Yair Gortzak

Yair Gortzak
Tel Aviv Sourasky Medical Center | TASMC · Department of Orthopedic Oncology

MD, MSc

About

34
Publications
2,411
Reads
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431
Citations
Introduction
Skills and Expertise
Additional affiliations
January 2014 - present
Tel Aviv Sourasky Medical Center
Position
  • Head Pediatric Orthopedic Oncology Service
September 2009 - August 2020
Tel Aviv Sourasky Medical Center
Position
  • Staff Surgeon
Education
October 1995 - July 2001
Ben-Gurion University of the Negev
Field of study
  • Physiology
October 1991 - July 1998

Publications

Publications (34)
Article
Background The surgical treatment for osteoid osteoma (OO) in the foot and ankle is challenging. It is difficult to locate the lesion and the anatomy is crowded by sensitive structures. The purpose of this study was to describe the outcomes of navigated mini open-intralesional curettage (NMIC) or navigated minimally invasive radiofrequency ablation...
Article
BACKGROUND The main goal of treatment of soft tissue sarcomas is achieving wide negative margins to improve local control and prevent recurrence. The role of radiation therapy (RT) is well-established in sarcomas of the extremities, however its role in unplanned “Oops” operations is inconclusive. We report on the effect of RT after an unplanned sur...
Article
Background Primary bone sarcomas are associated with critically sized bone defects and require complete resection with negative margins. Recent advancements in health care have pioneered novel approaches such as the implementation of 3D surgical technologies. This study presents oncological and functional outcomes following tumor resections of long...
Article
Background: Three-dimensional (3D) virtual surgical planning technology has advanced applications in the correction of deformities of long bones by enabling the production of 3D stereolithographic models, patient-specific instruments and surgical-guiding templates. Herein, we describe the implementation of this technology in young patients who req...
Article
Background and Objective Extra abdominal desmoid tumors are rare, highly aggressive, and invasive benign soft tissue tumors. Current treatment modalities show high levels of recurrence and comorbidities. Cryo-surgery as an alternative was subsequently investigated. Methods In this retrospective, single center study 11 patients showing symptomatic...
Article
Background Infantile myofibromatosis (IM) is a rare benign fibrous tumor with diverse clinical presentations and treatments, such as watchful waiting, surgical excision, and low‐dose chemotherapy. Procedure Clinical presentation and tailored treatment of five infants with solitary and generalized IM are described, together with a review of the lit...
Article
Background Most benign active and latent lesions of proximal femur do not predispose a patient to a pathologic fracture. Nonetheless, there is a tendency to perform internal fixation due to the lack of accurate clinical tools that may reliably confirm low risk of pathologic fracture. As many as 30% of these surgeries may be unnecessary. A patient-s...
Article
Background and Objectives Expandable distal femur prostheses have become more popular over the last decades, but scientific data is limited. Methods A retrospective study was performed, including cases treated between 1986 and 2019 in 15 European referral centers for bone sarcomas. Results A total of 299 cases were included. Average follow‐up was...
Article
Aims: Accurate estimations of the risk of fracture due to metastatic bone disease in the femur is essential in order to avoid both under-treatment and over-treatment of patients with an impending pathological fracture. The purpose of the current retrospective in vivo study was to use CT-based finite element analyses (CTFEA) to identify a clear qua...
Article
Full-text available
Take home message  A retrospective in-vivo study on 41 patients with femoral MBD shows that CTFEA predicts the risk of an impending fracture by far better compared to Mirels' score (sensitivity of 100% and specificity of 67%).  CTFEA predicts well the fracture location.  The CTFEA is quick and automated and may be easily incorporated into CT sca...
Article
Full-text available
Background: Osteoid osteomas are benign bone neoplasms that may cause severe pain and limit function. They are commonly treated by radiofrequency ablation (RFA) through a needle inserted into the nidus of the lesion under CT guidance, which is associated with exposure of young patients to relatively high dose of radiation. The objective of this st...
Article
Aims: Intra-articular 90Yttrium (90Y) is an adjunct to surgical treatment by synovectomy for patients with diffuse-type tenosynovial giant-cell tumour (dtTGCT) of the knee, with variable success rates. Clinical information is, however, sparse and its value remains unclear. We investigated the long-term outcome of patients who underwent synovectomy...
Article
Full-text available
Physician recommendation for prophylactic surgical fixation of a femur with metastatic bone disease (MBD) is usually based on Mirels' criteria and clinical experience, both of which suffer from poor specificity. This may result in a significant number of these health compromised patients undergoing unnecessary surgery. CT-based finite element analy...
Article
Excision of the proximal femur for tumour with prosthetic reconstruction using a bipolar femoral head places a considerable load on the unreplaced acetabulum. We retrospectively reviewed the changes which occur around the affected hip joint by evaluating the post-operative radiographs of 65 consecutive patients who underwent proximal prosthetic art...
