Radiologie interventionnelle et tumeurs des tissus mous : du diagnostic au traitement

Interventional radiology plays an increasing role in the management of soft tissue tumors. For initial diagnosis, precise and safe image-guided biopsies; soft tissue tumor biopsies must be performed in accordance with international guidelines. Then, in a therapeutic phase, interventional radiology, particularly with thermal ablation techniques (radiofrequency, cryoablation), can be proposed for specific indications like salvage treatment of recurrent tumor after surgery and radiotherapy, focal ablation for oligometastatic sarcomas, or treatment of benign locally aggressive tumors such as symptomatic hemangiomas or desmoid tumors. A multidisciplinary approach remains mandatory to achieve optimal patient selection for interventional radiology techniques.     

Factors Associated With Receipt of Partial Nephrectomy or Minimally Invasive Surgery for Patients With Clinical T1a and T1b Renal Masses: Implications for Regionalization of Care

PurposeTo identify factors associated with receipt of partial nephrectomy (PN) and minimally invasive surgery (MIS) in patients with clinical T1 renal cell carcinoma (RCC) using the National Cancer Data Base (NCDB).MethodsWe queried the NCDB from 2010 to 2014 identifying patients treated surgically for cT1a-bN0M0 RCC. Logistic regression was used to examine associations between socioeconomic, clinical, and treatment factors, and receipt of MIS or PN within the T1 patient population.ResultsOur cohort included 69,694 patients (cT1a, n = 44,043; cT1b, n = 25,651). For cT1a tumors, 70% of patients received PN and 65% underwent MIS. For cT1b tumors, 32% of patients received PN and 62% underwent MIS. cT1a and cT1b patients with household income < $62,000, without private insurance, and treated outside academic centers were less likely to receive MIS or PN. cT1a patients traveling > 31 miles were more likely to undergo MIS. For both cT1a/b, the farther a patient traveled for treatment, the more likely a PN was performed.ConclusionData showed an increase in utilization of MIS and PN from 2010 to 2014. However, patients in the lowest socioeconomic groups were less likely to travel and were more likely to receive more invasive treatments. On the basis of these findings, additional research is needed into how regionalization of RCC surgery affects treatment disparities.     

Laparoscopic and Robotic Surgery for Endometrial and Cervical Cancer

Minimally invasive surgery (MIS) has many benefits, in the form of reduced postoperative morbidity, improved recovery and reduced inpatient stay. It is imperative, however, when new techniques are adopted, in the context of treating oncology patients, that the oncological efficacy and safety are established rigorously rather than assumed based on first principles. Here we have attempted to provide a comprehensive review of all the contentious and topical themes surrounding the use of MIS in the treatment of endometrial and cervix cancer following a thorough review of the literature. On the topic of endometrial cancer, we cover the role of laparoscopy in both early and advanced disease, together with the role and unique benefits of robotic surgery. The surgical challenge of patients with a raised body mass index and the frail and elderly are discussed and finally the role of sentinel lymph node assessment. For cervical cancer, the role of MIS for staging and primary treatment is covered, together with the interesting and highly specialist topics of fertility-sparing treatment, ovarian transposition and the live birth rate associated with this. We end with a discussion on the evidence surrounding the role of adjuvant hysterectomy following radical chemoradiation and pelvic exenteration for recurrent cervical cancer. MIS is the standard of care for endometrial cancer. The future of MIS for cervix cancer, however, remains uncertain. Current recommendations, based on the available evidence, are that the open approach should be considered the gold standard for the surgical management of early cervical cancer and that MIS should only be adopted in the context of research. Careful counselling of patients on the current evidence, discussing in detail the risks and benefits to enable them to make an informed choice, remains paramount.     

