Tanja Mesti

Digital ischemic events related to gemcitabine: Report of two cases and a systematic review

Digital ischemic events related to gemcitabine: Report of two cases and a systematic review Background. Gemcitabine is a potent cytotoxic agent used in the treatment of many solid tumours, sarcomas and lymphomas. Vascular toxicity and thrombotic events related to gemcitabine seem to be underreported. Case report. We report two cases of gemcitabine related digital ischemic events. Case 1. A 65-year-old man was given the first-line treatment with gemcitabine for the advanced adenocarcinoma of pancreas. After four weekly doses of gemcitabine (total dose 4000 mg/m2) he presented with Raynauds like phenomenon and ischemic fingertips necrosis in five digits of both hands. Symptoms resolved in all but one digit after stopping chemotherapy and treatment with iloprost trometamol infusion. Case 2. A 77-year-old man, ex-smoker, was administered a combination of gemcitabine and cisplatin as the first-line treatment for the locally advanced bladder cancer. After 4 cycles of the treatment (total dose of gemcitabine 4000 mg/m2) the patient suffered digital ischemia and necrosis on two digits of a right leg. Arteriography revealed preexisting peripheral arterial occlusive disease (PAOD) of both legs with very good peripheral collateral circulation and absent microcirculation of affected two digits. The gemcitabine treatment was stopped and the patient was treated with iloprost trometamol infusion and percutaneous transluminal angioplasty with dilatation of the right superficial femoral artery. Digital changes resolved without consequences. Severe thrombocytosis (platelet count 1211 × 109/L) might have also contributed to the ischemic digital event in the second case. Conclusions. Digital ischemic events associated with gemcitabine chemotherapy seem to be more common in patients with tobacco-associated cancers, especially when used in combination with platinum salt. The treatment with gemcitabine in patients with evolving Raynauds phenomenon and/or preexisting PAOD should be done with caution.

Metabolic Impact of Anti-Angiogenic Agents on U87 Glioma Cells

Background Glioma cells not only secrete high levels of vascular endothelial growth factor (VEGF) but also express VEGF receptors (VEGFR), supporting the existence of an autocrine loop. The direct impact on glioma cells metabolism of drugs targeting the VEGF pathway, such as Bevacizumab (Bev) or VEGFR Tyrosine Kinase Inhibitor (TKI), is poorly known. Material and Methods U87 cells were treated with Bev or SU1498, a selective VEGFR2 TKI. VEGFR expression was checked with FACS flow cytometry and Quantitative Real-Time PCR. VEGF secretion into the medium was assessed with an ELISA kit. Metabolomic studies on cells were performed using High Resolution Magic Angle Spinning Spectroscopy (HR-MAS). Results U87 cells secreted VEGF and expressed low level of VEGFR2, but no detectable VEGFR1. Exposure to SU1498, but not Bev, significantly impacted cell proliferation and apoptosis. Metabolomic studies with HR MAS showed that Bev had no significant effect on cell metabolism, while SU1498 induced a marked increase in lipids and a decrease in glycerophosphocholine. Accordingly, accumulation of lipid droplets was seen in the cytoplasm of SU1498-treated U87 cells. Conclusion Although both drugs target the VEGF pathway, only SU1498 showed a clear impact on cell proliferation, cell morphology and metabolism. Bevacizumab is thus less likely to modify glioma cells phenotype due to a direct therapeutic pressure on the VEGF autocrine loop. In patients treated with VEGFR TKI, monitoring lipids with magnetic resonance spectroscopic (MRS) might be a valuable marker to assess drug cytotoxicity.

Malignant gliomas: old and new systemic treatment approaches

Abstract Background Malignant (high-grade) gliomas are rapidly progressive brain tumours with very high morbidity and mortality. Until recently, treatment options for patients with malignant gliomas were limited and mainly the same for all subtypes of malignant gliomas. The treatment included surgery and radiotherapy. Chemotherapy used as an adjuvant treatment or at recurrence had a marginal role. Conclusions Nowadays, the treatment of malignant gliomas requires a multidisciplinary approach. The treatment includes surgery, radiotherapy and chemotherapy. The chosen approach is more complex and individually adjusted. By that, the effect on the survival and quality of life is notable higher.