Article
Full-text available
The article describes a unique clinical case of multifocal synchronous osteosarcoma patient 10 years old with the defeat of the right femur and humerus identified in a clinic in Israel in 2014. The patient was conducted a combined treatment including arthroplasty. At the time of this writing, the patient is alive without evidence of disease manifes...
Article
Neoadjuvant chemotherapy for osteosarcoma is the standard of care, but there is still confusion regarding the best chemotherapy regimen and the optimal intensity. This retrospective study intends to evaluate whether there is a clear correlation between the chemotherapy dose intensity (DI) and the percentage of tumor necrosis, the risk of tumor recu...
Article
Reconstruction of the posterior neck is one of the rarer procedures performed by plastic surgeons; we used free flaps for the closure of defects in this area in six cases over the past 4 years. Six patients were located requiring posterior neck reconstruction between the years 2007 and 2013. Five of these patients required reconstruction due to onc...
Article
Adamantinoma is a rare primary bone neoplasm with epithelial differentiation that is frequently associated with a concomitant fibrous component. Clinical, cytogenetic and histomorphologic overlap has previously been described with osteofibrous dysplasia, thereby suggesting a relationship between these two lesions. We performed a retrospective revie...
Article
Full-text available
The diagnostic value of the vacuum phenomenon between the femoral head and the acetabulum, and time frame of its occurrence after application of traction is an important clinical question. The resulting arthrogram may outline the shape, location, and extent of cartilage lesions prior to arthroscopy of the hip joint. The presence, duration, and dia...
Article
Various chemicals are commonly used as adjuvant treatment to surgery for giant-cell tumour (GCT) of bone. The comparative effect of these solutions on the cells of GCT is not known. In this study we evaluated the cytotoxic effect of sterile water, 95% ethanol, 5% phenol, 3% hydrogen peroxide (H 2 O 2 ) and 50% zinc chloride (ZnCI 2 ) on GCT monolay...
Article
The objective of the current study was to formulate a scoring system to enable decision making for prophylactic stabilization of the femur after surgical resection of a soft tissue sarcoma (STS) of the thigh. A logistic regression model was developed using patient variables collected from a prospectively collected database. The study group included...
Article
Advances in adjuvant treatment protocols and improvements in imaging techniques have helped improve the limb-salvage rate for extremity soft tissue sarcomas to approximately 95%. Moreover, improvements in operative techniques have enabled successful limb-salvage surgery to be performed even in the face of vascular invasion or encasement by tumor. E...
Article
Chronic wounds of the lower limbs are a cause of severe morbidity in diabetic patients. Low oxygen tension around the wound is one of several critical factors, which mutually enhance the progression of a chronic ulcer. Hyperbaric oxygen therapy (HBO) is believed to improve wound healing by enhancing oxygen tension around the wound. While convention...
Article
The authors present an original fixation technique for pediatric olecranon fractures that avoids reoperation to remove hardware as compared with the standard fixation technique with Kirschner wires and tension band wiring as advocated by the AO technique. The authors' technique uses two percutaneously placed Kirschner wires to fixate displaced tran...
Article
Congenital insensitivity to pain with anhidrosis (CIPA) is a rare autosomal recessive genetic disease, which is characterized by recurrent episodes of fever, anhidrosis, self mutilation, absence of reaction to noxious stimuli, prolonged healing times and mental retardation. The absence of pain sensation combined with mental retardation predisposes...
Article
Hip arthroscopy was first described by Burman in 1931. During the 1980's this procedure was performed by a limited group of orthopedic surgeons. Implementation and development of the surgical procedure received most attention during those years, together with the formulation of specific indications to perform hip arthroscopy. In contrast to other l...
Article
Transverse vaginal incision during cesarean section, also known as anterior vaginotomy, is a recognized entity, mostly made unintentionally. At our institution, four patients underwent a transverse vaginal incision during cesarean section over an eight-year period. In three of them, excessive bleeding required blood transfusion. In one case, only h...
Article
Gallstone has rarely been described as a cause of gastrointestinal obstruction. However, the relative incidence of gallstone ileus increases significantly with age. The gastric outlet is very seldom the location of obstruction by a gallstone. The diagnosis of this condition is not difficult. Nevertheless, if treatment is delayed, high morbidity and...
Article
Gallstone has rarely been described as a cause of gastrointestinal obstruction. However, the relative incidence of gallstone ileus increases significantly with age. The gastric outlet is very seldom the location of obstruction by a gallstone. The diagnosis of this condition is not difficult. Nevertheless, if treatment is delayed, high morbidity and...

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