Groin soft tissue tumors--a challenge for local control and reconstruction: a prospective cohort analysis

BACKGROUND AND OBJECTIVES: Groin soft tissue tumors are associated with high local recurrence rates of 16-48% and postoperative complications in 40-68%. Neoadjuvant chemoradiation and aggressive reconstructive techniques were utilized to improve local control and complication rates in this challenging area. METHODS: Nine patients in this prospective series were treated with neoadjuvant chemoradiation (30 mg IV doxorubicin x 3d followed by 300 cGy/d x 10d) followed by surgery and two patients received radiation (5,000 cGy with tissue spacer) followed by surgery for tumors with a pelvic/retroperitoneal component. Surgery included resection plus reconstruction of the abdominal wall, myocutaneous flaps for large defects, and vascular reconstruction as necessary. RESULTS: The 11 consecutive patients presented with Stage I (30%), II (40%), or III (30%) disease. Four patients (36%) were operated on for possible incarcerated hernia prior to referral and two (18%) presented with recurrent tumors. Pathology included 10 sarcomas and 1 desmoid tumor; tumor grade was low (30%), moderate (40%), or high (30%). Local control (mean follow-up 55 months; minimum follow-up 36 months) and limb salvage rate was 100%. Minor wound complications not requiring re-operation occurred in three patients, lymphedema in two, and there were no postoperative hernias. CONCLUSIONS: Preoperative therapy provides excellent local control of groin soft tissue tumors. Current surgical techniques allow extensive resection with limb salvage, dependable primary wound healing and long-term integrity of the abdominal wall.     

Bioptische Sicherung muskuloskelettaler Tumoren

Musculoskeletal tumors are rare and their symptoms unspecific. A physician should be particularly aware of this. Since malignant primary bone and soft-tissue tumors are treated with a multimodal regimen, the use of a biopsy to confirm the diagnosis is necessary. During biopsies, strict rules must be applied in order to avoid complications which would probably result in more extensive surgery or even amputation of the limb. Technically, incisional biopsies can be differentiated from excisional ones. Incisional biopsies can be divided into needle or core biopsies, or open biopsies. Needle biopsies provide only a very small amount of tissue, often enabling only a cytological diagnosis. An open biopsy is the gold standard and is a safe procedure in terms of diagnosis, but it is more complicated than a needle biopsy. Contamination of the biopsy channel is unavoidable. Thus, during tumor resection, the biopsy channel has to be completely removed together with the tumor. Excisional biopsies are only indicated for small (<5 cm), superficial, soft tissue tumors and/or small bone tumors with slow growth and a low likelihood of malignancy. Strict rules for all kinds of biopsies are described to minimize tumor cell contamination of the surroundings. Surgically, biopsies are simple procedures, provided the rules described are respected, otherwise the resection can be more extensive, probably resulting in a longer duration of surgery, thus increasing the risk of infection and/or the necessity for limb amputation. Even so, complication rates are high. Thus, in cases of unclear diagnoses, incisional biopsies are recommended. The complication rates of biopsies performed in tumor centres are significantly lower than those performed in referral institutions. Patients with musculoskeletal tumors suspected of being malignant should be referred to such a centre prior to the biopsy.     

Role of diagnostic and ablative minimally invasive surgery for pediatric malignancies

BACKGROUND: The use of minimally invasive surgery (MIS) in pediatric cancer is a matter of debate. The diagnostic and ablative roles of MIS were evaluated in a consecutive series of children with malignancies. METHODS: A prospective study, including all patients, who underwent abdominal and thoracic surgery for confirmed or highly suspected pediatric cancer was performed from September, 2000, to December, 2005. An interdisciplinary panel approved the indication for minimally invasive or conventional surgery. RESULTS: At a single institution, 301 operations were performed on 276 children with cancer. A minimally invasive approach was attempted in 90 of these patients (30%) and successfully employed in 69 (77%) of the operations. However, 21 operations (23%) were converted to an open approach. Regarding the abdominal operations attempted laparoscopically, 41 abdominal operations for biopsy or staging purposes were attempted laparoscopically (53%), but 6 were converted. In all, 139 abdominal resections were performed and 24 were attempted laparoscopically. Ten of these (42%) were converted. In 34 thoracic operations requiring biopsy, thoracoscopy was attempted in 14 (41%) and was successful in all but 1 (93%). Fifty-one thoracic tumors were resected and the thoracoscopic approach was attempted in 11 (22%) and successful in 7 (14%). Conversions from a minimally invasive operation to an open procedure occurred mainly due to limited visibility. Three bleeding complications occurred with 1 patient requiring a blood transfusion. In addition, 1 small bowel injury occurred with immediate laparoscopic closure. There were no port site recurrences after a median of 39 months. CONCLUSIONS: MIS is a reliable diagnostic tool for pediatric abdominal and thoracic malignancy. The role of ablative MIS in pediatric cancer remains limited.     

