Publications by authors named "Dov Zippel"

Purpose: The aim of this study was to evaluate the rate of axillary node-positive disease in patients with early breast cancer who had a suspicious axillary lymph node on radiation planning computed tomography (CT).

Methods And Materials: A retrospective review was conducted of the medical records of all patients with breast cancer who were referred for axillary ultrasound from the radiation unit to the breast imaging unit at the Meirav Breast Center, Sheba Medical Center, from 2012 to 2022. Ethics approval was obtained.

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Article Synopsis
  • The study examines the link between breast cancer and melanoma, focusing on genetics, surveillance practices, and radiation treatment in patients with both diagnoses (DBM).
  • A cohort of 222 patients treated at Sheba Medical Center from 2007 to 2021 was analyzed, revealing that only 11% had pathogenic variants in BRCA genes, which is lower than in patients with breast cancer alone.
  • The findings indicate that the higher incidence of dual diagnoses may result from improved screening and earlier detection rather than an increased genetic risk for BRCA mutations.
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Aims: This study presents our experience with Intra-Operative Electron Radio-Therapy (IOeRT) using a mobile linear accelerator at the Sheba Medical Center.

Background: Intraoperative radiotherapy is an alternative approach of partial breast irradiation for patients with early breast cancer and low risk for local recurrence who are undergoing breast conservation surgery.

Methods: Patients were selected by a multidisciplinary team according to ASTRO\GEC-ESTRO guidelines for partial breast irradiation.

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Female BRCA1/BRCA2 mutation carriers may elect bilateral risk-reducing mastectomy. There is a paucity of data on yield of imaging surveillance after risk-reducing mastectomy. This retrospective study focused on female BRCA1/BRCA2 mutation carriers who underwent bilateral mastectomy either as primary preventative, or as secondary preventative, after breast cancer diagnosis.

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Background: The rate of risk-reducing bilateral mastectomy (RRBM) among cancer-free Israeli female BRCA1/BRCA2 mutation carriers was reportedly 13% in 2010. Current RRBM rates in Israel and factors seemingly associated with opting for RRBM were reevaluated.

Methods: Israeli female cancer-free BRCA1/BRCA2 mutation carriers, who were followed at the high-risk clinic at Sheba Medical Center between January 2011 and April 2020 were eligible.

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Background: Annual MRI screening is associated with a significant reduction in advanced-stage breast cancer diagnosis in BRCA1/2 mutation carriers. The impact that early detection has on subsequent oncological treatment is less frequently reported. In this study we compared disease stage and therapeutic approaches in BRCA1/2 mutation carriers who developed breast cancer while adhering to the recommended surveillance scheme ("known carriers"), with women who became aware of their BRCA mutation status after breast cancer diagnosis ("latent carriers").

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  • - In the past two decades, the treatment of peritoneal surface malignancies has shifted from a hopeless "carcinomatosis" perspective to one focused on potential cures through advanced procedures like cytoreductive surgery (CRS) and hyperthermic intra-peritoneal chemotherapy (HIPEC).
  • - A systematic review in Israel covered data from 1462 patients treated with CRS/HIPEC across eight surgical groups in six medical centers, highlighting the increasing acceptance and practice of these treatments.
  • - The study aims to establish the Israeli Peritoneal Surface Oncology Group, which will create a shared database and conduct clinical trials to further advance treatment strategies in this complex area of surgical oncology.
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Adoptive cell therapy with tumor infiltrating lymphocytes (TIL) yields 50% response rates in metastatic melanoma and shows promising clinical results in other solid tumors. Autologous TIL cultures are isolated from resected tumor tissue, expanded ex vivo to large numbers and reinfused to the preconditioned patient. In this prospective study, we validate the origin of the tumor biopsy and its effect on T-cell function and clinical response.

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The purpose of this study was to assess pathological complete response and whether it serves a surrogate for survival among patients receiving neo-adjuvant doxorubicin-cyclophosphamide followed by paclitaxel for triple-negative breast cancer with respect to BRCA1 mutation status. From a neo-adjuvant systemic therapy database of 588 breast cancer cases, 80 triple-negative cases who had undergone BRCA genotyping were identified. Logistic regression model was fitted to examine the association between BRCA1 status and pathological complete response.

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Background: BRCA mutation-associated (BRCAmut) breast cancer represents a heterogeneous group displaying certain molecular features. Claudin-low breast cancers (CLBC) overlap with characteristics of BRCAmut tumors; therefore, we have investigated whether these are identical subtypes.

Methods: Using public gene expression data, CLDN, CDH1, 9-cell line claudin-low predictor (9CLCLP) and PAM50 expression was evaluated in BRCAmut and BRCA wild-type (BRCAwt) breast cancer cases focusing on their possible overlap with the CLBC subtype.

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Background: Laparoscopic adjustable gastric banding (LAGB) is an effective bariatric procedure with low morbidity and mortality. Unfortunately, it is fraught with high failure rates in long-term follow-up. Laparoscopic sleeve gastrectomy (LSG) is an emerging procedure, quickly gaining momentum in the arsenal of bariatric practice as a first step toward gastric bypass/biliopancreatic diversion or as a stand-alone operation.

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Purpose: Adoptive cell therapy with autologous tumor-infiltrating lymphocytes (TIL) has shown promising results in metastatic melanoma patients. Although objective response rates of over 50% have been reported, disadvantages of this approach are the labor-intensive TIL production and a very high drop-out rate of enrolled patients, limiting its widespread applicability. Previous studies showed a clear correlation between short TIL culture periods and clinical response.

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Article Synopsis
  • Adoptive cell therapy using tumor-infiltrating lymphocytes (TIL) and interleukin-2 (IL-2) demonstrated significant tumor regression in about half of patients with advanced melanoma post-chemotherapy.
  • Two protocols were tested: "Selected"-TIL, which involved extensive T-cell culture and selection, and "Young"-TIL, which used minimally cultured T cells showing favorable properties without the selection process.
  • Results indicated that Young-TIL showed better patient enrollment and response rates than Selected-TIL, encouraging further development of this treatment approach, although the follow-up for Young-TIL patients was still limited.
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Several studies have shown that extracellular matrix reduces chemotherapeutic drugs-induced apoptosis in small cell lung cancer cells, myelomas and gliomas. We have investigated the protective effect of defined extracellular matrix components and of extracellular matrix from different cell types (fibroblasts, hepatocytes and intestinal epithelial cells) on the toxicity of three types of chemotherapeutic drugs on colon cancer cells. Human colon cancer cell lines LS174T and LiM6 were plated on plastic, on hepatocyte-derived ECM or on stromal ECM and in the presence of the antimetabolite 5-fluorouracil (5-FU).

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