Translating cancer genomes sequencing revolution into surgical oncology practice

BACKGROUND

Ten years after the first complete human genome sequencing, next-generation sequencing (NGS) technology has revolutionized genomics and biomedical research. Here we discuss potential emerging and future applications of NGS platforms and how cancer genome advances may change current surgical oncology practice.

MATERIALS AND METHODS

Publications in PubMed with partial or complete human and cancer genome sequencing over the last decade have been retrieved and analyzed. Recently launched international large-scale consortiums for systematic study of causal (driver) mutations underlying common complex diseases such as cancer and more recent opinion articles by leading scientists have been considered to predict the prospects of integration genomics data into surgical oncology.

RESULTS

Two dozen complete human genome sequences, and three full-genome sequencing in three cancer patients have recently been published. These studies and other cancer genome systematic studies evaluating genomic rearrangements and copy-number changes consistently reveal that cancer initiation and metastasis are much more complex than we thought. This high complexity and widespread variability of cancer genes, mutations, and deregulated signaling pathways among patients with the same cancer type, tumor stage, and clinicopathologic features explains the limited effectiveness of currently used biologically targeted agents.

CONCLUSIONS

Yet the impact of genomics explosion in surgical oncology is little. Nevertheless, "big" biology consortiums such as the International Cancer Genome Project and other systematic studies in the areas of genetics, genomics, and epigenetics are now providing in-depth understanding of cancer, and shape new more rational ways towards novel therapeutics for improving oncologic outcomes of millions of patients worldwide. At the beginning of the second post-genomic decade, an explosion in genomic technology has revolutionized biomedical sciences. The ability of latest DNA sequencing technology to identify, in an unprecedented level, causal mutations driving cancer initiation and metastasis raises significant expectations for improving oncologic outcomes. Which are the challenges and perspectives to translate this genomic revolution into a surgical oncology-changing era?

Vascular pedicle avulsion in free flap breast reconstruction: a case of diep flap salvage following early avulsion of venous anastomosis and literature review

Free flap vascular pedicle avulsion represents an extremely rare complication in reconstructive microsurgery. Very few cases have been reported in the literature, most of them identified in free flap breast reconstruction. As a result, little data is currently available on the etiology and treatment of this rare complication. Herein, we report a unique case of early venous anastomosis avulsion following free DIEP flap transfer for delayed breast reconstruction. Venous outflow was successfully restored with the use of an interposition vein graft, and the flap survived completely. In addition, the relevant literature is reviewed; and the possible causes, preventive strategies, and management options are analyzed.

Tissue expansion and latissimus dorsi transfer for arm-thorax synechia reconstruction

Inadequate treatment of severe burn injury often results in scar contractures with subsequent functional impairment and cosmetic deformities depending on the body area involved. Arm-thorax synechia is a rare but devastating complication of burns. The authors report a case of a 17-year-old boy with subtotal arm-thorax synechia, secondary to burn contracture. Reconstruction was accomplished, in two stages, with the use of tissue expanders and a latissimus dorsi muscle flap. The postoperative course was uneventful in both stages, with complete survival of both the expanded skin and the muscle flap. Early initiation of intensive rehabilitation resulted in excellent functional outcome, while significant aesthetic improvement was also ensured. In conclusion, the combined use of tissue expansion and latissimus dorsi transfer may prove to be a very good option in the treatment of complex postburn axillary contractures. The main advantages of the suggested method are the best quality of skin provided by tissue expansion and the safe coverage of any vital structures exposed with the use of the muscle flap.

Omitting Axilla Lymphadenectomy Even by Positive Sentinel Lymph Node: A Change in Breast Cancer Treatment Practice

Evaluation of: Giuliano AE, Hunt KK, Ballman KV et al. Axillary dissection vs no axillary dissection in women with invasive breast cancer and sentinel node metastasis: a randomized clinical trial. JAMA 305, 569–575 (2011). Sentinel lymph node biopsy (SLNB) has been a reliable technique to accurately predict the axilla node status in women with breast cancer with clinically negative lymph nodes. Based on predictive accuracy evidence from large-scale clinical trials, SLNB has become the current standard of care in breast cancer, preventing unnecessary axilla lymph node dissection and its related adverse events in patients who test negative with SLNB. Now a Phase III randomized trial provides evidence that avoiding axilla lymphadenectomy in patients with positive SLNB does not increase locoregional recurrence or mortality. In this article the benefits, risks and selection criteria to safely prevent axilla lymphadenectomy even by positive SLNB are discussed. Moreover, limitations of this practice-changing trial are described with emphasis on caution in patient selection.