Based on the Australian Bureau of Statistics National Health Survey data about one in three people over the age of 18 living in Australia have hypertension or were taking blood pressure lowering medications. A staggering number requiring therapy for a condition which impacts on cerebrovascular disease, coronary artery disease, chronic kidney disease, heart failure and mortality.

Up to two thirds of Australians are either overweight or obese as defined by body mass index (overweight: BMI 25-29.9, obese: BMI >30) with subsequent significant medical consequences including cardiovascular disease, type 2 diabetes, cerebrovascular disease (metabolic syndrome), osteoarthritis and depression. Becoming overweight and obese involves complex interactions between neurohormonal systems of the gut, neurobiology of the brain (particularly the hypothalamus) and leptin production from adipose sites coupled with an environment where there is an abundance of high glycaemic energy dense foods. Science demonstrates that the overarching controls of obesity are genetic (70%) rather than environmental (30%). Adoption studies relating to monozygotic twins demonstrate this. In view of the metabolic consequences of obesity, understanding why we get fat is extremely important to medical practitioners.

The spleen performs a large number of important functions including processing and removal of opsonized pathogens, cellular maintenance, immunoglobulin production and the removal of effete worn out red blood cell. When removed either through trauma or for therapeutic indications the risk of overwhelming post splenectomy infection (OPSI) increases significantly; up to 58 times the general population in the setting of trauma and up to 1,100 times increased risk when for thalassaemia.