Intraarterial cis-platinum for patients with inoperable skeletal tumors

Twenty-three patients with inoperable skeletal tumors were treated with intraarterial cis-platinum prior to attempted surgery. The antitumor effect of intraarterial cis-platinum was monitored clinically by radiologic imaging techniques, and whenever possible, evaluated histopathologically by examinatin of surgical or biopsy tumor specimens. Objective responses were noted in 12 patients (52%) and included 2 complete, 7 partial and 3 less-than-partial remissions lasting from 14 to 70 weeks. Limb-saving surgery or hemipelvectomy became subsequently feasible in four and one patients respectively. Preoperative intraarterial cis-platinum is a safe procedure which might be used effectively in combination with other, more conventioal postoperative adjuvant chemotherapy against skeletal tumors.     

Minimally invasive gastrectomy for cancer and anastomotic options

In this review article, we explore patient selection criteria for minimally invasive surgery (MIS) gastrectomy, present evidence on the risks and benefits of minimally invasive techniques, describe operative techniques focusing specifically on reconstruction options, and discuss the learning curve associated with these operations.     

胸腹腔镜联合微创手术在新辅助治疗食管癌中的应用分析

目的探讨胸腹腔镜联合微创治疗新辅助放化疗食管癌的安全性及可行性。方法回顾分析2012年1月-2013年12月在我院进行新辅助放化疗的35例食管癌患者的临床资料,比较常规三切口手术（常规组）与胸腹腔镜联合微创手术（微创组）的手术时程、术中出血、淋巴结清扫情况、术后引流及围手术期并发症。结果常规组（18例）和微创组（17例）的术后引流量及淋巴结清扫数量差异无统计学意义（P〉0．05）;手术时程及术中出血量方面两组差异具有统计学意义（P〈0．05）,微创组的手术时程长于开胸组,但术中出血量少于开胸组;两组其他术后观察指标的结果差异无统计学意义（P〉0．05）;术后并发症主要为呼吸功能障碍、吻合口瘘,两组均无术后严重并发症致死。结论胸、腹腔镜联合微创治疗新辅助放化疗食管癌安全可行,值得深入研究并推广应用。     

Neuronavigational guidance in craniofacial approaches for large (para)nasal tumors involving the anterior skull base and upper clival lesions

Objective

Due to the destruction of osseous landmarks of the skull base or paranasal sinuses, the anatomical orientation during surgery of frontobasal or clival tumors with (para)nasal extension is often challenging. In this relation computer assisted surgical (CAS) guidance might be a useful tool. Here, we explored the use of CAS in an interdisciplinary setting.

Methods

The surgical series consists of 13 patients who underwent a lateral rhinotomy combined with a subfrontal craniotomy in case of significant intracranial tumor extension. The procedures were planned and assisted by advanced CAS techniques with image fusion of CT and MRI. Tumors included carcinomas (one case associated with an olfactory groove meningioma), esthesioneuroblastoma, chordoma, chondrosarcoma and ganglioglioma.

Results

The application of CAS in the combined approaches was both safe and reliable for delineation of tumors and identification of vital structures hidden or encased by the tumors. There was no perioperative 30-day mortality; however two patients died 5 weeks and 5 months after craniofacial tumor resection due to worsening medical conditions. The most common perioperative morbidity was postoperative wound complication in two cases. Tumors were either removed completely, or subtotal resection was achieved allowing targeted postoperative radiotherapy.