Bevacizumab and irinotecan in recurrent malignant glioma, a single institution experience

Abstract Background. Treatment options of recurrent malignant gliomas are very limited and with a poor survival benefit. The results from phase II trials suggest that the combination of bevacizumab and irinotecan is beneficial. Patients and methods. The medical documentation of 19 adult patients with recurrent malignant gliomas was retrospectively reviewed. All patients received bevacizumab (10 mg/kg) and irinotecan (340 mg/m2 or 125 mg/m2) every two weeks. Patient clinical characteristics, drug toxicities, response rate, progression free survival (PFS) and overall survival (OS) were evaluated. Results. Between August 2008 and November 2011, 19 patients with recurrent malignant gliomas (median age 44.7, male 73.7%, WHO performance status 0-2) were treated with bevacizumab/irinotecan regimen. Thirteen patients had glioblastoma, 5 anaplastic astrocytoma and 1 anaplastic oligoastrocytoma. With exception of one patient, all patients had initially a standard therapy with primary resection followed by postoperative chemoradiotherapy. Radiological response was confirmed after 3 months in 9 patients (1 complete response, 8 partial responses), seven patients had stable disease and three patients have progressed. The median PFS was 6.8 months (95% confidence interval [CI]: 5.3-8.3) with six-month PFS rate 52.6%. The median OS was 7.7 months (95% CI: 6.6-8.7), while six-month and twelve-month survival rates were 68.4% and 31.6%, respectively. There were 16 cases of hematopoietic toxicity grade (G) 1-2. Non-hematopoietic toxicity was present in 14 cases, all G1-2, except for one patient with proteinuria G3. No grade 4 toxicities, no thromboembolic event and no intracranial hemorrhage were observed. Conclusions. In recurrent malignant gliomas combination of bevacizumab and irinotecan might be an active regimen with acceptable toxicity.

Bevacizumab plus chemotherapy in elderly patients with previously untreated metastatic colorectal cancer: single center experience

Abstract Background Metastatic colorectal cancer (mCRC) is mainly a disease of elderly, however, geriatric population is underrepresented in clinical trials. Patient registries represent a tool to assess and follow treatment outcomes in this patient population. The aim of the study was with the help of the patients’ register to determine the safety and efficacy of bevacizumab plus chemotherapy in elderly patients who had previously untreated metastatic colorectal cancer. Patients and methods The registry of patients with mCRC was designed to prospectively evaluate the safety and efficacy of bevacizumab-containing chemotherapy as well as selection of patients in routine clinical practice. Patient baseline clinical characteristics, pre-specified bevacizumab-related adverse events, and efficacy data were collected, evaluated and compared according to the age categories. Results Between January 2008 and December 2010, 210 patients with mCRC (median age 63, male 61.4%) started bevacizumab-containing therapy in the 1st line setting. Majority of the 210 patients received irinotecan-based chemotherapy (68%) as 1st line treatment and 105 patients (50%) received bevacizumab maintenance therapy. Elderly (≥ 70 years) patients presented 22.9% of all patients and they had worse performance status (PS 1/2, 62.4%) than patients in < 70 years group (PS 1/2, 35.8%). Difference in disease control rate was mainly due to inability to assess response in elderly group (64.6% in elderly and 77.8% in < 70 years group, p = 0.066). The median progression free survival was 10.2 (95% CI, 6.7–16.2) and 11.3 (95% CI, 10.2–12.6) months in elderly and < 70 years group, respectively (p = 0.58). The median overall survival was 18.5 (95% CI, 12.4–28.9) and 27.4 (95% CI, 22.7–31.9) months for elderly and < 70 years group, respectively (p = 0.03). Three-year survival rate was 26% and 37.6% in elderly vs. < 70 years group (p = 0.03). Overall rates of bevacizumab-related adverse events were similar in both groups: proteinuria 21/22 %, hypertension 25/19 %, haemorrhage 2/4 % and thromboembolic events 10/6 %, for elderly and < 70 years group, respectively. Conclusions In routine clinical practice, the combination of bevacizumab and chemotherapy is effective and well-tolerated regimen in elderly patients with metastatic colorectal cancer.

