Being confronted with cancer is a life-changing event, with major impact to well-being, quality of life and relationships. Cancer treatments and outcomes have improved, but possess the potential to... Show moreBeing confronted with cancer is a life-changing event, with major impact to well-being, quality of life and relationships. Cancer treatments and outcomes have improved, but possess the potential to impair reproductive and sexual function. International guidelines highlight the importance of timely discussion of sexual function and fertility deterioration resulting from treatments. In spite of these developments, practice behaviour and attitudes of health professionals have been reported to vary.The first part of this thesis demonstrates barriers among oncology professionals in the Netherlands in discussing sexual function during daily practice. In general, consensus exists regarding responsibility for addressing sexual dysfunction. Despite, the implementation of discussing sexual function as a standard of care is not carried out structural.Part two describes practice routines concerning the counselling on impaired fertility and fertility preservation for cancer patients of reproductive age. Medical oncologists and oncology nurses both reported discussing the impact of treatment on fertility. However, it was not performed in all cases and depending on factors like educational level, experience, type of hospital, prognosis and chances of fertility recovery.Furthermore, testicular cancer patients were evaluated on specific items concerning the discussion, referral and process of semen cryopreservation. Long term reproductive concerns were identified among survivors. Show less
Cancer diagnosis and treatment may influence reproductive planning and impact fertility in patients of reproductive age. Although guidelines have been established in the past decade, education,... Show moreCancer diagnosis and treatment may influence reproductive planning and impact fertility in patients of reproductive age. Although guidelines have been established in the past decade, education, practice, and attitudes of medical oncologists regarding fertility preservation remain undecided. A nationwide survey was performed among members of the Dutch Society for Medical Oncology. Demographics, practice, knowledge, and barriers were measured regarding information provision of fertility preservation towards cancer patients of childbearing age. From 392 members, 120 oncologists completed the questionnaire (30.6%). Majority of oncologists was convinced it is their responsibility to discuss impact of cancer treatment to fertility (93.2%), yet 68.3% discussed the subject often or always (n = 82). Oncologists employed in district general hospitals were less likely to discuss fertility (p = 0.033). On average, 44.6% of reproductive men and 28.9% of reproductive women is referred to fertility specialists. Half of the respondents declared to possess sufficient knowledge regarding fertility preservation (n = 57, 47.5%). Poor prognosis (53%), unlikely survival (43.1%), and high chances on fertility recovery (28.7%) were identified as barriers to discussing fertility preservation. Among oncologists, impact of cancer treatment on fertility is a well-accepted responsibility to counsel. Despite, self-reported knowledge regarding fertility preservation is strongly varying. In practice, fertility is discussed to some extent, influenced by several barriers and depending on prognosis and type of hospital. Patients benefit from knowledge improvement among oncology care providers concerning fertility effects of cancer treatment. Education during medical school, residency, and among practicing oncologists may raise awareness, together with enhancement of referral possibilities. Show less
In dit proefschrift worden verschillende methodes onderzocht en uitgevoerd om de ovariële functie te sparen bij vrouwen die een behandeling moeten ondergaan als chemotherapie en/ of radiotherapie,... Show moreIn dit proefschrift worden verschillende methodes onderzocht en uitgevoerd om de ovariële functie te sparen bij vrouwen die een behandeling moeten ondergaan als chemotherapie en/ of radiotherapie, die de ovaria kunnen aantasten.Een behandeling is het invriezen van ovariumweefsel en indien een vrouw daadwerkelijk in de overgang is geraakt kan dit weefsel weer in haar eigen lichaam terug geplaatst worden. Het percentage vrouwen dat na ovarium cryopreservatie vervroegd in de overgang komt, is laag. Wij adviseren daarom enkel ovarium cryopreservatie aan te bieden aan vrouwen die door een gonadotoxische behandeling een hoog risico hebben op het ontwikkelen van vervroegde overgang. De autotransplantatie zelf is een effectieve methode met 86% herstel van ovariele functie en 57% levendgeborenen. Het risico van uitzaaiingen van de primaire ziekte in de ovaria bij patiënten met kanker is in onze studie zeer klein gebleken en is deze techniek dus een veilige methode.Ovariumtranspositie voorafgaand aan radiotherapie op het bekken is een veilige en zinvolle behandeling ter preventie van vervroegde overgang en zou standaard aangeboden moeten worden bij vrouwen tot 35 jaar.Met betrekking tot de reeds geaccepteerde techniek van vitrificatie dient men zicht te realiseren, dat alvorens deze techniek te implementeren, er een steile leercurve is. Show less
Autotransplantation of ovarian tissue can be used to restore fertility in cancer patients following gonadotoxic treatment. Whether this procedure is safe remains unclear, as current tumor... Show moreAutotransplantation of ovarian tissue can be used to restore fertility in cancer patients following gonadotoxic treatment. Whether this procedure is safe remains unclear, as current tumor detection methods (e.g. PCR analysis, immunohistochemistry) render the ovarian tissue unsuitable for transplantation. As a result, the current tumor detection approach includes assessment of only one or two cortical ovarian fragments that are not transplanted, whereas cortical ovarian tissue fragments that are placed back remain unchecked. The studies described in this thesis focused on determining the risk of reintroducing malignant tumor cells following ovarian tissue autotransplantation using the current tumor detection approach, and novel detection methods by which metastatic disease can be detected in the cortical ovarian fragments that are actually transplanted. These novel detection methods include near-infrared fluorescence (NIRF) imaging, a noninvasive imaging technique by which tumor cells can be specifically illuminated using tumor-targeting probes in the near-infrared range (λ = 700-900 nm), and full field optical coherence tomography, an imaging modality that rapidly produces high-resolution histology-like images without the need to fix, freeze, or stain the tissue. Show less
