Biomedical subjects

R Lotocki

Publications and source records attributed to R Lotocki.

9 recordsLinked to original sources

PubMed2003

Early ovarian cancer: what is the staging impact of retroperitoneal node sampling?

BACKGROUND: Comprehensive surgical staging of apparent early-stage epithelial ovarian cancer includes peritoneal washings, biopsies, and retroperitoneal lymph node dissection. Unresolved is the relative frequency or importance of the lymph node dissection. OBJECTIVES: (1) To determine the site(s) of microscopic metastatic disease in women undergoing a comprehensive staging for apparent early-stage cancer of the ovary; (2) to identify those women with metastases in the retroperitoneal lymph nodes alone. METHODS: Between 1985 and 2000, we reviewed all records of women at cancer centres in Winnipeg, Ottawa, and Saskatoon who had undergone a "staging laparotomy" for an apparent early-stage IA epithelial cancer of the ovary. Histology, tumour grade, initial and final surgical stage, and the site(s) of metastatic disease were recorded for all cases. RESULTS: Forty-three of the 128 women (34%) had a final surgical stage of II or III. Sixteen women had positive pelvic biopsies, while 19 had microscopic upper abdominal disease. Eight women had positive retroperitoneal nodes, and in only 2 of these women, disease was found in the retroperitoneal nodes alone. In the 8 women with nodal disease, 5 had grade 3 tumours and 6 had serous histology tumours. CONCLUSION: Comprehensive staging is important to identify women with metastatic disease. Solitary nodal metastases are predominantly found in grade 3 and serous tumours.

Adenocarcinoma, Clear Cell↗

PubMed2002

The benefits of comprehensive surgical staging in the management of early-stage epithelial ovarian carcinoma.

OBJECTIVE: The management of understaged patients with apparent clinically early ovarian cancer is difficult. Options include offering chemotherapy based on histopathologic factors or reoperation to obtain the necessary information needed to assign an accurate surgical stage. This study aims to compare these two approaches and to define the role of staging surgery in this common patient population. METHODS: Retrospective chart reviews were carried out at the Universities of Manitoba and Saskatchewan over the period 1975 to 1999. Demographic data and surgical findings were abstracted and entered into a computerized database for analysis. Patients not having surgical staging procedures were offered platinum-based chemotherapy based on high tumor grades, dense adhesions, and presence of surface excrescences or large necrotic areas. Patients with surgically proven stage I disease were treated with no further therapy regardless of histopathologic factors. Descriptive statistics are used to summarize the data. Logistic and Cox regression models are used to identify significant predicting factors for recurrences and progression-free intervals. RESULTS: One hundred and thirty-eight patients presented with tumor macroscopically confined to the ovary at the time of laparotomy. The median age at presentation is 56.5 (18-90). The histology distribution was serous tumor in 28.3%, mucinous in 26.1%, endometrioid in 23.2%, clear cell in 14.5%, anaplastic in 2.2%, and mixed types in 5.8%. The grade distribution was 47.1% grade 1, 27.5% Grade 2, and 25.4% Grade 3. Sixty-eight percent of the patients had a comprehensive surgical staging procedure initially. Thirty-six percent of these patients were found to have extraovarian metastases and were subsequently treated with adjuvant chemotherapy. Forty-three percent of those not having staging laparotomy were offered chemotherapy based on high risk factors only. At a median follow-up of 58 months. 77% of patients remained disease-free and 23% had recurrent disease. Of 60 patients with surgically proven stage I treated expectantly, 6 (10%) recurred, whereas of 25 unstaged patients treated expectantly due to lack of risk factors 7 (28%) recurred (P = 0.036). In patients treated expectantly, a significant survival advantage was noted in the staged group. Logistic regression showed age (OR 1.032, P = 0.043), high grade (OR 4.16, P = 0.003), and lack of a proper staging surgery (OR 2.62, P = 0.032) to be important factors predicting recurrence. In terms of progression-free interval, only age (OR 1.027, P = 0.048) and tumor grade (OR 3.62, P = 0.05) are significant predictors. CONCLUSION: Absence of surgical pathologic high-risk factors is inferior to comprehensive staging laparotomy findings in guiding recommendations for subsequent adjuvant therapy. Patients who have not been properly staged stand a significant risk of recurrent disease despite more frequent use of chemotherapy. All clinically early-stage ovarian cancer patients should be considered for comprehensive staging surgery prior to further treatment recommendations.

