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Updated: Oct 2, 2025

Intrathecal Application of a Fluorescent Dye for the Identification of Cerebrospinal Fluid Leaks in Cochlear Malformation
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High Riding Jugular Bulb Protruding Into Tympanic Cavity: Longitudinal Radiologic Study in a Deaf Child

Keishi Ueda1, Hiroshi Yamazaki1,2,3, Tetsuhiko Michida1

  • 1Department of Otolaryngology, Kobe City Medical Center General Hospital, Kobe, Hyogo, Japan.

Ear, Nose, & Throat Journal
|February 23, 2022
PubMed

Insights

High riding jugular bulb (HRJB) can develop and enlarge in children, potentially complicating ear surgery. This case highlights the importance of monitoring HRJB growth over time in pediatric patients.

Area of Science:

  • Otolaryngology
  • Pediatric Radiology
  • Developmental Anatomy

Background:

  • High riding jugular bulb (HRJB) is a rare condition in young children.
  • HRJB can protrude into the tympanic cavity, posing risks during otologic surgery.

Observation:

  • A 9-month-old child with congenital deafness presented with bilateral inner ear malformations and a right-sided HRJB.
  • Preoperative imaging for a planned right cochlear implantation revealed significant enlargement and protrusion of the right jugular bulb into the tympanic cavity, obscuring the round window.

Findings:

  • This is the first pediatric case demonstrating longitudinal CT evidence of HRJB development and protrusion over time.
  • The findings suggest a correlation between earlier formation of HRJB and its potential for increased growth and protrusion.

Implications:

  • Pediatricians and radiologists should consider the possibility of HRJB enlargement and protrusion, even in young children.
  • Careful preoperative assessment with CT imaging is crucial for planning otologic procedures in children with known or suspected HRJB.
Abstract

Keywords:
dehiscent jugular bulbhigh riding jugular bulbincomplete partitionjugular bulb diverticulumprotruding jugular bulb

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