Conclusion

Craniofacial approaches with intraoperative neuronavigational guidance in a multidisciplinary setting allow safe resection of large tumors of the upper clivus and the paranasal sinuses involving the anterior skull base. Complex skull base surgery with the involvement of bony structures appears to be an ideal field for advanced navigation techniques given the lack of intraoperative shift of relevant structures.     

The value of mammography after limited breast surgery and before definitive radiation therapy.

One hundred twenty consecutive patients who had breast-conserving surgery for cancer and were referred for definitive radiation therapy (RT) had a mammogram performed before starting RT. This was done to determine the presence of residual neoplasm or other abnormalities that may alter or delay the planned RT and are undetected by other means. It also was performed to provide a baseline for the diagnosis of postoperative changes and recurrence of disease on follow-up studies. In six (5%) patients, calcifications or masses were found that proved to be residual tumors. This led to reexcision in two, mastectomies in two, and a higher radiation booster dose to the tumor bed in two. Eight (6.6%) patients had postoperative hematomas larger than 4 cm in diameter, which delayed the start of RT by 2 to 3 weeks. In 39 (32%) patients, the pre-RT mammogram provided information considered to be helpful for the interpretation of post-RT mammograms. Such information may lead to a decrease in the number of diagnostic biopsies based on indeterminate mammographic findings. Therefore, a routine mammogram is recommended before RT is started.     

A structured strategy to combine education for advanced MIS training in surgical oncology training programs

Changing realities in surgery and surgical technique have heightened the need for agile adaptation in training programs. Current guidelines reflect the growing acceptance and adoption of the use of minimally invasive surgery (MIS) in oncology. North American general surgery residents are often not adequately skilled in advanced laparoscopic surgery skills at the completion of their residency. Presently, advanced laparoscopic surgery training during surgical oncology fellowship training occurs on an ad-hoc basis in many surgical oncology programs.We present a rational and template for a structured training in advanced minimally invasive surgical techniques during surgical oncology fellowship training. The structure of the program seeks to incorporate evidence-based strategies in MIS training from a comprehensive review of the literature, while maintaining essential elements of rigorous surgical oncology training. Fellows in this stream will train and certify in the Fundamentals of Laparoscopic Surgery (FLS) course. Fellows will participate in the didactic oncology seminar series continuously throughout the 27 months training period. Fellows will complete one full year of dedicated MIS training, followed by 15 months of surgical oncology training. Minimal standards for case volume will be expected for MIS cases and training will be tailored to meet the career goals of the fellows.We propose that a formalized MIS-Surgical Oncology Fellowship will allow trainees to benefit from an effective training curriculum and furthermore, that will allow for graduates to lead in a cancer surgery milieu increasingly focused on minimally invasive approaches.     

侵袭性在垂体腺瘤术后残留再生长与复发中的评价及临床现状

垂体腺瘤是颅内肿瘤中较常见的一种,约占颅内肿瘤的10%。垂体腺瘤虽然为良性肿瘤,但由于肿瘤侵袭性生长特性、设备条件和手术者技术有限等因素影响,使得肿瘤镜下全切和复发问题仍然较突出,复发垂体腺瘤比例逐年升高,治疗难度也随之增大。本文旨在总结本中心的侵袭性或复发性垂体腺瘤的病例资料,对复发性垂体腺瘤的诊治,包括再次经蝶手术适应证、手术技巧以及术后并发症的预防和处理等进行述评,为临床医师提供参考。     

Minimally invasive surgery and childhood cancer

Over the last 2 decades, minimally invasive surgery (MIS) has become a significant tool for the diagnosis and treatment of malignant disease in adults. Despite initial reports of port-site metastases and peritoneal spread following laparoscopic resection of colorectal cancer in the 1990s, MIS is now commonly used for many applications in adult surgical oncology, including biopsy and resection of malignant disease in the chest and abdominal cavities, mediastinal and retroperitoneal lymph node dissection, staging of abdominal, pelvic and thoracic malignancies, and management of therapeutic complications. The use of MIS techniques in children is growing with the availability of smaller instruments and equipment more suitable to the pediatric patient. Herein, we review the role of MIS in the diagnosis, staging and treatment of malignant disease in children. We will also evaluate MIS as it applies to the palliation of disease and the management of treatment complications in childhood cancer.     

