Trio of experts speak at WCM-Q Grand Rounds
March 2017

Dr. Graham Buirski of the Radiology Department at Sidra Medical and Research Center.

Dr. Graham Buirski of the Radiology Department at Sidra Medical and Research Center.

Three leading healthcare experts gave individual presentations on pediatric imaging, polycystic ovary syndrome and the impact of gut bacteria on human health in the latest installments of WCM-Q’s Grand Rounds series.

Grand Rounds, which usually stages one lecture each month, brought three experts to WCM-Q in a single week for a special mini-series of presentations. The first featured Dr. Graham Buirski, section head of musculoskeletal imaging in the Radiology Department of Sidra Medical and Research Center, who gave a presentation entitled ‘Pediatric Imaging – What Test Do I Order?’.

John E. Nestler of Virginia Commonwealth University in Richmond, Virginia, discussed polycystic ovary syndrome.

Dr. John E. Nestler of Virginia Commonwealth
University in Richmond, Virginia, discussed
polycystic ovary syndrome.

Dr. Buirski, who is also associate professor of clinical radiology at WCM-Q, explained that physicians must carefully balance the benefit of ordering a test against the potential harm to the patient. He said: "Unfortunately, not all tests are 100 percent free of harm so we have to think about this every time we order a test. For example, some research has suggested that people who have a lot of CT scans as children are at greater risk of leukemia and brain tumors. Now the risk might be small but we still have to think very, very carefully about the tests we order and make certain that they are in the patient’s very best interests."

The second of the week’s Grand Rounds presentations was given by Dr. James D. Lewis, professor of medicine and epidemiology at the University of Pennsylvania, and was entitled ‘Modern Life at a Crossroad: The Intersection of Diet, the Gut Microbiome, Inflammation and Cancer’. Dr. Lewis explained that the human gut is home to around 100 trillion bacteria cells, which is approximately ten times the total number of cells that make up the human body. Many of these bacteria benefit human health by fermenting dietary fiber and synthesizing vitamins B and K, but overabundance of some species of bacteria appears to play a role in inflammatory disorders such as inflammatory bowel disease and irritable bowel syndrome. Inflammation of the bowel is also associated with metabolic syndrome, diabetes and bowel cancer. Dr. Lewis said: "When you have a meal you are feeding not only yourself but also those microorganisms that are living in your gut and they are going to take what you consume and turn it into other small molecules that will be circulating in your blood. This is why diet appears to be linked to inflammation, metabolic syndrome and cancer risk."

Dr. James D. Lewis, of the University of Pennsylvania, spoke about the 100 trillion bacteria that inhabit the human gut and how they affect health.

Dr. James D. Lewis, of the University of
Pennsylvania, spoke about the 100 trillion bacteria
that inhabit the human gut and how they
affect health.

Dr. John E. Nestler, William Branch Porter professor of medicine and chair of the Department of Medicine at Virginia Commonwealth University in Richmond, Virginia, discussed ‘Polycystic Ovary Syndrome and the Risk for Diabetes and Cardiovascular Disease’. Polycystic ovary syndrome (PCOS) is characterized by imbalance in a woman’s levels of the hormones estrogen and progesterone. This causes the growth of benign cysts on the ovaries, weight gain, skin problems, abnormal hair growth and fertility problems.

Dr. Nestler said that PCOS has traditionally been treated as a gynecological condition but is better understood as a general health issue closely associated with insulin resistance, type-2 diabetes, obesity and cardiovascular disease. He said: "This means that evaluation of PCOS patients should involve screening for glucose intolerance, dyslipidemia (high cholesterol), hypertension and cardiovascular disease risk. Medium- to long-term treatment should be focused on decreasing risk for early cardiovascular disease and type-2 diabetes, through use of medication and surgery if necessary but also by lifestyle changes such as diet modification."