What Are We Missing
A persistent dry cough also deserves investigation, particularly when repeated treatment fails to resolve it.
Dr Viswesvaran, senior consultant – interventional pulmonology & sleep medicine, Yashoda Hospitals, says one of the biggest problems in ILD is delayed recognition.
WHEN “I’M JUST GETTING OLDER” ISN’T THE ANSWER
“Progressive breathlessness during routine activities should not simply be dismissed as ageing, weight gain or lack of fitness. When a person who previously climbed stairs comfortably begins stopping frequently, avoids walking uphill or can no longer keep pace with family members, that change deserves attention.” A persistent dry cough also deserves investigation, particularly when repeated treatment fails to resolve it. “Rather than repeatedly assuming that it is another chest infection, we need to reconsider the diagnosis.”
WHEN AN X-RAY ISN’T ENOUGH
ILD comprises more than 200 disorders involving inflammation and scarring of the lungs. “A normal chest X-ray does not necessarily exclude early interstitial lung disease. When the clinical history continues to suggest ILD, an HRCT of the chest can provide much more information about patterns of inflammation and fibrosis.”
But imaging is only part of the picture. “A detailed history, examination and, importantly, an assessment of possible environmental and occupational exposures are all part of putting the picture together,” says Dr Viswesvaran.
THE CLUE MAY BE HIDING AT HOME
He recalls a woman who had been treated for almost a year for what was thought to be recurrent bronchitis. An HRCT eventually revealed fibrotic hypersensitivity pneumonitis. The crucial clue was her regular exposure to birds at home. “The right diagnosis often begins with the right question. In patients with suspected ILD, I specifically ask about birds, mould, dampness, dust, occupational exposures and other environmental contacts because these may appear completely ordinary to the patient.”
Someone may live with birds for years without considering the exposure relevant to their breathing problem. “But in certain forms of hypersensitivity pneumonitis, identifying and removing the offending exposure can become an important part of management.”