William A. Sewell is an otolaryngologist working out of St Vincent's Hospital in Darlinghurst, NSW, Australia.
His focus is on the ear, nose and throat, especially issues that can keep coming back or hang around for months. This includes chronic rhinosinusitis with nasal polyps (CRSwNP), nasal polyps, and ongoing sinusitis. At times, symptoms like blocked or runny nose, facial pressure, reduced smell, and long-term congestion can make everyday life pretty hard, and it helps to get the cause sorted out early.
He also looks after people with allergic rhinitis. These are the sorts of problems that can flare with seasons, dust, pets, or other triggers. Getting the pattern right matters, because treatment is often about more than just one quick fix.
In some cases, careful checks and tissue testing are needed. Tissue biopsy may be part of the work-up when the story doesn’t fit the most common pattern. This can include looking for less common conditions, so people can get the right plan as soon as possible.
While most ENT care is about the nose and sinuses, William’s work can also overlap with wider health issues. The list of conditions he has supported includes B-cell lymphoma, non-Hodgkin lymphoma, plasmacytoma, and myelodysplastic syndrome (MDS). He also works with patients who have common variable immune deficiency (CVID), and this can affect how infections and inflammation behave.
There’s also a link with breathing conditions. Eosinophilic asthma can show up alongside ongoing sinus inflammation in some people, so care may involve thinking about the body as a whole, not only the nose area. Over time, better control in one area can help the other, in many cases.
William is trained as an otolaryngologist and brings practical clinical judgement to day-to-day appointments. There’s a calm, no-drama approach to explaining what’s going on and what the next step could be. Even when things are complicated, the goal stays the same: clearer answers, safer decisions, and care that fits the person in front of him.