[General diseases and dysfunction of the stomatognathic system].

There are two cases of general diseases [progressive systemic sclerosis (PSS) and nasopharyngeal cancer], which assumes with dysfunction of the stomatognathic system. The authors which are aware of all above made an extensive reference of the details of these diseases and in relation with the dysfunction of the stomatognathic system. The conclusion of this paper is the important role of clinical consideration for the differential diagnosis of similar cases.