Introduction The annual incidence of thyroid cancer is known to vary with geographic area, age and gender. The increasing incidence of thyroid cancer has been attributed to increase in detection of micropapillary subtype, among other factors. The aim of the study was to investigate time trends in the incidence of thyroid cancer in Singapore, an iodine-sufficient area. Materials and methods Data retrieved from the Singapore National Cancer Registry on all thyroid cancers that were diagnosed from 1974 to 2013 were reviewed. We studied the time trends of thyroid cancer based on gender, race, pathology and treatment modalities where available. Results The age-standardised incidence rate of thyroid cancer increased to 5.6/100,000 in 2013 from 2.5/100,000 in 1974. Thyroid cancer appeared to be more common in women, with a higher incidence in Chinese and Malays compared with Indians. Papillary carcinoma is the most common subtype. The percentage of papillary microcarcinoma has remained relatively stable at around 38% of all papillary cancers between 2007 and 2013. Although the incidence of thyroid cancer has increased since 1974, the mortality rate has remained stable. Conclusion This trend of increase in incidence of thyroid cancer in Singapore compares with other published series; however, the rise seen was not solely due to micropapillary type. Thyroid cancer was also more common in Chinese and Malays compared with Indians for reasons that needs to be studied further.

Background: Despite advances in the medical management of peptic ulcer disease, duodenal ulcer (DU) perforation remains a common surgical emergency. Most DU perforations are small and can be managed with omental patch repair. However, occasionally the surgeon may encounter a giant perforation not amenable to this. Giant DU perforations are defined as > 2cm. They are associated with high leak rates and mortality. Prognosis in elderly patients are particularly poor because of advanced age and comorbidities. Furthermore, there are no specific recommendations for their management despite a variety of repair techniques being described. Here, we aim to describe a novel technique used to treat such patients, especially those of advanced age, in our institution and to review the current literature. Case presentation: Four patients with giant DU perforation underwent emergency laparotomy and repair with our duodenojejunostomy technique at our hospital. Post-operatively, patients were monitored clinically and radiologically and discharged when well and tolerating diet. The mean age of the patients was 67 years with an equal gender distribution. The average Charlson Comorbidity Index (CCI) score was 3 (moderately severe). All presented with peritonitis and two had concomitant bleeding. There were two anterior and two posterior ulcers. One was a revision repair after a leak post laparoscopic omental patch repair for the initial perforation. In all cases, the duodenojejunostomy repair technique was used. Post-operative recovery was uneventful for all except one who developed pneumonia. In particular; there were no anastomotic leaks, intra-abdominal collections, gastric outlet obstructions or mortalities. Conclusion: Giant DU perforation remains a challenge to the general surgeon, particularly so in elderly patients with multiple comorbids. A review of the current literature suggests a myriad of surgical techniques but no perfect solution. Some suggested techniques include omental patch with pyloric exclusion, controlled tube duodenostomy, jejunal pedicled graft or serosal patch, gastric disconnection and partial gastrectomy. Here, we propose that isolated duodenojejunostomy can be a quick, safe and novel solution that ensures definitive repair of giant ulcer perforation in a single setting in the high-risk patient.

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