Pulmonology (/ˌpʌlməˈnɒlədʒi/, /ˌpʊlməˈnɒlədʒi/, from Latin pulmō, -ōnis "lung" and the Greek suffix -λογία -logía "study of"), pneumology (/nʊˈmɒlədʒi, njʊ-/, built on Greek πνεύμων pneúmōn "lung") or pneumonology (/nʊmənˈɒlədʒi, njʊ-/) is a medical specialty that deals with diseases involving the respiratory tract. It is also known as respirology, respiratory medicine, or chest medicine in some countries and areas.