H Ric Harnsberger

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A 5-year-old boy was evaluated for a left retrotympanic mass found at otoscopy. Subsequent petrous bone CT and MR angiographic examinations demonstrated bilateral aberrant internal carotid, bilateral stapedial artery persistence, and bilateral duplicated internal carotid arteries. Imaging findings and their clinical relevance are discussed. A second case of(More)
Anomalies of the course of the facial nerve have been reported in association with middle and inner ear malformations. Bifurcation of its intratemporal portion is a rare malformation in which focal splitting of one or more facial nerve segments occurs. We describe the CT appearance of this anomaly and discuss its possible embryology. Facial nerve(More)
BACKGROUND AND PURPOSE Masses in the parotid tail can be a source of consternation to radiologists and clinicians; inaccurate localization may lead to significant iatrogenic complication. We sought to review the pertinent anatomic localizing features of the parotid tail, relevant facial nerve anatomy, and sources of clinical and radiologic confusion. To(More)
BACKGROUND AND PURPOSE High-resolution T2-weighted fast spin-echo MR imaging provides excellent depiction of the cisternal and intracanalicular segments of the vestibulocochlear and facial nerves. Absence or reduction in caliber of the cochlear nerve (deficiency) has been described in association with congenital sensorineural hearing loss (SNHL). Depiction(More)
OBJECTIVE To outline the diagnosis and management of intralabyrinthine schwannomas and to propose a new classification system to further define them. STUDY DESIGN Retrospective case review. SETTING Tertiary referral center at a university hospital. PATIENTS Twenty-eight patients seen at the institution with intralabyrinthine schwannomas between 1996(More)
OBJECTIVE To describe the imaging findings and clinical outcomes of children with apparent cochlear nerve aplasia undergoing cochlear implantation. STUDY DESIGN Retrospective case review. SETTING Tertiary care center. PATIENTS Three patients with imaging findings consistent with absent cochlear nerve canal on diagnostic imaging and questionable(More)
  • Richard H Wiggins Iii, H Christian Davidson, H Ric Harnsberger, Jason R Lauman, Patricia A Goede, Lake City +1 other
  • 2001
Despite the rapid growth of the Internet for storage and display of World Wide Web– based teaching files, the available image file formats have remained relatively limited. The recently developed portable networks graphics (PNG) format is versatile and offers several advantages over the older Internet standard image file formats that make it an attractive(More)
Ganglion cysts arising from the temporomandibular joint are rare entities that often present with swelling and minimal to no pain in the preauricular region. To the authors' knowledge, a temporomandibular joint ganglion cyst occurring with acute facial nerve palsy and intracranial extension has never been reported. The patient in the current case initially(More)
BACKGROUND AND PURPOSE Cholesteatoma is an inflammatory lesion of the temporal bone that uncommonly involves the external auditory canal (EAC). In this large case series, we aimed to define its imaging features and to determine the characteristics most important to its clinical management. METHODS Thirteen cases of EAC cholesteatoma (EACC) were(More)
BACKGROUND AND PURPOSE Occasionally, diving ranulas may attain large dimensions (giant ranula); gross involvement of the submandibular and parapharyngeal spaces makes differentiation from other cystic neck masses, particularly cystic hygroma, difficult. As diving ranula and cystic hygroma are managed with different surgical approaches, avoidance of this(More)