Pulmonology is a medical specialty that deals with diseases involving the respiratory tract. The term is derived from the Latin word pulmō, pulmōnis ("lung") and the Greek -λογία, -logia. Pulmonology is synonymous with pneumology (from the Greek πνεύμων ("lung") and -λογία, -logia), respirology and respiratory medicine.Pulmonology is known as chest medicine and respiratory medicine in some countries and areas.