 Roughly 20 percent of individuals with coeliac disease are diagnosed after 60 years of age.The term "coeliac" is from the Greek κοιλιακός ("koiliakós", "abdominal") and was introduced in the 19th century in a translation of what is generally regarded as an Ancient Greek description of the disease by Aretaeus of Cappadocia.Humans first started to cultivate grains in the Neolithic period (beginning about 9500 BCE) in the Fertile Crescent in Western Asia, and it is likely that coeliac disease did not occur before this time.