The cost of systemic therapy for metastatic colorectal carcinoma in Slovenia: Discrepancy analysis between cost and reimbursement

Abstract Background. The aim of the study was to estimate the direct medical costs of metastatic colorectal cancer (mCRC) treated at the Institute of Oncology Ljubljana and to question the healthcare payment system in Slovenia. Methods. Using an internal patient database, the costs of mCRC patients were estimated in 2009 by examining (1) mCRC direct medical related costs, and (2) the cost difference between payment received by Slovenian health insurance and actual mCRC costs. Costs were analysed in the treatment phase of the disease by assessing the direct medical costs of hospital treatment with systemic therapy together with hospital treatment of side effects, without assessing radiotherapy or surgical treatment. Follow-up costs, indirect medical costs, and nonmedical costs were not included. Results. A total of 209 mCRC patients met all eligibility criteria. The direct medical costs of mCRC hospitalization with systemic therapy in Slovenia for 2009 were estimated as the cost of medications (cost of systemic therapy + cost of drugs for premedication) + labor cost (the cost of carrying out systemic treatment) + cost of lab tests + cost of imaging tests + KRAS testing cost + cost of hospital treatment due to side effects of mCRC treatment, and amounted to €3,914,697. The difference between the cost paid by health insurance and actual costs, estimated as direct medical costs of hospitalization of mCRC patients treated with systemic therapy at the Institute of Oncology Ljubljana in 2009, was €1,900,757.80. Conclusions. The costs paid to the Institute of Oncology Ljubljana by health insurance for treating mCRC with systemic therapy do not match the actual cost of treatment. In fact, the difference between the payment and the actual cost estimated as direct medical costs of hospitalization of mCRC patients treated with systemic therapy at the Institute of Oncology Ljubljana in 2009 was €1,900,757.80. The model Australian Refined Diagnosis Related Groups (AR-DRG) for cost assessment in oncology being currently used is probably one of the reasons for the discrepancy between pay-outs and actual costs. We propose new method for more precise cost assessment in oncology.

Treatment with vemurafenib in patients with metastatic melanoma.

e21028Background: This is an analysis of patients (pts) with metastatic melanoma (mM) designed to evaluate the efficacy and safety of vemurafenib in routine clinical practice. Methods: Baseline characteristics, vemurafenib-related adverse events, and efficacy data were collected from 65 mm pts who were treated with vemurafenib. Results: From April 2013 till December 2015, 129 pts were diagnosed with mm and in 71 pts (55%) tumor tissue was positive for BRAF V600E/K mutation (87% BRAF V600E and 13% BRAF V600K). 65 BRAF-positive pts were treated with vemurafenib therapy (median age 54, males 68%). Vemurafenib was given as first, second or third line treatment to 56 (86%), 6 (9%) and 3 (5%) pts respectively. Distribution by dissemination site was 74% M1c, 14% M1a and 12% M1b. Overall response rate (ORR) was 46%, and disease control rate (DCR) was 73%. Complete response (CR) was reported in 5 pts (9%), partial response (PR) in 20 pts (37%) and stable disease (SD) in 15 pts (27%). Median progression-free surviv...

Isolated Metastases in the Elbow as the First Presentation of MetastaticColorectal Cancer A Case Report and Overview of Literature

Introduction: Colon adenocarcinoma frequently metastasizes to the liver and lung. Distant metastasis to skeletal muscle and subcutaneous tissues arising from colorectal cancer are rarely reported in the literature. Treatment options include radiotherapy, chemotherapy and surgical excision, with no standard treatment. Case presentation: A 64 years old male presented with painful mass in the left elbow (8.5x5.5 cm). The incisional biopsy of the tumor showed poorly differentiated carcinoma, with no clear differentiation between epitheloid sarcoma or low differentiated carcinoma metastasis. PET CT showed pathological metabolic activity in the left elbow and in the right part of the abdomen. Colonoscopy was performed, showing an ulcerated obliterating adenocarcinoma of the sigmoid colon. Hemicolectomy followed. The histological comparison of the both tumors, showed the same characteristics. Molecular analysis showed biomarkers non mutated status. The radiotherapy of the elbow was applied, and he started with combination of doublet chemotherapy and EGFR inhibitor. After three cycles, complete remission was achieved, remaining present. Due to complete regression surgical resection was not necessary. Conclusion: We have reported an extremely rare case of isolated skeletal muscle metastasis as first presentation of metastatic colon adenocarcinoma. PET CT can be helpful to localize the primary site of the metastatic deposits. Immunostaining and pathohistological comparison of the primary carcinoma and the metastasis should be incorporated to reach the final diagnosis whenever possible. Since skeletal muscle metastases are considerably rare and the therapy is not standardized, treatments of these patients should be individualized and must depend on the clinical settings and biomarkers status.