Publications by authors named "Kostas Kalbakis"

Front-line bevacizumab (BEV) in combination with taxanes offers benefit in progression-free survival (PFS) in metastatic breast cancer (mBC). The medical records of mBC patients, treated with front-line BEV-based chemotherapy, were retrospectively reviewed in order to generate real life safety and efficacy data. Patients with human epidermal growth factor receptor 2 (HER2)-negative mBC treated with front-line BEV in combination with chemotherapy were eligible.

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Article Synopsis
  • * Results show that CTC positivity at baseline is linked to shorter overall survival rates and predicts early recurrence, but not late recurrence, suggesting its prognostic impact varies over time.
  • * Additionally, most patients transitioned from CTC-positive to CTC-negative after chemotherapy treatment, indicating CTC detection can inform potential new treatment strategies.
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Background: Evaluation of safety of the weekly intravenous gemcitabine/topotecan combination as salvage treatment in patients with recurrent epithelial ovarian cancer.

Methods: Twenty-four women with histologically-proven relapsed ovarian cancer (ROC) were enrolled in the study. Topotecan (1.

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Background: This study evaluated the safety and efficacy of nab-paclitaxel as second-line treatment in patients with advanced gastric adenocarcinoma.

Methods: Thirty-nine pretreated patients [33 with taxane-based regimens (docetaxel, cisplatin, and fluorouracil)] and 6 with combination of fluoropyrimidines plus cisplatin with locally advanced inoperable and metastatic gastric and gastroesophageal junction adenocarcinoma were treated with weekly nab-paclitaxel (150 mg/m d1, d8, d15 in cycles of 28 days).

Results: Partial response (PR) was documented in nine patients (23.

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Background: To evaluate the efficacy of lapatinib, a dual EGFR and HER2 tyrosine kinase inhibitor, in therapy-resistant HER2-positive CTCs in metastatic breast cancer (MBC).

Patients And Methods: Patients with MBC and HER2-positive CTCs despite disease stabilization or response to prior therapy, received lapatinib 1500 mg daily in monthly cycles, till disease progression or CTC increase. CTC monitoring was performed by immunofluorescent microscopy using cytospins of peripheral blood mononuclear cells (PBMCs) double stained for HER2 or EGFR and cytokeratin.

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Introduction: Clinical dormancy is frequently observed in breast cancer. In the present study, we aimed to characterize circulating tumor cells (CTCs) in dormancy candidates (DC) with early breast cancer in terms of proliferation and apoptosis.

Methods: Cytospins of peripheral blood mononuclear cells (PBMCs) were obtained from DC (n = 122) who were disease-free for at least 5 years and from metastatic patients (n = 40) who relapsed more than 5 years after surgery.

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Purpose: To evaluate the safety and antitumor activity of docetaxel (DOC) and pegylated liposomal doxorubicin (PLD) combination in patients with platinum- and taxane-sensitive ovarian cancer.

Patients And Methods: Twenty-three patients were enrolled. DOC was administered at the dose of 40 mg/m(2) intravenously (i.

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Background: Skin and soft tissue infections (SSTIs) in cancer patients represent a diagnostic challenge, as etiologic diagnosis is often missing, and clinical assessment of severity is difficult. Few studies have described (SSTIs) in patients with solid tumours (STs).

Patients And Methods: Records of patients with ST and SSTI, cared for at the University Hospital of Heraklion, from 2002 to 2006 were retrospectively studied.

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Background And Aim: Cancer cachexia is a metabolic syndrome related with poor outcome. Cytokines play a key role in the pathophysiology of that syndrome. The aim of this study was to investigate the potential correlations between nutritional status, systemic inflammation, and psychological distress in cancer patients.

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Background: The detection of cytokeratin-19 (CK-19) mRNA-positive circulating tumor cells (CTC) before and/or after adjuvant chemotherapy in patients with operable breast cancer is associated with poor clinical outcome. Reliable prognostic markers for late disease relapse are not available. In this study we investigated the value of CTC detection during the first five years of follow-up in predicting late disease relapse.

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Purpose: To determine the dose-limiting toxicities (DLTs) and the maximum tolerated doses (MTD) of oral metronomic vinorelbine with capecitabine in patients with metastatic breast cancer (MBC).

Patients And Methods: Escalated doses of oral metronomic vinorelbine (starting dose 30 mg) every other day continuously and capecitabine (starting dose 800 mg/m(2) bid) on days 1-14 every 21 days were administered. DLTs were evaluated during the first cycle.

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Background: Platinum-based chemotherapy represents the standard of care for advanced non-small cell lung cancer (NSCLC) while non-platinum-based regimens are frequently administered in patients with relapse. A retrospective analysis of the sequence administration of these regimens in the first- and second-line setting was performed.

Patients And Methods: The records of patients enrolled in the Hellenic Oncology Research Groups's randomized advanced NSCLC trials from February 1997 to September 2006 were retrospectively reviewed.

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Background: Weekly paclitaxel (P) in combination with bevacizumab (B) is an effective regimen as initial treatment of metastatic breast cancer (MBC). We investigated in a phase II study the activity of the same regimen as salvage therapy in MBC.

Methods: Pretreated women with MBC received weekly P (90 mg/m(2) days 1, 8, 15) and B (10 mg/kg days 1, 15) every 28 days.

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Purpose: To evaluate efficacy and toxicity of a combination of pegylated liposomal doxorubicin and irinotecan in patients with refractory small-cell lung cancer.