Adolescent↗

PubMed1994

Should selective paraaortic lymphadenectomy be part of surgical staging for endometrial cancer?

Surgical staging of adenocarcinoma of the endometrium attempts to identify the true distribution of disease. The survival value of paraaortic lymphadenectomy selectively performed in patients with histologic risk factors is unproven. The objective of this study was to determine if a staging procedure that did not include paraaortic lymphadenectomy predicted recurrence-free survival in disease surgically confined to the uterus. Between 1978 and 1990, 273 patients underwent surgical staging. Two hundred and sixty-nine were clinical stage I and 4 were stage II. The staging procedure included peritoneal cytology, TAH and BSO, and pelvic lymphadenectomy. Postoperative therapy, if any, consisted of whole pelvis and vault radiotherapy in disease confined to the uterus and systemic chemotherapy in patients with extrauterine disease. Surgical staging resulted in 220 (81%) stage I, 20 (7%) stage II, 27 (10%) stage III, and 6 (2%) stage IV. Eighty-eight patients in stages I and II had deep myometrial invasion or a grade 3 tumor. There were 12 recurrences, 8 in stage I and 4 in stage II, in patients with disease confined to the uterus. Four patients (1.7%) recurred outside the pelvis. Had paraaortic lymphadenectomy been performed in patients with risk factors, this would have mandated 88 dissections to potentially benefit 4 patients. We conclude that paraaortic lymphadenectomy would have been of small benefit to these surgically staged patients.

Adenocarcinoma↗

PubMed1991

Tubular Krukenberg tumor in pregnancy with virilization.

A case of tubular Krukenberg tumor in pregnancy with virilization is presented. The pathology is reviewed. This rare tumor must be distinguished from a Sertoli-Leydig tumor. The index case adds to the previously recorded eight cases. All nine cases reviewed presented with progressive virilization between the third and eighth month of gestation, which regressed after surgery. The fetal outcomes of seven cases have been recorded. The fetuses were all female and of these five were virilized. A gastric primary was found in five cases. A primary breast carcinoma was postulated in another. In the remaining cases either no autopsy was performed or no primary tumor was found.

Adult↗

PubMed1990

Factor analysis of false-negative second-look laparotomy.

From January 1976 through December 1987, 155 patients with ovarian epithelial malignancy underwent a second-look laparotomy. Seventy-seven (50%) had a negative second-look. Recurrence after negative second-look occurred in 15 patients (19.5%). Of the factors analyzed, serous histology and residual disease after initial laparotomy were found to be of significance. Grade of tumor, stage, and ascites were not found to be of significance.

Aged↗

PubMed1986

Staging laparotomy in early epithelial ovarian carcinoma.

It is well known that ovarian carcinoma may have subclinically metastasized at the time of the initial surgical operation when all tumor seemed to be confined to the ovary. A retrospective review of 650 ovarian carcinoma patients from 1976 to 1984 revealed 25 staging laparotomies for early epithelial ovarian carcinoma. Sixteen patients had invasive epithelial ovarian carcinoma, and nine had borderline ovarian carcinomas. Five patients had the stage of their disease changed whereas 20 remained unchanged. Among the staging laparotomy patients, 50% of cases of ovarian carcinoma with ruptured capsules were upstaged as were 33% with those with ascites. Twenty-five percent of cases with invasive epithelial ovarian carcinoma and 12% with borderline ovarian carcinoma were upstaged by a staging laparotomy. As a result of staging laparotomy, 72% of patients were spared treatment. No patient with disease truly confined to the ovaries showed recurrence in spite of receiving no treatment. All patients with disease apparently confined to the ovaries should undergo a staging laparotomy. Only disease remote from the ovary need be treated. If a staging laparotomy is not done, treatment is recommended for apparent Stage I disease.

