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Biomedical subjects

A A W Peters

Publications and source records attributed to A A W Peters.

10 recordsLinked to original sources
PubMed2006

The number of pelvic lymph nodes in the quality control and prognosis of radical hysterectomy for the treatment of cervical cancer.

AIMS: To determine if the number of removed lymph nodes in radical hysterectomy with lymphadenectomy (RHL) influences survival of patients with early stage cervical cancer and to analyze the relation of different factors like patient age, tumour size and infiltration depth with the number of nodes examined in node-negative early stage cervical cancer patients. METHODS: Of consecutive patients, who underwent RHL between January 1984 and April 2005, 331 had negative nodes (group A) without adjuvant therapy and 136 had positive nodes (group B). The Kaplan-Meier method and Cox regression model were used to detect statistical significance. Factors associated with excision of nodes were confirmed with linear regression models. RESULTS: The median number of removed nodes was 19 and 18 for group A and group B, respectively. There was no significant relationship between the number of removed nodes and the cancer specific survival (CSS) or disease free survival (DSF) for patients of group A (p=0.625 and p=0.877, respectively). The number of removed nodes in group B was not significantly associated with the CSS (p=0.084) but it was for the DSF (p=0.014). Factors like patient age, tumour size and infiltration depth were not associated with the number of nodes. CONCLUSIONS: No relation was found between the number of negative nodes examined after RHL for the treatment of early stage cervical cancer and CSS or DFS. However, a higher amount of removed lymph nodes leaded to a better DFS for patients with positive nodes. It is suggested that patients with positive nodes benefit from a complete pelvic lymphadenectomy and a sufficient yield of removed nodes.

Adult↗
PubMed2006

[Three patients with differing manifestations of uterine sarcoma].

A 70-year-old woman with postmenopausal blood loss proved to have a stage-IV high-grade endometrial stromal sarcoma; 9 months after resection the patient was well. In a 53-year-old woman with symptoms of neurological deficit and weight loss accompanying an increase in abdominal girth and postmenopausal vaginal blood loss a high-grade leiomyosarcoma at stage IV was diagnosed. Despite treatment the neurological symptoms worsened and the patient died within 2 months of diagnosis. Another woman, aged 53, with abdominal pain but no blood loss proved to have a high-grade leiomyosarcoma at stage 1. Nine months after resection and radiotherapy the patient was well. The incidence of carcinomas of the uterus in The Netherlands is on average 113 women per year. They manifest themselves in different ways which can sometimes be misleading. The most common symptom is vaginal bleeding, in combination with abdominal pain or a pelvic mass. The only curative therapy is surgical excision. The 5-year survival rate is 50% in tumours confined to the uterus as opposed to 20% in those that spread further.

Aged↗
PubMed2005

Psychosocial factors and the course of cervical intra-epithelial neoplasia: a prospective study.

OBJECTIVE: To investigate the influence of psychosocial factors on the course of cervical intra-epithelial neoplasia (CIN). METHODS: A group of 93 patients with CIN 1 or 2 was followed for 2.25 years by half-yearly colposcopy and cytology. Negatively-rated life events, social support, and coping style were studied in relation to distress during follow-up and in relation to time till progression and regression of CIN. Human papillomavirus (HPV) infection was controlled for as well as sick role bias caused by suspicion of having cervical cancer and distress due to the abnormal cervical smear. RESULTS: During follow-up, progression was found in 20 patients (22%), stable disease in 22 patients (24%), and regression in 51 patients (55%). Negatively-rated life events and lack of social support predicted distress longitudinally. No association was found between progression or regression of CIN and negatively-rated life events, lack of social support, coping style, and distress. CONCLUSION: We found no evidence that psychosocial factors influence the course of CIN.

Adaptation, Psychological↗
PubMed2004

Prognostic difference of surgical treatment of exophytic versus barrel-shaped bulky cervical cancer.

