Purpose: A high jugular bulb (JB) is thought to affect structures of the inner ear and possibly cause symptoms there, but clear histological findings of an anatomical relationship between a high JB and the inner ear have not yet been described. Materials and Methods: We surveyed horizontal sections of 1,591 temporal bones from the collection of the Otopathology Laboratory at the University of Minnesota in Minneapolis, Minnesota, defining a high JB as a JB extending above the inferior margin of the basal cochlear turn. Results: In 65 specimens (16%), we found a high JB with its vascular wall obviously thinner than that of a low JB. Bony resorption was occasionally observed around high JBs. Sixteen specimens showed a bony deshiscence between the JB and the endolymphatic sac. Clinical charts showed no obvious symptoms associated with a high JB. Conclusions: Our findings suggest that the JB may have potential to expand upward postnatally. Although our study confirmed occasional bony dehiscence between the JB and the endolymphatic sac, JBs with this involvement may have only a minor effect on function in the inner ear. (C) 2000 by W. B. Saunders Company.
|Original language||English (US)|
|Number of pages||8|
|Journal||American Journal of Otolaryngology - Head and Neck Medicine and Surgery|
|State||Published - Jan 1 2000|
Bibliographical noteFunding Information:
From the *Department of Otolaryngology, University of Minnesota School of Medicine, Minneapolis, MN, the tDepartment of Otolaryngology, Miyazaki Medical College, Miyazaki, Japan, the 1:Minnesota Ear, Head and Neck Clinic, Minneapolis, MN, and Lions Club International. This work was funded in part by NIH grant #P50DC03093-10 from the National Institute on Deafness and Other Communication Disorders, and by the International Hearing Foundation. Address reprint requests to Patricia A. Schachem, BS, Rm 226 Lions Research Building, 2001 6th Street SE, Minneapolis, MN 55455. Copyright © 2000 by W.B. Saunders Company 0196-0709/00/2103-0003510.00/0 doi:10.1053/AJOT.2000.6611