1 . In the language of medicine, it consists of the presence of salivary tissue outside the major and minor salivary glands. It is an uncommon pathology, which is also known as chorystoma. 2 . In philosophical language, especially in Foucault, it is a term currently unavoidable in any discourse on the contemporary city, being the space of the contemporary world par excellence. In contrast to the hierarchically organized ensemble that characterized the medieval territory, in the words of the French philosopher himself: "we do not live in a kind of vacuum, within which we locate individuals and things. ( . . . We live within a web of relationships that delineate places that are irreducible to each other and absolutely impossible to superimpose." The concept of heterotopia as a heterogeneous space of places and relationships would be of vital importance to geographers and economists in the following decades when defining the contemporary city itself.