OBJECTIVE: The aim of the study was to evaluate the prognostic significance of tumor geography, defined as exophytic or barrel-shaped growth, in bulky (>4 cm) cervical cancer. METHODS: Four hundred women with cervical cancer, treated by primary radical hysterectomy between January 1984 and November 2000, were followed in a prospective cohort study. Clinical and pathology data were stored in a databank and the clinical protocol was unchanged during the study except for the amendment of additional indications of postoperative radiation in 1997. The assessment of tumor geography was based on pelvic examination at the time of tumor staging or radical hysterectomy or from the pathology report. Survival probabilities were calculated by the Kaplan-Meier method and compared with the log-rank test. RESULTS: The mean age of the patients was 45 years and the mean follow-up duration 48 months. Tumors were of squamous cell type in 291 patients (73%). Lymph node metastases were present in 91 patients (24%) and postoperative radiation was given in 179 patients (45%). In 291 patients, tumor diameter was <4 cm; in 58 patients, the tumor was defined as bulky exophytic and in 51 patients as bulky barrel shaped. There were no differences among these three groups in terms of operating time, blood loss during surgery or complications at 3 or 6 months postoperatively. Bulky exophytic tumors had an identical overall survival as compared to small-diameter (<4 cm) tumors. The overall survival (OS) of bulky barrel-shaped tumors was significantly worse (P < 10(-4)). The same was found for disease-free survival (DFS). CONCLUSION: Bulky exophytic cervical cancer has an identical surgical morbidity, overall and disease-free survival as compared to nonbulky (<4 cm) cervical cancer. In view of these identical characteristics, primary surgical treatment should be considered for patients with bulky exophytic cervical cancer.

Adult↗
PubMed2004

Long-term outcomes and quality of life after laparoscopic adhesiolysis for chronic abdominal pain.

STUDY OBJECTIVE: To evaluate clinical outcome in terms of pain and quality of life after laparoscopic adhesiolysis. DESIGN: Prospective observational study (Canadian Task Force II-3). SETTING: University-affiliated medical center. PATIENTS: Twenty-three patients (22 women). INTERVENTION: Laparoscopic adhesiolysis for chronic abdominal pain. MEASUREMENTS AND MAIN RESULTS: Pain was assessed by validated McGill score. Patients with an intraindividual decrease in pain score of 5 points or more were considered successes. Quality of life was assessed by the SF-36 and gastrointestinal quality of life index. Patients were evaluated before and at intervals until 2 years after adhesiolysis. The mean pain score before adhesiolysis was 30.5 (range: 17-40). At 2 years of follow-up, 10 (45%) of 22 patients (95% CI 0.244-0.678) were considered successes. They reported significant improvement in quality of life on scales physical, role physical, and social function, and fewer gastrointestinal symptoms. Twelve women (55%) had a complete relapse, and most were not motivated to visit the pain clinic after 6 months. CONCLUSION: Laparoscopic adhesiolysis for chronic abdominal pain was successful in only 45% of patients.

Abdomen↗
PubMed2003

Visualising scanning patterns of pathologists in the grading of cervical intraepithelial neoplasia.

AIM: To investigate how effectively eye tracking devices can visualise the scanning patterns of pathologists, for application in studies on diagnostic decision making. METHODS: EyeCatcher, an eye tracking device, was used to visualise and compare the scanning patterns of five pathologists while they graded two projections of cervical intraepithelial neoplasia. Density cloud images were created from the scanning patterns. A questionnaire and interview provided information on the following steps in the diagnostic process. RESULTS: EyeCatcher successfully registered the scanning patterns of the pathologists. A "scanning style" and a "selective style" of visual search were distinguished. The scanning patterns, in addition to the interpretation and combination of the information ultimately leading to a diagnosis, varied between the various observers, resulting in a broad range of final diagnoses. CONCLUSIONS: Eye gaze tracking devices provide an excellent basis for further discussion on the interpretation and grading criteria of lesions. As such, they may play an important role in studies on diagnostic decision making in pathology and in the development of training and quality control programmes for pathologists.

Decision Making↗
PubMedDate not supplied

Postoperative complications after vulvectomy and inguinofemoral lymphadenectomy using separate groin incisions.