Adolescent↗

PubMed1982

Mixed Mullerian tumors of the uterus: clinical and pathologic correlations.

The 10-year experience at The Johns Hopkins Hospital with 61 cases of mixed Mullerian tumors were reviewed. The patients had a mean age of 63.7 years and the similar constitutional factors of diabetes mellitus, hypertension and nulliparity of endometrial adenocarcinoma. Only one patient had estrogen exposure. Eighteen percent had had prior exposure to pelvic radiation. The life table survival of the 61 patients was 41.1% at 5 years. The 2-year life table survival was 76% for disease confined to the uterus and 16.5% for extrauterine disease. There was no difference in survival between homologous and heterologous tumors. The surgical staging and the autopsies reviewed documented widely disseminated disease even when the tumor appeared to be confined to the uterus. It thus appears essential in order to improve survival these patients require aggressive staging and consideration of systemic adjuvant chemotherapy.

Adult↗

PubMedDate not supplied

Primary ovarian cancer: prospective comparison of contrast-enhanced CT and pre-and postcontrast, fat-suppressed MR imaging, with histologic correlation.

Sixteen patients with clinically suspected malignant ovarian disease underwent contrast agent-enhanced computed tomography (CT) and magnetic resonance (MR) imaging in a prospective comparative study. MR imaging included fat-suppressed spin-echo and breath-hold FLASH (fast low-angle shot) before and after intravenous injection of gadopentetate dimeglumine. Histologic confirmation was obtained at laparotomy (n = 13) and biopsy (n = 3). Thirteen patients had histologically proven primary ovarian cancer. MR images showed the internal architecture of ovarian tumors better than CT in nine patients and equivalently in seven. MR images showed the relationship between ovarian tumors and adjacent pelvic structures (uterus [n = 9], sigmoid colon [n = 7], bladder [n = 7], and rectum [n = 3]) better than CT in nine patients and equivalently in seven. Intraabdominal extent of disease was better defined on MR than on CT images in nine patients, equivalently in six, and worse in one. Peritoneal metastases 1-2 cm in diameter were detected on MR images and missed on CT scans in six patients. In only one case did this result in a staging error with CT. The results suggest that MR imaging is at least equivalent and may be superior to CT in the evaluation of ovarian malignancy.

Abdominal Neoplasms↗

PubMedDate not supplied

Antiestrogens affect both pathways of killer cell-mediated oncolysis.

BACKGROUND: Our previous studies indicate that antiestrogenic drugs tamoxifen (TX) and toremifene (TO) augment immune oncolysis induced by various killer cells. The underlying mechanism(s), however, have not been fully elucidated. MATERIALS AND METHODS: Ovarian carcinoma cells freshly isolated from cancer patients and the human erythroleukemia cell line, K562 were used as targets for killer cells and/or the anti-Fas monoclonal antibody, CH-11 in 51Cr release assays. In a number of experiments, extracellular Ca++ was chelated by EGTA/MgCl2 to distinguish Ca(++)-dependent perforin/granzyme pathway from Fas/FasL pathway. Fas expression was studied by flow cytometry. RESULTS: Ovarian carcinoma cells were sensitized by antiestrogens towards enhanced cytolysis mediated by autologous cytotoxic lymphocytes. Antiestrogens also significantly augmented the killing of ovarian carcinoma cells triggered by anti-Fas monoclonal antibody. Flow cytometry analyses showed an upregulation of Fas (CD 95/Apo-1) upon TX or TO treatment in a number of cases. By contrast, antiestrogen treatment did not induce Fas expression in the Fas-negative K562 cells; yet, natural killer cell-mediated cytotoxicity against K562 was augmented by antiestrogens and maximal lysis was achieved when both target and effector cells were treated. The presence of Ca++ chelator (EGTA/MgCl2) in the assay abrogated killing of K562 and its antiestrogen--mediated augmentation. This indicates the involvement of the perforin/granzyme pathway. CONCLUSION: Antiestrogens can influence both Fas/FasL and perforin/granzyme pathways of killer cell--mediated oncolysis.

Endopeptidases↗