A surgical case report of an epiploic hernia - A mobile right colon herniating through the foramen of Winslow.

INTRODUCTION: An Epiploic Hernia is an extremely rare type of abdominal hernia with <0.1 % incidence where the bowel or other intra-abdominal contents herniate through the Foramen of Winslow. A case of an Epiploic hernia in a middle-aged female is presented here. PRESENTATION OF CASE: A woman in her 60s was admitted to a tertiary level hospital with severe right sided intermittent upper abdominal pain associated with nausea, bloating and constipation. The symptoms were thought to be due to biliary colic and managed conservatively. Since the symptoms persisted and a computed tomography scan of abdomen was organized. CT scan showed that the caecum was in the upper left quadrant. A laparoscopy was performed and demonstrated that her right colon was mobile herniating through the Foramen of Winslow into the lesser sac. The hernia was reduced, and the bowel was viable. The patient was discharged with no complications. DISCUSSION: There have been case reports of small bowel as the content of the hernia with lesser occurrences of caecum, ascending colon, transverse colon, gall bladder, omentum, or Meckel's diverticulum. A caecal herniation through the Foramen of Winslow is reported only with an incidence of 0.02 %. <10 % of these Epiploic hernias are diagnosed preoperatively making it a potentially life-threatening condition if not treated promptly due to high risk of bowel strangulation and mortality of up to 50 %. CONCLUSION: A high index of suspicion is needed for the diagnosis of this internal hernia and radiological investigation is fundamental in making this diagnosis for allowing prompt surgical treatment.

Management of appendicitis during COVID-19 pandemic; short-term outcomes.

BACKGROUND AND AIM: COVID-19 pandemic has predisposed patients undergoing surgery to post-operative infection and resultant complications. Appendicitis is frequently managed by appendicectomy. After the onset of the pandemic, selected cases of appendicitis were managed with antibiotics which is a recognised treatment option. Our objective was to compare the management of appendicitis and post-operative outcomes between pre- and post-COVID-19. METHODS: Ninety-six patients were identified from before the onset of the pandemic (November 2019) to after the onset of the pandemic (May 2020). Data were collected retrospectively from electronic records including demographics, investigations, treatment, duration of inpatient stay, complications, readmissions and compared between pre- and post-COVID-19 groups. RESULTS: One hundred percent underwent surgical treatment before the onset of pandemic, compared with 56.3% from the onset of the pandemic. A greater percentage of patients were investigated with imaging post-COVID-19 (100% versus 60.9%; p < 0.00001). There was no significant difference in the outcomes between the two groups. CONCLUSION: CT/MRI scan was preferred to laparoscopy in diagnosing appendicitis and conservative management of uncomplicated appendicitis was common practice after the onset of pandemic. Health boards can adapt their management of surgical conditions during pandemics without adverse short-term consequences. Long term follow-up of this cohort will identify patients suitable for conservative management.

Cyclooxygenase/lipoxygenase shunting lowers the anti-cancer effect of cyclooxygenase-2 inhibition in colorectal cancer cells.

BACKGROUND: Arachidonic acid metabolite, generated by cyclooxygenase (COX), is implicated in the colorectal cancer (CRC) pathogenesis. Inhibiting COX may therefore have anti-carcinogenic effects. Results from use of non-steroidal anti-inflammatory drugs inhibiting only COX have been conflicting. It has been postulated that this might result from the shunting of arachidonic acid metabolism to the 5-lipoxygenase (5-LOX) pathway. Cancer cell viability is promoted by 5-LOX through several mechanisms that are similar to those of cyclooxygenase-2 (COX-2). Expression of 5-LOX is upregulated in colorectal adenoma and cancer. The aim of this study was to investigate the shunting of arachidonic acid metabolism to the 5-LOX pathway by cyclooxygenase inhibition and to determine if this process antagonizes the anti-cancer effect in colorectal cancer cells. METHODS: Three colorectal cancer cell lines (HCA7, HT-29 & LoVo) expressing 5-LOX and different levels of COX-2 expression were used. The effects of aspirin (a non-selective COX inhibitor) and rofecoxib (COX-2 selective) on prostaglandin E2 (PGE2) and leukotriene B4 (LTB4) secretion were quantified by ELISA. Proliferation and viability were studied by quantifying double-stranded DNA (dsDNA) content and metabolic activity. Apoptosis was determined by annexin V and propidium iodide staining using confocal microscopy, and caspase-3/7 activity by fluorescent substrate assay. RESULTS: COX inhibitors suppressed PGE2 production but enhanced LTB4 secretion in COX-2 expressing cell lines (P <0.001). The level of COX-2 expression in colorectal cancer cells did not significantly influence the anti-proliferative and pro-apoptotic effects of COX inhibitors due to the shunting mechanism. CONCLUSIONS: This study provides evidence of shunting between COX and 5-LOX pathways in the presence of unilateral inhibition, and may explain the conflicting anti-carcinogenic effects reported with use of COX inhibitors.