A multicentre validation of Metasin: a molecular assay for the intraoperative assessment of sentinel lymph nodes from breast cancer patients.

AIMS: Treatment strategies for breast cancer continue to evolve. No uniformity exists in the UK for the management of node-positive breast cancer patients. Most centres continue to use conventional histopathology of sampled sentinel lymph nodes (SLNs), which requires delayed axillary clearance in up to 25% of patients. Some use touch imprint cytology or frozen section for intraoperative testing, although both have inherent sensitivity issues. An intraoperative molecular diagnostic approach helps to overcome some of these limitations. The aim of this study was to assess the clinical effectiveness of Metasin, a molecular method for the intraoperative evaluation of SLNs. METHODS AND RESULTS: RNA from 3296 lymph nodes from 1836 patients undergoing SLN assessment was analysed with Metasin. Alternate slices of tissue were examined in parallel by histology. Cases deemed to be discordant were analysed by protein gel electrophoresis. There was concordance between Metasin and histology in 94.1% of cases, with a sensitivity of 92% [95% confidence interval (CI) 88-94%] and a specificity of 97% (95% CI 95-97%). Positive and negative predictive values were 88% and 98%, respectively. Over half of the discordant cases (4.4%) were ascribed to tissue allocation bias (TAB). CONCLUSIONS: Clinical validation of the Metasin assay suggests that it is sufficiently sensitive and specific to make it fit for purpose in the intraoperative setting.

General Anaesthesia and Emergency Surgery in Heart Transplant Recipient.

The number of patients who undergo heart transplant is increasing. Due to surgical emergencies, many of those may require general anesthesia in hospitals where subspecialized anesthetists may not be available. We present a case of a male patient who had heart transplant and required general anesthesia for emergency appendicectomy. Physiology of the heart after transplant, preoperative considerations, and postoperative monitoring has been discussed in our report.

Removing symptomatic gallstones at their first emergency presentation.

INTRODUCTION: Early operations for symptomatic gallstones are gaining favour as the complication rate is thought to be lower and it reduces the overall morbidity. This study was performed to clarify how frequently early operations were being performed and what benefits resulted. PATIENTS AND METHODS: Case notes of 171 patients who underwent laparoscopic cholecystectomy at Princess Alexandra Hospital Harlow were retrospectively reviewed. They were grouped according to their initial diagnosis (cholelithiasis, acute cholecystitis) and the delay to surgery (early, interval). Forty-one cases were excluded as they either had incomplete notes or the initial diagnosis was a different manifestation of gallstones such as pancreatitis. Those receiving interval operations were then grouped according to the mode of their initial presentation. A total of 130 case notes were analysed. RESULTS: The delay for an interval operation was 3-6 months compared with less than 2 weeks for early operations. Of patients with acute cholecystitis, 43% had early operations but only 12% of patients with cholelithiasis. Waiting for interval operations was associated with multiple re-admissions equivalent to an average of one extra presentation to accident and emergency per patient. This was particularly marked if the initial presentation was to accident and emergency rather than outpatients (P = 0.003). Complication rates were also higher in the interval group. CONCLUSIONS: Early cholecystectomy on the next available list is likely to reduce morbidity and the long-term in-patient burden so should be recommended for all patients presenting as an emergency with symptomatic gallstones.