Gary M. Leong is a paediatric endocrinologist based in Sydney, NSW, Australia. He looks after kids and teens with hormone and growth-related health issues, and he also helps manage complex metabolic problems that can affect daily life.
In many cases, families come in for support with growth concerns, such as delayed growth or short stature. At other times, the focus is on weight and metabolism, including childhood obesity and type 2 diabetes. He also treats conditions where the body’s hormone signals are out of balance, which can show up in different ways depending on the child.
Some patients need care for sugar and insulin regulation issues, including congenital hyperinsulinism. Others may be dealing with episodes where blood sugar becomes dangerously high, such as diabetic ketoacidosis. There are also cases linked to dehydration, where getting the right treatment early can make a big difference.
Gary also works with children who have differences in sex development, including intersex conditions and partial androgen insensitivity syndrome (PAIS). He may be involved in ongoing care for conditions like Prader-Willi syndrome, where hormone and appetite signals can affect growth and energy use.
Over time, he helps families understand what is happening in a way that fits real life at home. Hormone conditions can be stressful, especially when there are school days, sports, and changing routines. In many cases, families want clear next steps, close monitoring, and a plan that can be followed between appointments.
Gary’s practice focuses on paediatric endocrinology, with specialist training in this area. His experience also covers related complications that can happen alongside these conditions, including dehydration and short-term metabolic flare-ups. He works with the broader care team when that’s needed, so kids get coordinated support rather than a one-off visit.
For research and clinical trials, no specific trial or study details are listed here. What matters most in clinic is safe, practical care for each child’s situation, with treatment decisions based on the child’s symptoms, growth, and overall health.