Silent sinus syndrome
Related Experiment Video
Updated: Apr 23, 2026

Establishment of a Modified Ferric Chloride-Induced Superior Sagittal Sinus Thrombosis
Published on: December 30, 2025
1aDepartment of Neurology bDepartment of Ophthalmology, Northshore University Healthsystem, Evanston, Illinois, USA.
Purpose Of Review:
Symptoms of diplopia, abnormal eyelid signs (retraction, ptosis, absent crease), ocular asymmetry (hypoglobus, enophthalmos), and dry eyes from lagophthalmos could all indicate the diagnosis of silent sinus syndrome. It is important for the physician to be updated on this relatively rare clinical entity.
Recent Findings:
Silent sinus syndrome lies on a spectrum of other forms of sinus-related orbitopathy. Uncommon presentations and descriptions of sinus involvement other than the maxillary sinus add to the variability of presentation. Radiographic features of disease include an opacified and hypoplastic sinus, a lateralized uncinate process, depression of the orbital floor, and a blocked osteomeatal complex. Management of silent sinus syndrome may include a single or multistage surgical approach, or a nonsurgical approach.
Summary:
This review discusses silent sinus syndrome from a neuro-ophthalmological perspective.
Related Concept Videos
ECG Interpretation of Arrhythmias I: Sinus Arrhythmias
Types of Arrhythmias
Sinus Node Arrhythmias
Sinus Bradycardia: Originating from the sinoatrial (SA) node, sinus bradycardia involves slower impulses, resulting in a heart rate of less than 60 beats per minute (bpm). Causes include sleep, vagal stimulation, beta-blockers, hypothyroidism,...
Sinusoidal Sources
In homes, the power supplies use sinusoidal sources to provide electricity. These sources generate a voltage that varies sinusoidally...
Graphical and Analytic Representation of Sinusoids
The first step is measuring the peak-to-peak value, which is twice the amplitude of the sinusoid. This provides information about the maximum voltage swing of the waveform.
Secondly, the period and angular frequency are determined. The period is the time taken for one complete cycle of the waveform, while...
Anatomy of Respiratory System I: Upper Respiratory Tract
Nose and nasal cavity
The nose and nasal cavity represent the main external openings of the respiratory tract....
Decreased pulse rate
There are specific risk factors that can elevate the likelihood of developing bradycardia. Advanced age is a significant factor, with...
Dysrhythmias IV: Characteristics of Bradyarrhythmias