Transoral laser resection for head and neck cancers

Transoral laser surgery has become a therapeutic option and even a standard for certain tumors of the larynx and pharynx. The postoperative course after this type of minimally invasive surgery has been shown to be significantly simpler, with less need for temporary tracheotomy and enteral feeding. For selected tumors amenable to this approach, the oncologic results have been shown to be equivalent to those obtained by classic external approaches. Transoral laser surgery requires specific equipment and training of the surgeon, the anaesthesiologist, the operating room team and the pathologist. Despite this specificity, but because of the simplified postoperative course, transoral laser surgery has already supplanted several external approaches and will in the future probably replace other techniques, as experience with the technique increases and the indications evolve.     

Is breast conservative surgery a reasonable option in multifocal or multicentric tumors?

The incidence of multifocal (MF) and multicentric (MC) carcinomas varies widely among clinical studies, depending on definitions and methods for pathological sampling. Magnetic resonance imaging is increasingly used because it can help identify additional and conventionally occult tumors with high sensitivity. However, false positive lesions might incorrectly influence treatment decisions. Therefore, preoperative biopsies must be performed to avoid unnecessary surgery. Most studies have shown higher lymph node involvement rates in MF/MC tumors than in unifocal tumors. However, the rate of local recurrences is usually low after breast conservative treatment (BCT) of MC/MF tumors. It has been suggested that BCT is a reasonable option for MC/MF tumors in women aged 50-69 years, with small tumors and absence of extensive ductal carcinoma in situ. A meta-analysis showed an apparent decreased overall survival in MC/MF tumors but data are controversial. Surgery should achieve both acceptable cosmetic results and negative margins, which requires thorough preoperative radiological workup and localization of lesions. Boost radiotherapy techniques must be evaluated since double boosts might result in increased toxicity, namely fibrosis. In conclusion, BCT is feasible in selected patients with MC/MF but the choice of surgery must be discussed in a multidisciplinary team comprising at least radiologists, surgeons and radiotherapists.     

功能成像技术对局部晚期直肠癌新辅助治疗预测与评估价值

对于局部晚期直肠癌,新辅助放化疗后行手术切除,再行术后辅助化疗,已发展为标准治疗模式。新辅助治疗可使肿瘤病灶发生不同程度的退缩,部分患者术后病理证实达到完全缓解,有助于增加直肠癌患者根治性手术概率,并降低复发率,改善患者的远期预后。近年来,新辅助治疗疗效的预测和评估,成为临床医生关注的焦点。在影像学方面,常规的形态成像技术,不能够准确反映新辅助放化疗后肿瘤治疗效果,而DWI-MRI、DCE-MRI、PET-CT等功能成像技术不仅能够反映肿瘤退缩程度,还可以反映治疗前后肿瘤功能代谢方面的变化,因而更为准确。现对直肠癌新辅助放化疗影像学疗效评价方法的应用现状进行综述。     

Highly purified müllerian inhibiting substance inhibits human ovarian cancer in vivo.

