Rubeosis faciei diabeticorum: a common, but often unnoticed, clinical manifestation of diabetes mellitus.

In this clinical image, we present the picture of a diabetic patient with rubeosis faciei diabeticorum, a relatively common, but usually unnoticed, microangiopathic complication of diabetes mellitus that could herald other more notorious microangiopathic complications of diabetes mellitus, such as retinopathy. This case will help other physicians to consider rubeosis faciei diabeticorum whenever they face similar cases.