The focus of this study was to document postoperative complications after vulvectomy and inguinofemoral lymphadenectomy using separate incisions. Data from 172 consecutive patients with newly diagnosed carcinoma of the vulva were studied. One hundred and one patients primarily treated with modified radical vulvectomy and complete inguinofemoral lymphadenectomy using separate groin incisions (n = 187) were included in this study. One or more complications were documented in 77 of the 101 (76%) patients. Complications after groin dissection were observed in 66% of the patients. The main complications were wound breakdown (17%) and/or infection (39%) of the groin, lymphocyst formation (40%), and lymphedema (28%). In 98 of 187 (52%) groin dissections, one or more complications were documented. The presence of lymph node metastases, postoperative radiation, age older than 65 years, and removal of the vena saphena magna were not significant risk factors for the occurrence of complications. The occurrence of early complications after groin dissection was significantly related to the late-complication lymphedema (P = 0.002). Our results confirm relatively high rates of wound breakdown, infection, lymphocyst formation, and lymphedema even with separate groin incisions. The occurrence of early complications was related to lymphedema. No other risk factors could be identified.

Age Distribution↗
PubMedDate not supplied

Postoperative radiation therapy improves prognosis in patients with adverse risk factors in localized, early-stage cervical cancer: a retrospective comparative study.

The objective of this study was to assess the role of postoperative radiotherapy (RT) in early-stage cervical carcinoma with risk factors other than positive nodes, parametrial invasion, or positive margins and to compare outcomes using the Leiden University Medical Center (LUMC) modification of the Gynecologic Oncology Group (GOG) system with the GOG prognostic scoring system itself. Between January 1984 and April 2005, 402 patients with early-stage cervical cancer underwent radical hysterectomy. A total of 51 patients (13%) had two of the three risk factors and had pathologic tumor size (> or =40 mm), invasion (> or =15 mm), and capillary lymphatic space involvement, and were identified as the so-called high-risk (HR). We compared 34 patients who received RT based on the LUMC risk profile (67%) with 17 who did not (33%). The GOG score was calculated as well. We compared the GOG scores within the LUMC risk groups: HR+ (two out of three risk factors) and HR- (less than two out of three risk factors). Differences in 5-year cancer-specific survival (CSS) and 5-year disease-free survival (DFS) between the HR group treated with RT (86%, 85%) and without RT (57%; 43%) were statistically significant. The LUMC criteria did not significantly differ from the GOG risk profile, concerning recurrence, CSS, and DFS. HR patients benefit from adjuvant RT. The LUMC modification of the GOG system seems to be simpler and has a slightly higher threshold for the indication for RT but without a difference in outcome.

Adult↗
PubMedDate not supplied

Human papillomavirus type 18 and other risk factors for cervical cancer in Jakarta, Indonesia.

Infection with human papillomavirus (HPV) has now been established as a necessary cause of cervical cancer. Indonesia is a country with a high cervical cancer incidence and with the world's highest prevalence of HPV 18 in cervical cancer. No information exists about the prevalence of HPV 18 or other HPV types in the Indonesian population. We conducted a hospital-based case-control study in Jakarta, Indonesia. A total of 74 cervical carcinoma cases and 209 control women, recruited from the gynecological outpatient clinic of the same hospital, were included. All women were HPV typed by the line probe assay, and interviews were obtained regarding possible risk factors for cervical cancer. HPV was detected in 95.9% of the cases and in 25.4% of the controls. In the control group, 13.4% was infected with a high-risk HPV type. HPV 16 was detected in 35% of the case group and in 1.9% of the control group and HPV 18 was identified in 28% of the case group and in 2.4% of the control group, suggesting that the oncogenic potentials of HPV 16 and HPV 18 in Indonesia are similar. In addition to HPV infection, young age at first intercourse, having a history of more than one sexual partner, and high parity were significant risk factors for cervical cancer. Within the control group, we did not identify determinants of HPV infection. We hypothesize that the high prevalence of HPV 18 in cervical cancer in Indonesia is caused by the high prevalence of HPV 18 in the Indonesian population.

Adult↗