PURPOSE: Müllerian inhibiting substance (MIS) causes Müllerianduct regression in mammalian, avian, and reptilian embryos; MIS also inhibits growth in vitro of Müllerian-derived cell lines and primary cells from human ovarian carcinomas. We hypothesize that highly purified MIS delivered parenterally inhibits ovarian cancer in vivo. EXPERIMENTAL DESIGN: To test the efficacy of highly purified MIS against ovarian cancer cell lines in vivo, we treated immunosuppressed mice with MIS after implanting OVCAR 8 or IGROV 1 human ovarian cancer cells beneath the renal capsules and measured tumor volume over time. Animals were treated with daily injections of 10 micro g of purified exogenous recombinant human MIS or by endogenous MIS secreted from cells growing on biodegradable mesh. RESULTS: The average graft size ratio (change in size compared with starting size) of the OVCAR 8 tumor implants was larger in the control animals than in animals treated for 2 weeks (P < 0.019) or 3 weeks (P < 0.001) with parenteral MIS, or after treating with MIS produced from transfected cells, which impregnated the biodegradable mesh (P = 0.02). The average graft size ratio of the IGROV 1 tumors was also larger in the control animals than in those treated with injected MIS (P = 0.0174). CONCLUSIONS: Highly purified recombinant human MIS, delivered parenterally, or MIS produced endogenously causes inhibition of human ovarian cancer cell lines in vivo, providing convincing preclinical evidence to support the use of MIS as a parenteral agent for the treatment of ovarian cancer.     

Recombinant human mullerian inhibiting substance inhibits human ocular melanoma cell lines in vitro and in vivo.

Since Mullerian Inhibiting Substance (MIS) causes regression of the Mullerian duct, the anlagen of the uterus, vagina, and fallopian tube, we expected and have previously observed that purified recombinant human MIS causes regression of gynecological tumors. However, recent experiments indicating that neural crest derivatives might be responsive to MIS prompted study of a group of human ocular melanoma cell lines in 4 in vitro inhibition assays, and a subrenal capsule assay in vivo. Ocular melanoma cell lines that grew well in a respective assay were studied with MIS to determine whether this biological modifier could inhibit growth. Three human ocular melanomas, OM431 (P less than 0.01), OM467 (P less than 0.02), and OM482 (P less than 0.03), were growth-inhibited by highly purified human recombinant MIS in soft agarose. A dose-dependent tumor inhibition was noted when OM431 cells were incubated with MIS in a liquid colony inhibition assay (P less than 0.05). In addition, OM467 was inhibited (P less than 0.05) by MIS in a multicellular tumor spheroid assay. Cell cycle analysis indicated that OM431 cells were inhibited in monolayer by MIS while in G1. At 100-fold lower serum concentrations than required in the media of in vitro assays, MIS delivered via i.p. osmotic pumps inhibited (P less than 0.05) in vivo the growth of OM431 implanted beneath the renal capsule of nude and CD-1 irradiated mice when compared to mice given implants of pumps containing no MIS. The responsiveness of ocular melanoma to MIS broadens the spectrum of tumors that might be treated with MIS and suggests further investigation of other neural crest tumors.     

Long-term oncological safety of minimally invasive surgery in high-risk endometrial cancer

BackgroundSeveral studies showed that women with low-risk endometrial cancers staged by minimally invasive surgery (MIS) experience fewer postoperative complications compared to those staged by laparotomy with similar disease-free survival (DFS) and overall survival (OS). However, high-risk patients were poorly represented. In this study, we compared DFS and OS in high-risk endometrial cancer patients who underwent surgical staging via MIS versus laparotomy.MethodsUsing a multicentric database, we compared DFS and OS between 114 patients with high-risk histology who underwent surgical staging via MIS and 114 patients who underwent laparotomy. Patients were matched for age, tumour type, FIGO stage and management criteria.ResultsAmong the 114 patients who underwent MIS, 93 underwent laparoscopy and 21 robotic surgery. Groups were comparable for stage, body mass index, histology and adjuvant therapies. However, patients in the MIS group underwent paraaortic lymphadenectomy less frequently (13% versus 29%; p = 0.01), had less lymph nodes removed (19.0 versus 28.6; p < 0.01) and had lower mean tumour size (30 versus 40 mm; p < 0.01). With a median follow-up time of 49 months, DFS and OS were not significantly different between the surgical cohorts. In multivariable analysis, both higher stage (hazard ratio [HR] = 2.2) and histology (HR = 4.9) were associated with DFS in contrast to surgical procedure (HR = 0.9).ConclusionsBeyond the benefit of MIS on immediate surgical outcome, our results show that fear for a poor long-term outcome should not be the reason to refrain from MIS in patients with high-risk endometrial cancer.