Neoadjuvant concomitant chemoradiotherapy has become a standard treatment of locally advanced rectal adenocarcinomas (LARA). It leads to shrinkage of the tumor mass and subsequently to an increase in complete resections (R0 resections), increasing a feasibility of sphincter-sparing intervention avoiding colostomy. It is based on concurrent application of fluoropyrimidines (5-fluorouracil, capecitabine) and radiotherapy (45 - 50,4 Gy). It shows less acute toxicity and improves local control rate in comparison to adjuvant treatment. Unfortunately, neoadjuvant chemoradiotherapy is not beneficial for all patients. The treatment response ranges from a complete pathological remission (pCR, ypT0ypN0) to a resistance. It is reported that cca 15 percent of patients with advanced rectal cancer show pCR which is indicative of improved long-term prognosis. DESIGN: The following is a review of the significance of neoadjuvant concomitant chemoradiotherapy in the treatment algorithm of patients with LARA and summary of potentional clinical-pathological and molecular markers of response prediction to neoadjuvant therapy. The most important clinical studies concern serum tumor markers levels, clinical lymph node classification. The components of the carcinogenic pathways are explored, including oncogenes, tumor supressor genes, microsatellite instability (MSI) and potentional markers involved in apoptosis, angiogionesis, proliferation as well as metastasis and invasion, are reviewed. Finally, the role of specific enzymes associated with the metabolism of fluoropyrimidines are examined. CONCLUSIONS: No one marker has been consistently identified as clinically applicable. Studies designed to determine the potentional markers are hampered by various techniques as well as tumor heterogenity and recent scientific approach--studying individual molecular markers. Gene expression profiling analysis of multiple genes from the same tumor is becoming reality. We suppose that this assessment will lead in future in finding combination of markers for predicting prognosis and response to therapy in rectal cancer., Garajová Ingrid, Svoboda M., Slabý O., Kocáková L., Fabian P., Kocák I., Vyzula R., and Lit.: 71
Karcinóm prsníka je príkladom rýchleho rozvoja vedeckých poznatkov, začínajúc od molekulárnej diagnostiky a končiac cielenou liečbou na molekulárnej úrovni. Neoadjuvantná chemoterapia je indikovaná u veľmi heterogénnej skupiny nádorov. O type liečby rozhoduje nielen biologická variabilita (stav receptorov, stav HER-2), ale tiež individuálna variabilita (PS, vek, komorbidita, rozsah ochorenia). Primárna systémová liečba (neoadjuvantná, indukčná, iniciálna) je dnes štandardná pre lokálne pokročilé nádory a niektoré vybrané operabilné typy karcinómov prsníka. Pre neuspokojivú liečebnú odpoveď sa hľadajú nové režimy s iným konceptom dávkovej intenzity, denzity, sekvencie. V neoadjuvancii je možné využiť všetky necielené aj cielené liečebné metódy na podklade výsledkov mnohých klinických štúdií., Breast cancer is a model of quickly development scientific knowledges begining from molecular diagnostic and termination with targeted therapies on the molecular level. Neoadjuvant chemotherapy is indicated for very heterogeneous group of tumours. Treatment type is decided not only by biologic variability (receptor status, HER-2 status) but with individual variability (PS, comorbidity, extent of illness). Primary systemic treatment (neoadjuvant, induction, inicials) is standard treatment for locally advanced tumor and for some eligible type of surgery breast cancer, too. If treatment response is not satisfied it is necessary to look for new treatment regimens with different concept of dose intensity, density and sequence of treatment. In the neoadjuvant setting it is possible to employ all targeted and non-targeted therapies as was shown in a number of clinical trials., Mária Wagnerová, and Literatura 39