X-ref For other Roundups in this issue that cross-reference with Research see: Shoulder & Elbow Roundup 6; Trauma Roundup 8.
Surgical margins and sarcomas
There is little in the way of controlled data on surgical excision margins and outcomes in sarcomas, however, it remains potentially one of the most important determinants of outcomes. Researchers in Corvallis, Oregon (USA) add some important information in their study of excision of feline injection site sarcomas.1 The authors studied the effect of processing of widely excised injection site sarcomas from client-owned cats. The study examined the excision margins in all four directions during the processing of the samples from five cats. In what is quite an interesting study, the authors identified significant decreases in surgical margin length immediately following excision (prior to formalin fixation). Formalin fixation, trimming, and mounting on slides did not result in additional significant changes in length. Subgross evaluation of tumour-free margins from on-slide grossly normal surgical margins to histologic tumour-free margin overestimates the actual (histologic) tumour-free margins. The authors established that the change in grossly normal surgical margins was a decrease of 33% following processing, of which 29% occurred after excision.
Fluoroscopic radiation exposure to the breast
In a concerning study from San Francisco, California (USA), the authors have noted that there was an increased incidence of breast cancer in female orthopaedic surgeons compared with the wider population.2 There are a few explanations as to why this might be. The research team used an anthropomorphic torso phantom, simulating the female surgeon, placed adjacent to a standard operating table. The radiation exposure was recorded using dosimeters placed over the upper outer quadrant (UOQ) and lower inner quadrant (LIQ) of the breast, bilaterally. Scatter radiation dose-equivalent rates were measured during continuous fluoroscopy to a pelvic phantom. There was a higher radiation dose to the upper outer quadrant versus …