and 1989, were studied. Histologic slides of all patients were collegially reviewed. Initial treatment consisted of complete tumor resection with amputation in only 4% of the patients. Adjuvant radiotherapy was administered to 57.9% and adjuvant chemotherapy to 31%. Relationships between tumor characteristics were analyzed, and univariate and multivariate analyses were performed using Cox models for the hazards rate of tumor mortality, development of distant metastasis, and strictly local recurrence. RESULTS: Unfavorable characteristics with an independent prognostic value for tumor mortality were: grade 3 (P = 3 x 10(-10)), male sex (P = 1.5 x 10(-5)), no adjuvant chemotherapy (P = 5.4 x 10(-5)), tumor size > or = 5 cm (P = 3.8 x 10(-3)), and deep location (P = 4.6 x 10(-3)). Unfavorable characteristics for the development of distant metastasis were: grade 3 (P = 4 x 10(-12)), no adjuvant chemotherapy (P = 6.4 x 10(-4)), tumor size > or = 10 cm (P = 9.8 x 10(-4)), and deep location (P = 1.3 x 10(-3)). For the development of local recurrence, the unfavorable characteristics were: no adjuvant radiotherapy (P = 3.6 x 10(-6)), poor surgery (local excision) (P = 2 x 10(-4)), grade 3 (P = 7.6 x 10(-4)), and deep location (P = 10(-2)). Grade, depth, and tumor size were used to define groups of patients according to the metastatic risk. Adjuvant chemotherapy was beneficial in terms of overall survival and metastasis-free survival in grade 3 tumor patients only. Despite worse characteristics concerning tumor depth, tumor-node-metastasis (TNM) and American Joint Committee (AJC)/International Union Against Cancer (UICC) classifications and grade in patients with adjuvant radiotherapy, the latter experienced significantly fewer local recurrences than patients with no radiotherapy. CONCLUSION: Grade, tumor depth, and tumor size could be used to select patients with a high metastatic risk, for which adjuvant chemotherapy could be beneficial.

Adolescent↗
PubMed1996

[Rhabdomyoma of the adult type. Apropos of a case of parapharyngeal site].

The authors report the case of an adult parapharyngeal rhabdomyoma in a-66-years old man, revealed by dysphagia. Optical and electronical microscopic aspects and immunohistochemistry are presented and compared with those of the literature. The pathogenesis of this benign striated muscle tumor is still unclear. A recent study tends to confirm that it is a really benign neoplasm.

Aged↗
PubMed1996

[CAL 54, a new cell line derived from a human renal carcinoma: characterization and radiosensitivity].

A new cell line (CAL 54) was isolated from a malignant pleural effusion of a patient with renal carcinoma. CAL 54 is a continuous and stable cell line. Immunochemical staining showed simultaneous expression of cytokeratin, epithelial membrane antigen and vimentin. Cytometric flow analysis of DNA content reveals one major hyperdiploid population. Histological aspect of the tumor induced in the nude mouse showed well differentiated adenocarcinoma with papillary structure. Radiation response of these cells was evaluated by the colony-forming method and the data were fitted with the linear-quadratic model. Survival at 2 Gy (SF2) was 0.28 and the mean inactivation dose (D) = 1.50 Gy, ranking this cell line among the radiation sensitive cells. CAL 54 may be an informative cell line to investigate radiation effects in the management of renal tumours.

Aged↗
PubMed1992

[Lupus chorea revealing. Study in magnetic resonance imaging. Success of plasma exchanges after resistance to pulsed cortisone].

Chorea as a manifestation of SLE is infrequent (1% of all cases of SLE). A new case is reported herein. The patient, a seventeen-year-old female, was admitted with a one-week history of choreic movements of the left half of the body and arthritis of both wrists. Biologic findings confirmed the diagnosis of SLE with presence of an antiprothrombinase circulating anticoagulant. Findings upon cerebral CT scan and magnetic resonance imaging were normal. Clinical symptoms worsened despite corticosteroids in a daily dosage of 1 mg/kg with three pulses of 800 mg methylprednisolone. High-dose neuroleptic therapy was given and three plasma exchanges were performed. A dramatic improvement in clinical symptoms and biological anomalies occurred and persisted during follow-up which now exceeds one year. The lack of MRI anomalies suggests that the pathogenesis of SLE-associated chorea involves functional neurone activation by immune complexes; the dramatic effectiveness of plasma exchanges may obviate the need for using immunosuppressant agents in patients who fail to respond to corticosteroids.

Adolescent↗
PubMed1991

[Characterization of a human cell line from an anaplastic carcinoma of the thyroid gland].

