Caliber persistent artery in the palate of an Egyptian patient with type 2 diabetes mellitus: a rare case report.

This paper reports a very rare case of isolated ulcerative lesion of the palate in a patient with type 2 diabetes mellitus. The patient refused to run any radiological tests, other than the periapical radiograph. This rendered the diagnostic dilemma more challenging. Through histochemical and immunohsitochemical stains, the case could be non-invasively diagnosed as caliber-persistent artery. All differential diagnoses were excluded based on concrete findings.