Conditions Dr Herath cares for an extensive range of adult pulmonary conditions from the common to the complex and rare. Here are some conditions she treats. Respiratory Asthma Bronchiectasis COPD/emphysema Lung Cancer/Nodules Lung fibrosis Sarcoidosis Sleep Insomnia Sleep Apnoea Narcolepsy Restless legs Parasomnia REM Behavioural Disorder