A new cell line derived from a thyroid anaplastic carcinoma, CAL 62, has been established in culture. This line is constituted by highly tumorigenic cells. Their epithelial phenotype is stable in culture. Immunochemical staining for human thyroglobulin is negative. Cytogenetic analysis showed a gain of chromosome 20, the translocation i (14q), and breakpoints of centrometric chromatine. These results are similar to those previously reported by other investigators. CAL 62 radiosensibility has been studied. The survival curve of the in vitro irradiated cells has been adjusted with a linear-quadratic model. This cell line is thus showed to be radioresistant. Cell line CAL 62 constitutes an appropriate model for in vitro studies of thyroid anaplastic carcinoma.

Aged↗
PubMed1991

[Imaging of non-functional retroperitoneal paragangliomas. Apropos of a case].

The non functional extraperitoneal paragangliomas are rare tumors (less than 50 cases reported). We report a case with ultrasound and CT scan imaging. The tumor is usually large with important necrotic areas leading to a cystic aspect. The malignant tumors more frequent than the benign tumors present with a regional extension and delayed metastasis.

Female↗
PubMed1990

[Useful investigations for the prevention of recurring lithiasis (in the absence of anomalies of the urinary tract)].

The prevalence of renal lithiasis and the rate of recurrences in affected patients raises the problem of the minimum number of investigations really needed to arrive at an accurate diagnosis and establish a potentially effective treatment. Stone recuperation is very important as it allows to carry out an accurate analysis of its constituent(s) (frequently heterogenous). Such analysis already brings forth accurate indications as to the etiology. Other biological investigations should be limited after a first episode of kidney stone disease, but recurring lithiasis will necessitate a much more thorough work-up. Recurrences in certain lithiases, such as those caused by urate calculi, are readily prevented by conventional therapy (uricosuric agents, alkalinization of urine). Withdrawal of certain medicines is paramount in iatrogenic lithiasis. Regarding calcium stones associated with hypercalciuria, results from dynamic tests and their pertinence for differentiating between hypercalciuria due to abnormally high digestive absorption and that due to excessive elimination are currently strongly contested. The role of alimentary factors seems extremely important and prescription of adapted diets appears to be quite effective in view of the present lack of crystal formation inhibitors.

Adenoma↗
PubMed1989

Hyperpigmented acral papular mucinosis, systemic lupus erythematosus and universal alopecia.

A 42-year-old man presented with systemic lupus erythematosus, universal alopecia and non-pruritic hyperpigmented papular mucinosis. The latter was most evident on acral areas. In hyperpigmented areas of the face the immunofluorescence showed deposits as in LE and with alcian blue and colloidal iron an abundance of mucin was demonstrated in the dermis. A lesion on the back showed only papular mucinosis. Fifteen cases of LE and papular mucinosis reported in the literature are reviewed. Our patient differs with respect to the marked pigmentation of his lesions, their localization and the association with universal alopecia.

Adult↗
PubMed1989

Influence of hemodialysis on zidovudine (AZT) and its glucuronide (GAZT) pharmacokinetics: two case reports.

Zidovudine (AZT) is a new anti retroviral agent widely used in the treatment of AIDS and related diseases. It has a short elimination half-life (1 h) in patients with normal hepatic and renal functions, and it is extensively metabolized to a glucuronide derivative (GAZT). In patients with end stage renal disease, the AZT elimination half-life is slightly increased (1.9 h) while for GAZT the very important increase of this parameter results in a major risk of accumulation. A 4-h hemodialysis is more efficient in removing GAZT than AZT. In these patients not only AZT but also GAZT plasma levels should be closely monitored.

Acquired Immunodeficiency Syndrome↗
PubMed1988

[Functional recovery in Guillain-Barre syndrome: benefits of plasma exchange].

A monocentric, retrospective, comparative long term study based essentially on functional criteria was performed on 27 patients presenting Guillain-Barré syndrome, 14 treated with plasma exchange (PE), 13 with conventional therapy during the same period. Severity of the disease was similar in both groups. Functional improvement of PE treated patients was significant and mean duration of hospital stay significantly shortened (mean 79 days). These findings confirm those in the literature and suggest that treatment with PE be applied to every case of severe recent Guillain-Barre syndrome.

Adult↗
PubMed1988

In vitro clonogenicity in relation to kinetic and clinicopathological features of breast cancer.

The clonogenicity in soft agar and the labeling index (LI) which represents the percentage of cells in the DNA synthesis phase, were studied in 59 breast cancer patients and these parameters were related to other known clinicopathological features, namely age, histological grading, estrogen and progesterone receptors and the status of axillary lymph nodes. Out of 59 tumors, 49 could be successfully cloned in soft agar and the mean plating efficiency (PE) was 0.1%. Low grade tumors were more frequently encountered in tumors which did not form colonies (P = 0.025). Cloned tumors had a higher mean LI (P = 0.05). A high PE was associated with low estrogen receptors (ER) (P = 0.03). Clonogenicity was not related to patient age, progesterone receptors (PR) or the status of axillary lymph nodes. These results suggest that a successful in vitro cloning and a high PE are associated with unfavorable prognostic factors in breast cancer.

Agar↗