Asymptomatic enophthalmos: the silent sinus syndrome.

Although uncommon, enophthalmos may be a presenting symptom of chronic maxillary sinusitis with secondary attentuation of the orbital floor. As such, as awareness of this entity, known as the "silent sinus syndrome," is important to all practising otolaryngologists. Two such cases are presented herein, together with a discussion of the pathophysiology, management, and current literature.