Related Experiment Video
Updated: Jan 19, 2026

Endaural Endoscopic Atticoantrotomy Retrograde Mastoidectomy using a Constant Suction Bone-drilling Technique
Published on: May 23, 2021
[Trochlearis palsy due to chronic sinusitis]
Elisa Skovgaard Jensen1, Steen Nepper-Christensen
1Elisa.skovgaard.jensen@regionh.dk.
Abstract:
Chronic rhinosinusitis and nasal polyposis are common rhinological diagnoses. Left untreated both diseases can result in visual dysfunctions because of their close proximity to orbita. We report a rare case of an isolated trochlear nerve palsy caused by chronic sinusitis and nasal polyposis. The patient was a healthy 54-year-old woman. She was successfully managed with sinus surgery and recovered fully. Despite the rare aetiology, diseases in the sinuses should be considered in the differential diagnosis of trochlear nerve palsy.
More Related Videos
Related Concept Videos
Chronic Pharyngitis
Etiology
It often arises from persistent viral or bacterial infections affecting sinuses and tonsils.
Additional contributing factors include inadequate dental hygiene, mouth breathing, recurring tonsillitis, allergic rhinitis, laryngopharyngeal reflux, and exposure to smoke, chemicals, and other environmental pollutants. Allergic reactions to pollen, mold, and pet dander, chronic cough, excessive voice usage,...
Accessory Structures of the Eye
Tonsillitis I: Introduction
Etiology
Three primary contributing factors have been identified.
Angle Closure Glaucoma: Treatment
Cranial Nerves: Types Part I
Olfactory Nerve (Cranial Nerve I)
The olfactory nerve, or cranial nerve I, is unique as it is purely sensory and dedicated to the sense of smell. This nerve originates in the olfactory epithelium of the...
Cranial Nerves: Types Part II
Facial Nerve (Cranial Nerve VII)
Cranial nerve VII, or the facial nerve,...

