We present a pictorial review of a range of typical and atypical cases of gallstone ileus (GI), across a wide range of imaging modalities. GI is a complication of gallstone disease causing mechanical intestinal obstruction due to impaction of gallstone in the gastrointestinal tract. The spectrum of presentation can vary enormously, and we highlight the importance of accurate imaging diagnosis of GI especially early use of computed tomography. This will lead to timely and appropriate surgical intervention with the potential avoidance of unnecessary outcomes. The ambition of pictorial synopsis is to make the radiologists to be more vigilant to the common and more obscure imaging findings of GI.

Penetrating injury remains a robust indication for EDT. Non-cardiothoracic cause of cardiac arrest should not preclude EDT. In the absence of on scene SOL, survival following EDT is extremely unlikely. Survival is significantly higher in the non-USA publications; reasons for this are highly complex. A UK multicentre prospective study which collects standardised data on all EDTs could provide robust evidence for better patient stratification.

INTRODUCTION Symptomatic gall stones may require laparoscopic cholecystectomy (LC), which is one of the most commonly performed general surgical operations in the western world. Patients with a high body mass index (BMI) are at increased risk of having gall stones, and are often considered at high risk of surgical complications due to their increased BMI. We believe that day case surgery could nevertheless have significant benefits in terms of potential cost savings and patient satisfaction in this population. We therefore compared the outcomes of day case patients undergoing LC stratified by BMI, with a specific focus on the safety and success of the procedure in obese and morbidly obese groups. METHODS We reviewed a database of day case procedures performed between January 2004 and December 2012, including all patients with symptomatic gall stone disease who underwent LC. The patients were divided in four BMI groups: less than 25 kg/m 2 , 25-29 kg/m 2 , 30-39 kg/m 2 and 40 kg/m 2 or above.

A significant increase in the likelihood of a perforated appendicitis occurs after 72 h of symptoms, when compared to 60-72 h. We can therefore argue that it may be reasonable to prioritise patients approaching 72 h of symptoms for operative management.