Undiagnosed type 2 diabetes mellitus presenting with orbital cellulitis.

The authors describe the case of a 48 years old woman who presented with a one week history of a painful, swollen left eye with proptosis and diplopia. A computed tomography (CT) scan showed features of left orbital cellulitis, and blood tests and urinalysis confirmed the diagnosis of diabetes mellitus. The infection resolved following a course of intravenous antibiotics and with glycaemic control. To our knowledge, undiagnosed diabetes mellitus presenting with orbital cellulitis has not previously been reported.