Related Experiment Video
Updated: Jun 14, 2026
05:50
Gastric Point of Care Ultrasound in Adults: Image Acquisition and Interpretation
Published on: September 22, 2023
The imploding antrum syndrome: an unusual cause of double vision
Karen Stevens1, Salah Omer, Brenda Toocaram
1Neurology Department, Kingston Hospital NHS Trust, Surrey KT2 7QB, UK. karen.stevens@doctors.net.uk
Practical Neurology
|March 24, 2010
Summary
Silent sinus syndrome caused eyelid drooping and double vision in a patient. Surgical treatment resolved these symptoms, highlighting the condition
Area of Science:
- Ophthalmology
- Otolaryngology
- Radiology
Background:
- Silent sinus syndrome is a rare condition characterized by spontaneous, asymptomatic inverse९ntrusion of the maxillary sinus walls.
- It can lead to secondary orbital complications, including extraocular muscle dysfunction.
Observation:
- A 42-year-old male presented with acute right eyelid ptosis and intermittent diplopia.
- Clinical examination revealed mechanical restriction of left eye elevation.
- MRI showed maxillary sinus abnormality with inferior rectus muscle prolapse.
Findings:
- CT scan confirmed the diagnosis of 'imploding antrum' or silent sinus syndrome.
- The condition caused entrapment and mechanical dysfunction of the left inferior rectus muscle.
Implications:
- Surgical intervention for silent sinus syndrome can effectively restore ocular motility and resolve associated symptoms.
- Early diagnosis and management are crucial for preventing persistent visual disturbances and improving patient outcomes.
Related Concept Videos
01:25Glaucoma: Overview
Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...
01:28Angle Closure Glaucoma: Treatment
Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...
01:24Esophageal Varices-I: Introduction
Esophageal varices are dilated, tortuous veins which are found mainly in the submucosa of the lower esophagus but which may also appear higher up or extend into the stomach. They develop due to increased pressure in the portal venous system, often as a result of liver cirrhosis. This condition scars and damages the liver, impeding normal blood flow through the portal vein. To compensate, blood seeks alternative pathways, forming fragile new vessels (varices) in the esophagus and stomach. These...
01:11Pyloric Obstruction
Pyloric obstruction, also referred to as gastric outlet obstruction, is a condition characterized by narrowing or blockage at the pylorus—the muscular valve regulating the flow of stomach contents into the duodenum. When this passage becomes impaired, the stomach cannot effectively empty its contents into the small intestine. This disruption leads to a range of gastrointestinal symptoms, including early satiety, bloating, epigastric pain, postprandial nausea, persistent vomiting, and...
01:16Focusing of Light in the Eye
Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
01:27Esophageal Achalasia
Esophageal achalasia is a chronic neurogenic disorder characterized by impaired relaxation of the lower esophageal sphincter (LES) and absent or ineffective peristalsis in the distal esophagus. This leads to a functional obstruction without a physical blockage, despite significant disruption of esophageal motility.EtiologyAchalasia is caused by degeneration of the myenteric (Auerbach's) plexus, specifically the loss of inhibitory ganglion cells that produce vasoactive intestinal peptide (VIP)...