Related Experiment Video
Updated: Feb 6, 2026

Identifying Coronary Artery Calcification on Non-gated Computed Tomography Scans
Published on: August 28, 2018
Novel Computed Tomography Findings Suggestive of Perilymph Gusher
Varun V Varadarajan1, Reordan O DeJesus2, Patrick J Antonelli1
1Department of Otolaryngology.
Objectives:
Perilymphatic gusher (PLG) is an uncommon complication of stapedectomy and cochlear implant placement. Computerized tomography (CT) may reveal congenital dysplasia responsible for PLG but may also be (incorrectly) interpreted as normal. The aim of this study was to review CT findings in patients with PLG reported to have normal temporal bones.
Patients:
Patients in which a PLG was encountered and preoperative CT imaging had been interpreted as normal.
Intervention:
Collaborative review of temporal bone computed tomography by neurotologist and neuroradiologist.
Main Outcome Measure:
Identification of undetected inner ear anomalies that may predispose to PLG.
Results:
Unanticipated PLG was encountered during stapes surgery in two patients and cochlear implantation in one. A focal bony dehiscence between the basal turn of the cochlea and internal auditory canal (IAC) was identified on a few oblique reformatted images in all patients.
Conclusions:
High resolution CT with oblique image reformatting is essential to identify focal communication between the IAC and basal turn of the cochlea in ears with PLG.
Related Concept Videos
Computed Tomography
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
Imaging Studies III: Computed Tomography
Finding the Center of Gravity
Respiratory System Abnormal Finding I: Inspection and Percussion
Inspection Findings
During an inspection, several findings may suggest the presence of respiratory distress or disease. Pursed-lip breathing, where exhalation is slowed by...
Finding Electric Potential From Electric Field
Cardiovascular System Abnormal Findings I: Inspection and Palpation
Abnormal findings observed during an inspection

