Service of Radiation Oncology

Arroyo de la Luz, Spain

Service of Radiation Oncology

Arroyo de la Luz, Spain
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Calvo F.A.,Hospital General Universitario | Calvo F.A.,Complutense University of Madrid | Sole C.V.,Institute Gustave Roussy Cancer Campus | Rivera S.,Institute Gustave Roussy Cancer Campus | And 9 more authors.
Clinical and Translational Oncology | Year: 2014

Age is an important feature at the time of early breast cancer diagnosis. Radiotherapy is a mandatory component of treatment for breast-conserving strategies in early disease stages. Breast radiotherapy has rapidly evolved in the last 20 years. A tendency to less treatment volume (partial-breast irradiation) and less treatment time (hypofractionation) is consolidated in modern radiation oncology practice. Age and risk for local recurrence guide the decision-making process to electro-optimal treatment. Radiotherapy technological versatility offers multiple options for individualized (risk-age adapted) recommendations. © 2014 Federación de Sociedades Españolas de Oncología (FESEO).

Thariat J.,University of Nice Sophia Antipolis | Thariat J.,French National Center for Scientific Research | Thariat J.,Center Antoine Lacassagne | Etienne-Grimaldi M.-C.,Center Antoine Lacassagne | And 18 more authors.
Clinical Cancer Research | Year: 2012

Purpose: Epidermal growth factor receptor (EGFR) overexpression is associated with poor prognosis in head and neck squamous cell carcinoma (HNSCC). Despite intensive biomarker studies, a consensual method for assessing EGFR protein expression is still lacking. Here we set out to compare three EGFR detection methods in tumor specimens from HNSCC patients. Experimental Design: Tumors were prospectively excised from a series of 79 high-risk HNSCC patients enrolled in a GORTEC-sponsored clinical trial. EGFR expression was determined using a ligand-binding assay on membranes, Western blotting (WB) on membranes and total homogenates, and immunohistochemistry (IHC) on tissue microarrays. In addition, phosphorylated EGFR (pEGFR) was measured by WB on membranes. Results: Distributions and ranges of tumor EGFR expression were method dependent. Moderate positive correlations (Spearman coefficient r ≈ 0.50) were observed between EGFR expression measured by the binding assay and WB or IHC. pEGFR levels positively and significantly correlated with total EGFR expression measured by WB or ligand binding, but not by IHC. The highest correlation (r = 0.85) was observed between EGFR and pEGFR levels, both measured by WB on membranes. Interestingly, the fraction of phosphorylated receptor (pEGFR/EGFR both measured by WB on membranes) significantly declined with increasing tumor EGFR expression, by all assessment methods used. Conclusion: This study shows significant correlations between EGFR detection methods. The observed relationships between EGFR and pEGFR indicate that high-throughput pEGFR/EGFR analyses merit further investigations and consideration for routine use in patient samples. ©2012 AACR.

Calvo F.A.,Hospital General Universitario Gregorio Maranon | Calvo F.A.,Complutense University of Madrid | Sole C.V.,Hospital General Universitario Gregorio Maranon | Sole C.V.,Complutense University of Madrid | And 10 more authors.
Clinical and Translational Oncology | Year: 2013

The reality of intraoperative radiation therapy (IORT) practice is consistent with an efficient and highly precise radiation therapy technique to safely boost areas at risk for local recurrence. Long-term clinical experience has shown that IORT-containing multi-modality regimens appear to improve local disease control, if not survival in many diseases. Research with IORT is a multidisciplinary scenario that covers knowledge from radiation beam adapted development to advance molecular biology for bio-predictability of outcome. The technical parameters employed in IORT procedures are important information to be recorded for quality assurance and clinical results analysis. In addition, specific treatment planning systems for IORT procedures are available, to help in the treatment decision-making process. A systematic revision of opportunities for research and innovation in IORT is reported including radiation beam modulation, delivery, dosimetry and planning; infrastructure and treatment factors; experimental and clinical radiobiology; clinical trials, innovation and translational research development. © 2013 Federación de Sociedades Españolas de Oncología (FESEO).

PubMed | Service of Medical Physics, I.R.C.C.S. Ospedale San Raffaele, Vita-Salute San Raffaele University, Service of Neuro anesthesia and Service of Radiation Oncology
Type: | Journal: World neurosurgery | Year: 2016

Complete vestibular schwannomas (VS) removal is not always achievable without any risk of disabling postoperative complications, especially in terms of facial nerve function. Moreover, even after gross total removal a relevant rate of recurrence has been reported. The aim of this study is to validate Gamma Knife radiosurgery (GKRS) as an effective strategy to treat tumors regrowth after previous surgery.Ninety patients treated with GKRS for VS after previous microsurgery were included in the present study. GKRS was performed at a median of 31 months (range 4-174 months) postoperatively. Mean tumor volume was 3.35 cmAt a mean follow-up of 77.2 months, tumor control was achieved in 90% of patients: 2 patients underwent repeated GKRS, while 7 patients underwent further microsurgery. Tumor shrinkage at last FU was recorded in 80.3% of cases. Complications rate was very low; many of them consisted in a transient worsening of pre-existing symptoms. The overall incidence of persisting facial nerve deficit and trigeminal nerve impairment was, in both cases, 3.3%. Two out of 5 patients (40%) preserved functional hearing at last follow-up. One patient (1.1%) underwent ventriculoperitoneal shunting 12 months after GKRS.GKRS is a safe and effective treatment for growing residual and recurrent VSs, with a tumor control obtained in 90% of cases and a very low morbidity rate. Moreover, the possibility of treating patients with major medical comorbidities constitute a significant advantage over repeated surgery.

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