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tympanomastoid suture

Somnath Saha, Sudipta Pal, Moushumi Sengupta, Kanishka Chowdhury, Vedula Padmini Saha, Lopamudra Mondal
To find out the most easily identifiable and anatomically consistent landmark for identification of facial nerve during parotid surgery. Ten cadaveric dissections and ten live parotid surgeries for different types of parotid tumours were done. Cadaveric dissection was performed in the Department of Anatomy and the surgeries were done in the Department of ENT and Head and Neck surgery of R. G. Kar Medical College of Kolkata. The distance of the facial nerve trunk from three most commonly used landmarks (viz...
January 2014: Indian Journal of Otolaryngology and Head and Neck Surgery
Jerzy Kuczkowski, Małgorzata Potocka, Grazyna Kobierska-Gulida, Tomasz Przewoźny, Mirosława Dubaniewicz-Wybieralska
INTRODUCTION: Osteomas and exostoses of the external auditory canal are benign tumours arising in bones, leading to its obstruction and causing hearing loss. The treatment of these entities may present a therapeutic dilemma. AIM OF THE STUDY: To assess epidemiological and clinical data and surgical treatment effectiveness. SUBJECTS AND METHODS: The study group consisted of 21 patients (14 men and 7 women) between 18 to 63 years of age, treated in the Otorhinolaryngology Department of Medical University of Gdańsk from 1995 to 2009...
November 2010: Otolaryngologia Polska
Paul M Rea, Gerry McGarry, John Shaw-Dunn
In addition to using intra-operative facial nerve monitoring in helping to locate the position of the facial nerve in anterograde parotidectomy, numerous soft tissue and bony landmarks have been proposed to assist the surgeon in the early identification of this nerve. There is still dispute within the literature as to the most effective method, if any, of locating the nerve. The purpose of this study was to measure the distance (in twenty-six embalmed cadavers) from four of the most commonly used surgical landmarks to the main trunk of the facial nerve-the posterior belly of digastric muscle (PBDM), the tragal pointer (TP), the junction between the bony and cartilaginous ear canal (EAM) and the tympanomastoid suture (TMS)...
February 20, 2010: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
N Pather, M Osman
Facial nerve paralysis is a daunting potential complication of parotid surgery and is widely reported. Knowledge of the key landmarks of the facial nerve trunk is essential for safe and effective surgical intervention in the region of the parotid gland. In current practice, wide ranges of landmarks are used to identify the facial nerve trunk, however, there is much debate in the literature about the safety and reliability of each of these landmarks. The aim of this study, therefore, was to evaluate the relation of the surrounding anatomical structures and surgical landmarks to the facial nerve trunk...
May 2006: Surgical and Radiologic Anatomy: SRA
Sabrina Koesling, Petra Kunkel, Thomas Schul
PURPOSE: Subtle bony structures, small canals and fine sutures cause sometimes problems in the analysis of CTs of the temporal bone. The aim of this study was: to analyze the visibility of subtle structures and to estimate the incidence of vascular anomalies. PATIENTS AND METHOD: We retrospectively analyzed axial scans of 223 high-resolution CTs of the temporal bone obtained as single slice or spiral CT with 1mm slice thickness. All CTs had clinical indications...
June 2005: European Journal of Radiology
Robert L Witt, Gregory S Weinstein, Lidia K Rejto
OBJECTIVES/HYPOTHESIS: To prove that the tympanomastoid suture (TMS) is a significantly closer and less variable anatomic landmark to the facial nerve than the posterior-superior margin of the posterior belly of the digastric muscle (PBD) in parotid surgery. MATERIALS AND METHODS: A prospective study of 14 cadaver specimens and 22 live patients comparing the closest measured distances between the TMS and PBD to the facial nerve. RESULTS: The mean closest distances from the TMS and PBD to the facial nerve were 1...
April 2005: Laryngoscope
Lynne H Y Lim, Christopher J Hartnick, J Paul Willging
The authors report a rare case of first branchial sinus with combined Work's type I and type II characteristics. Instead of a sinus opening in the neck, this sinus opened above the angle of the jaw in the face. The facial nerve was significantly more superficial to the tympanomastoid suture line than normal. Early diagnosis, ensuring complete resection, and avoidance of facial nerve injury are challenging issues discussed here.
October 2003: Journal of Pediatric Surgery
No abstract text is available yet for this article.