Patients And Methods: Thirty-one patients with early relapse after first-line therapy with cisplatin/etoposide were treated with pegylated liposomal doxorubicin 15 mg/m(2) and irinotecan 125 mg/m(2) on days 1 and 15. Treatment was repeated every 28 days.

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Aim: To compare the efficacy and tolerance of sequential versus alternate front-line administration of cisplatin-etoposide (PE) and topotecan (T) in patients with extensive stage small cell lung cancer (SCLC).

Patients And Methods: Patients were randomized to receive either 4 cycles PE (cisplatin 80 mg/m(2) i.v.

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Purpose: To investigate the efficacy and toxicity of the docetaxel and capecitabine combination in patients with previously treated, unresectable adenocarcinoma of the pancreas.

Patients And Methods: Patients with pancreatic adenocarcinoma, pre-treated with gemcitabine-based chemotherapy, were treated with capecitabine (800 mg/m(2) orally, twice a day for 14 days) and docetaxel (75 mg/m(2) i.v, on day 1), every 3 weeks.

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A randomized multicenter phase III study was conducted to compare the sequential docetaxel followed by epirubicin/cyclophosphamide combination with that of FEC regimen as adjuvant chemotherapy in women with axillary node-positive early breast cancer. Seven hundred and fifty-six women with axillary lymph node-positive breast cancer were randomized to receive either 4 cycles of docetaxel (100 mg/m(2)) followed by 4 cycles of epirubicin (75 mg/m(2)) plus cyclophosphamide (700 mg/m(2)) (experimental arm) or 6 cycles of FEC (epirubicin 75 mg/m(2), cyclophosphamide 700 mg/m(2), and 5-fluorouracil 700 mg/m(2); control arm). All regimes were administered every 3 weeks.

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Purpose: To evaluate the prognostic significance of cytokeratin-19 (CK-19) mRNA-positive circulating tumor cells (CTCs) in peripheral blood of women with early-stage breast cancer after the completion of adjuvant chemotherapy.

Patients And Methods: Blood was obtained from 437 patients with early breast cancer before the start and after the completion of adjuvant chemotherapy, and the presence of CK-19 mRNA-positive CTCs was assessed by real-time reverse transcriptase polymerase chain reaction. Interaction with known prognostic factors and association of CTCs with clinical outcome were investigated.

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Objective: To determine the maximum tolerated doses (MTDs) and dose limiting toxicities (DLTs) of gemcitabine (GEM), docetaxel (DOC) and carboplatin (CARBO) combination.

Patients And Methods: A total of 33 previously untreated HER-2 negative patients with stage IIIB-IV breast cancer received escalated doses of GEM, DOC and CARBO all given sequentially on day 1 every 2 weeks. Twenty-three patients (70%) had previously received adjuvant or neoadjuvant chemotherapy.

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Purpose: Temozolomide, a novel triazene derivative, has shown activity in vitro against lung cancer as well as against brain metastases from a variety of solid tumors including non-small cell lung cancer (NSCLC). The aim of the study was to evaluate the efficacy and safety of temozolomide in pretreated patients with NSCLC.

Patients And Methods: Thirty-one pretreated patients (median age 60 years) with histologically confirmed NSCLC were enrolled.

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Purpose: To determine the tolerability and efficacy of the combination of gefitinib with gemcitabine plus vinorelbine in metastatic breast cancer (MBC) patients, pretreated with anthracyclines and taxanes.

Patients And Methods: Women with measurable MBC pretreated with anthracycline- and taxane-based chemotherapy received oral gefitinib (250 mg/day) continuously combined with intravenous gemcitabine 1000 mg/m2 and vinorelbine 25 mg/m2 on day 1, every 2 weeks. The first 10 enrolled patients were evaluated for the safety and tolerability of the proposed fixed-dose regimen.

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To evaluate whether HER2 mRNA could be used as a marker of circulating tumor cells (CTCs) in women with operable breast cancer. A nested RT-PCR assay was developed and used for the detection of HER2 mRNA-positive CTCs. Blood from 216 women with early breast cancer obtained before adjuvant treatment was tested for HER2 mRNA-positive cells to assess their prognostic value.

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The aim of this study was to evaluate the safety and activity of a gemcitabine-oxaliplatin combination (GEMOX) regimen in pretreated patients with advanced ovarian cancer. Twenty-seven platinum-refractory/resistant and 14 platinum-sensitive patients received gemcitabine 1500 mg/m2 intravenously in days 1+8 and oxaliplatin 130 mg/m2 in day 8 every 21 days. Ten responses (one complete, nine partial) were observed; five in platinum-sensitive and five in platinum-resistant tumors.

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Purpose: To evaluate the maximum tolerated doses (MTD) and the dose-limiting toxicities (DLT) of the combination of pegylated liposomal doxorubicin (PEG-LD), paclitaxel and oxaliplatin (L-OHP) administered every 2 weeks in patients with advanced solid tumors.

Methods: Thirty-nine pretreated patients with advanced solid tumors received escalated doses of PEG-LD (10-16 mg/m(2)), paclitaxel (100-120 mg/m(2)) and L-OHP (50-70 mg/m(2)) every 2 weeks. As one cycle of treatment was considered the administration of both drugs on days 1 and 15 of a 4-week cycle.

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Purpose: To evaluate the efficacy and tolerance of the docetaxel/gefitinib combination as second-line treatment in patients with advanced pancreatic cancer.

Patients And Methods: Twenty-six patients pretreated with gemcitabine-based chemotherapy were enrolled in the study. Docetaxel (75 mg/m(2), i.

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