[Influence of preoperative chemoradiotherapy on changes of epidermal growth factor receptor expression in patients treated by preoperative chemoradiotherapy for local advanced rectal carcinoma]. / Vliv predoperacní chemoradioterapie na zmenu exprese receptoru pro epidermální rustový faktor u pacientu lécených predoperacní chemoradioterapií pro lokálne pokrocilý karcinom rekta.

AIM: The aim of this retrospective study was to determine the prognostic impact of expression of epidermal growth factor receptor (EGFR) changes during neoadjuvant chemoradiotherapy in patients with locally advanced rectal adenocarcinoma. MATERIAL AND METHODS: One hundred and three patients with locally advanced rectal adenocarcinoma of stage II and III were evaluated. All patients were administered the total dose of 44 --  50.4 Gy. Concomitantly, the patients received capecitabine in the dose 825 mg/ m² in two daily oral administrations or 5- fluorouracil in the dose 200 mg/ m² in continuous infusion. Surgery was indicated at intervals of 4-8 weeks from chemoradiotherapy completion. EGFR expression in the pretreatment biopsies and in resected specimens was assessed with immunohistochemistry. RESULTS: All of 103 patients received radiotherapy without interruption up to the total planned dose. Downstaging was described in 64 patients. Six patients had complete pathologic remission. Recurrence occurred in 49 patients. Local recurrence was found in 22 patients, generalization of disease was reported in 27 patients. A total of 51 patients died. Increased EGFR expression was found in 26 patients. The statistically significantly shorter overall survival (p < 0.001) and disease-free survival (p < 0.001) was found in patients with increased expression of EGFR compared with patients where no increase in the expression of EGFR was observed during neoadjuvant chemoradiotherapy. CONCLUSIONS: The overexpression of EGFR during neoadjuvant chemoradiotherapy for locally advanced rectal adenocarcinoma is associated with significant shorter overall survival and disease-free survival.

Weekly paclitaxel combined with local hyperthermia in the therapy of breast cancer locally recurrent after mastectomy--a pilot experience.

BACKGROUND: The combination of chemotherapy and hyperthermia (HT) is a promising approach in the treatment of malignant tumors. In the present report we evaluate the efficacy and toxicity of a combination of weekly paclitaxel combined with local hyperthermia in breast cancer. PATIENTS AND METHODS: 7 patients were treated for inoperable local recurrence of breast cancer after mastectomy, irradiation, and chemotherapy or hormonal therapy. They weekly received paclitaxel (60-80 mg/m(2)) in 3-h infusions followed by local HT 41-44 degrees C for 45 min for 6-18 cycles. RESULTS: Objective local response was observed in all treated patients (complete response in 4 patients and partial response in 3 patients). There were no grade 3 or 4 toxicities, neurologic toxicity or hypersensitivity reactions. Local tolerance to this regimen was also good, with only 4 patients developing mild transient erythema. CONCLUSION: Our experience indicates that the combination of weekly paclitaxel and HT may be effective in the treatment of locally recurrent breast cancer after mastectomy.

Liposomal doxorubicin combined with regional hyperthermia: reducing systemic toxicity and improving locoregional efficacy in the treatment of solid tumors.

Incorporation of doxorubicin into polyethylene glycol-coated (pegylated) liposomes increases the therapeutic index, prolongs circulation time and enhances tumor localization. Pegylated liposomal doxorubicin (PLD) is an established therapeutic agent in epithelial ovarian carcinoma (EOC), breast carcinoma or Kaposi's sarcoma, and PLD administration results in reduction of toxicity. Addition of regional hyperthermia increases liposome extravasation, induces the doxorubicin release from the liposomes, and the combination of hyperthermia and doxorubicin itself may be supra-additive, resulting in enhanced antitumor efficacy in the heated region. Encouraging results have been reported for the combination of PLD and hyperthermia in EOC, breast carcinoma and hepatocellular carcinoma.

Pegylated liposomal doxorubicin in combination with hyperthermia for treatment of skin metastases of breast carcinoma: a case report.

BACKGROUND: Incorporation of doxorubicin hydrochloride into pegylated liposomes (PLD) may decrease chemotherapy side effects and increase the activity. Hyperthermia could further potentiate its effectiveness. CASE REPORT: A patient with skin metastases of breast carcinoma was treated with intravenous infusion of PLD (Caelyx) in combination with ultrasound hyperthermia. Each cycle consisted of infusion of 40 mg PLD absolute dose, followed by 2 fractions of hyperthermia 41-43 degrees C for 45 min 1 and 48 h after infusion. A complete remission was observed after the combination treatment with no significant toxicity. CONCLUSION: Present observations suggest that the combination of PLD with hyperthermia of skin metastases of breast carcinoma may be an active and well tolerated treatment.

Management of inoperable carcinoma of the breast by curative radiotherapy and chemo-hormonotherapy.

BACKGROUND: The aim of this study was to evaluate local control and its relation to survival in patients with locally advanced breast cancer treated with curative irradiation and systemic therapy. PATIENTS AND METHODS: 240 patients with unresectable breast cancer were treated with curative radio- and chemo- or hormonotherapy from 1990-1995. The frequency of distant dissemination and the overall survival of patients with and without complete local control were compared. RESULTS: Complete local control was achieved in 63% of patients. Complete local control correlated with decrease of distant metastases and increase of survival in comparison with patients without complete local control. CONCLUSION: Radiotherapy without surgery provides insufficient local control in patients with locally advanced breast cancer. Complete local control is an important factor for prevention of distant dissemination and for survival.

Endovascular brachytherapy potentiated by hyperthermia in the prevention of vascular restenosis. A case report.

BACKGROUND: The combination of hyperthermia and radiotherapy has additive or synergistic effects. This combination has been studied extensively in radiation oncology, but not in the prevention of vascular restenosis. CASE REPORT: A patient with restenosis of cephalic vein underwent percutaneous transluminal angioplasty (PTA) followed by endovascular irradiation with 192Iridium (12 Gy) using a high dose rate afterloading technique. After endovascular irradiation, one fraction of external ultrasound hyperthermia was administered to the irradiated segment. There was no restenosis in the treated vessel segment according to duplex sonography performed 192 days after treatment. No radiation or hyperthermia associated side effects were observed. CONCLUSIONS: Present observations suggest that endovascular brachytherapy of restenosis potentiated by hyperthermia is a technically feasible and well-tolerated treatment. The additive and synergistic effects of hyperthermia, in conjunction with radiation, could be of benefit in the prevention of vascular restenosis.