October 1963: American Surgeon
J A de Ru, P P van Benthem, R L Bleys, H Lubsen, G J Hordijk
Many surgical landmarks have been suggested to help the surgeon identify the facial nerve when performing parotid gland surgery. There is no conclusive evidence that any one landmark is better than the rest. In this study distances from the most frequently used surgical landmarks to the main trunk of the facial nerve were measured in 30 halves of cadaver heads. Two ENT surgeons assessed the best landmark in each case. The tympanomastoid suture was nearest to the main trunk and was therefore considered the most reliable landmark...
February 2001: Journal of Laryngology and Otology
T Ulug, K Sahinoglu, A Oztũrk, Z Ari
This study was made on twenty-one formalin fixed, adult skull left-half specimens. Each of the measurements was made using callipers accurate to 0.1 mm. The dissection of the temporal bone was begun with simple mastoidectomy and completed when the endosteum of the semicircular canals were opened. During the temporal bone dissection step by step, eleven different measurements have been made with small size callipers, and mean, median, range and standard deviations have been determined. The following set of correlations was found to be significant; I--The correlation between the orbitomeatal length and the distance from the most lateral point of the tympanomastoid suture to the facial canal (r = 0...
October 1998: Okajimas Folia Anatomica Japonica
H Takahashi, M Kawanishi, T Maetani
Two cases with almost identical anomalies of the facial nerve and ossicles were reported. The two girls, ages 9 and 14 years, with unilateral hearing loss underwent exploratory tympanotomy. A huge suprameatal spine and tumor-like swelling of the facial nerve at the tympanic portion as well as its abnormal branching at the pyramidal bend were noted; one of the branches of the facial nerve appeared on the surface of the temporal bone running through the tympanomastoid suture. The distal parts of the long process and lenticular process of incus were missing as if they were eroded by the swollen facial nerve, and the superstructure of the stapes also was absent...
November 1998: American Journal of Otology
I Tekdemir, A Aslan, A Elhan
The results of a clinico-anatomic study of the auricular branch of the vagus nerve (ABVN) and Arnold's ear-cough reflex are presented. The frequency of the ear-cough reflex was found to be 2.3% (12 out of 514 patients). It was bilateral in 3 cases (0.6%). The reflex was elicited by palpation of the postero-inferior wall of the external acoustic meatus (EAM) in 11 patients, and by palpation of the antero-inferior wall in one patient (0.2%). The reflex was frequently noticed to occur after a short latent period...
1998: Surgical and Radiologic Anatomy: SRA
J L Kemink, M D Graham
Osteomas and exostoses have distinct clinical and histopathologic features. Osteomas are usually solitary, pedunculated, bony growths attached to the tympanosquamous or tympanomastoid suture line, characterized histologically by an internal structure of abundant discrete fibrovascular channels surrounded by irregularly oriented lamellated bone. Exostoses are usually multiple, bilaterally symmetrical, broad based elevations of bone involving the tympanic bone. They are histologically characterized by parallel, concentric layers of subperiosteal bone...
April 1982: Journal of Otolaryngology
J L Sheehy
The clinical, surgical, and postoperative findings were reviewed in 84 operations for correction of bony stenosis of the external auditory canal caused by diffuse exostoses. Sixteen operations for removal of a solitary osteoma of the external auditory canal are also included in the review. The solitary osteoma is an uncommon unilateral lesion, attached to the tympanosquamous or tympanomastoid suture line, almost always in the outer half of the ear canal. Removal is indicated in most cases and may be performed through the external meatus under local anesthesia...
May 1982: Otolaryngology—Head and Neck Surgery
H F Schuknecht, J R Chandler
The ideal patient for a radical mastoidectomy with total tympanomastoid cavity obliteration is one with chronic granulomatous otomastoiditis without cholesteatoma, profound sensorineural hearing loss, and a normal ear on the opposite side. A meticulous and thorough classical radical mastoidectomy is required. The resultant cavity is eliminated by filling it with pedicled flaps and/or adipose tissue taken from the abdominal wall. Suturing the skin of the anterior and posterior membranous canal walls completes the procedure...
November 1984: Annals of Otology, Rhinology, and Laryngology
M J Levenson, G Ahuja, T Bergeron
Spontaneous extracranial pneumatoceles unassociated with trauma are rare. We report a case of spontaneous extracranial mastoid pneumatocele associated with exuberant pneumatization of the calvarium and mastoid. The patient presented with a compressible bulge over the base of the zygoma and superior to the pinna. Surgical exploration demonstrated a large air sac in continuity with nontraumatic bony defects of the tympanosquamous and tympanomastoid sutures.
January 1989: Archives of Otolaryngology—Head & Neck Surgery
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