Benjamin P. Jonker is an Endocrinologist who works at St Vincent's Hospital in Darlinghurst, NSW, Australia.
His clinic care centres on hormone and body balance problems. In many cases, this means looking after people with conditions that affect the pituitary, thyroid, and hormone signals across the body. Some patients come in with ongoing issues like hypothyroidism, hypopituitarism, and Cushing’s disease, where the body’s hormone levels can be either too high or too low.
Because hormones are closely linked with the brain, he also sees people with brain and nearby areas conditions that can change hormone function. This can include pituitary tumours, hypothalamic tumours, and other brain tumours. At times, people also need support when they have problems with fluids and salts, such as diabetes insipidus (DI) or SIADH, where the body’s water balance does not work as it should.
There are also situations where hormone medicines or other treatments can cause side effects. For example, drug induced dyskinesia and other complications may be part of the bigger picture, and care often involves working out what is happening and what helps most.
Benjamin also works with some conditions that fit under a wider “nervous system and movement” umbrella, such as essential tremor. Some patients may have had or be planning procedures like deep brain stimulation, thalamotomy, or microvascular decompression. When someone’s symptoms and hormone health overlap, it helps to have the same team thinking about both.
St Vincent’s Hospital is based in inner Sydney, and appointments are suited to people who need clear, practical medical care for complex, long-term problems. Over time, that can mean making sure diagnosis is right, symptoms are tracked, and treatment plans are kept steady and realistic.
Training and education details are not listed here, and there is no specific research or clinical trial information included. If you’d like more detail about his background, the best step is to ask the clinic team when you book.
