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E Topuz

Publications and source records attributed to E Topuz.

39 records · Page 3Linked to original sources

Prognostic factors and survival in patients with metastatic or recurrent carcinoma of the uterine cervix.

The aim of this study is to identify the impact of various prognostic factors on survival in patients with recurrent carcinoma of the uterine cervix. Fifty-two patients who were treated with platinum-based chemotherapy for recurrent or metastatic disease were retrospectively evaluated. Twenty-seven patients (90%) had received pelvic radiation as primary treatment. Out of 45 evaluable patients, two (4.4%) had complete response (CR), three (6.7%) had a continuous CR after additional surgical treatment and irradiation. Five patients (11.1%) had partial response (PR). The majority of patients had progressive response to treatment (22 patients, 48.9%). After a median follow-up period of 19 months, 31 patients (60%) had died. Progression-free survival after initial diagnosis was observed to have a significant association with response to chemotherapy for recurrent disease (Fisher two-sided P = 0.027). The median survival duration for relapsed disease was 11.8 months. Those with a longer disease-free interval ( 8 months vs. </= 8 months) from initial diagnosis to first recurrence and response to chemotherapy had a tendency for a longer survival duration after relapse by univariate analysis. Multivariate analysis revealed that progressive response to chemotherapy (P = 0.002, HR = 4.6) and recurrence within the previously irradiated field (P = 0.04, HR = 2.7) were significant independent prognostic factors for a shorter time to progression after recurrence. Furthermore, advanced stage at presentation (P = 0.001, HR = 3.0) and a short disease-free interval after primary treatment (<8 months, P = 0.003, HR = 3.4) were determined as independent prognostic factors with a significant negative influence on progression-free survival and overall survival from initial diagnosis, respectively. The use of toxic and expensive combinations for the treatment of recurrent cervical cancer patients should be well balanced against potential hazards. Based on our data, less toxic regimens would be more feasible in patients who present with advanced disease at initial diagnosis, or those that experience recurrence within the previously irradiated field after a progression-free interval of less than 8 months.

Adult↗

Effects of cisplatin on testicular tissue and the Leydig cell-pituitary axis.

The mechanisms responsible for the rapid increases in levels of gonadotropin and steroid hormones upon administration of cisplatin to rats are not clearly understood. In the present study, the morphologic effects of cisplatin on the testis and the relationship of these changes to serum hormone levels were studied in adult rats. Upon administration of a single dose (5 mg/kg) of cisplatin, the levels of testosterone in the peripheral blood decreased and the level of luteinizing hormone (LH) increased. After 3 days, significant damage to the germinal epithelium became detectable by morphologic examination. In Leydig and Sertoli cells, dilatation of the endoplasmic reticulum, structural changes in mitochondria and an increase in the numbers of inclusion bodies were detected. Although blood-testis barriers between Sertoli cells were normal, the relationship between germinal cells and the relationship between germinal cells and Sertoli cells were distorted. It is concluded that damage to Leydig cells and withdrawal of the controlling effects of the germinal epithelium on the LH-Leydig cell axis could explain the changes in serum hormone levels.

Animals↗