Magyar onkologia
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The last several years have seen extraordinary progress in the management of patients with castration resistant prostate cancer (CRPC). Although metastatic prostate cancer remains an incurable disease, substantial advances have been made in therapeutic options. Development of novel agents that modulate the androgen receptor pathway, growth factor signalling pathways, and immune function and bone targeting pathways has been the focus of therapeutic strategies because of its significance in the biology of prostate cancer progression. ⋯ Based on phase III clinical trials cabazitaxel, abiraterone acetate, sipuleucel-T and denosumab represent available therapeutic options in this setting, radium-223 chloride and MDV3100 demonstrated a survival advantage in phase III trials and the road for their introduction in clinical practice is rapidly ongoing. Results are also awaited for phase III studies currently underway or planned with new drugs given as monotherapy (TAK-700, cabozantinib, tasquinimod, PROSTVAC-VF, ipilimumab) or in combination with docetaxel (custirsen, aflibercept, dasatinib, zibotentan), while other emerging molecules have shown hopeful results. The aim of this review is to summarize the most important new findings for metastatic CRPC (mCRPC) according to the different molecular pathways and to discuss their potential influence on future management of this disease.
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The aim of the study was to implement accelerated partial breast irradiation (APBI) by means of three-dimensional conformal radiotherapy (3D-CRT) following breast-conserving surgery (BCS) for early-stage breast cancer. Between December 2006 and February 2011, in 45 cases of low-risk, stage I-II breast cancer the tumour bed was marked with titanium clips during BCS. Postoperative APBI was given by means of 3D-CRT using 3 to 5 non-coplanar fields. ⋯ Grade 1 fibrosis, grade 2 teleangiectasia and asymptomatic fat necrosis occurred in 4 (13.3%), 1 (3.3%) and 5 (16.7%) patients, respectively. No grade 3-4 late side effects were detected. 3D-CRT is a reproducible and feasible technique for the delivery of APBI following conservative surgery for the treatment of low-risk, early-stage invasive breast carcinoma. The preliminary results are promising, early- and mid-term radiation side effects are rare, and cosmetic results are excellent.
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Comparative Study
[Comparison of CT- and MRI-based clinical target volumes for 3-dimensional conformal external-beam radiotherapy of prostate cancer].
The aim of the study was to compare clinical target volumes defined by CT and MRI for 3 dimensional conformal external beam radiotherapy of prostate cancer. CT and T2-weighed MRI images with 3 mm slice thickness were acquired for 13 patients with clinically organ-confined prostate cancer. Target volumes were contoured by two clinicians ("AP" and "SZ") experienced in prostate radiotherapy. ⋯ Clinical target volumes defined for prostate cancer external beam radiotherapy by MRI images are significantly smaller compared to CT image based contouring. The magnitudes of differences are observer dependent. The use of MRI decreases the interobserver difference of mean volumes with 11% and 12% for CTVpvs and CTVpros.