Anatomical relationship between position of the sigmoid sinus and regional mastoid pneumatization

Aslan, Asım; Kobayashi, Tadashi; Diop, D; Balyan, Fatih R.; Russo, Alessandra; Taibah, A

doi:10.1007/bf00179948

Cited by 21 publications

(16 citation statements)

References 7 publications

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“…This might be helpful, especially in revision cases of open cavity procedures [4]. This confirms Aslan et al's [12] findings, who determined this measurement to be 10.8 mm in formalin-preserved temporal bones. In the present study, the distance between the JB and mastoid segment of facial nerve was measured.…”

Section: Discussionsupporting

confidence: 81%

The Pitfalls and Important Distances in Temporal Bone HRCT of the Subjects with High Jugular Bulbs – Preliminary Report

İnal¹,

Muluk²,

Dağ³

et al. 2015

Adv Clin Exp Med

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Background. High jugular bulb (HJB) may be detected unilaterally or bilaterally in temporal bone high resolution computerized tomography (HRCT). Objectives. In this retrospective study, we investigated the pitfalls and important surgical distances in patients with unilateral and bilateral HJB via temporal bone HRCT. Material and Methods. In this preliminary report, the study group consisted of 20 adult patients (12 male, 8 female), or 40 ears, all of which underwent temporal bone HRCT. We divided them into groups that consisted of bilateral HJB (14 ears), unilateral HJB (13 ears), and control (No HJB, 13 ears). The anotomical relationships of the sigmoid sinus, jugular bulb, and carotid artery with several landmarks in the temporal bone were studied via temporal bone axial and coronal HRCT. The shortest distances between certain points were measured. These measurements were analyzed in respect to pneumatization. Dehiscence on the jugular bulb (JB) and internal carotid artery (ICA) and the dominance of JB were also evaluated for all of the groups. Results. In the axial sections of the temporal bone HRCTs, the sigmois sinus (SS)-external auditory canal (EAC) distance of the bilateral HJB group (14.00 ± 1.17 mm) was significantly lower than that of the control group (16.46 ± 2.14 mm). The JB-posteromedial points of the umbo on the ear drum (ED) distance of the bilateral HJB (6.28 ± 1.72 mm) and the unilateral HJB groups (7.23 ± 2.00 mm) were significantly lower than that of the control group (11.15 ± 2.30 mm). In the coronal sections of the temporal bone HRCT, the JB-F distance of the bilateral HJB group (5.42 ± 2.10 mm) was significantly lower than that of the control group (8.30 ± 2.28 mm). As the mastoid pneumatisation and mastoid volume increased, the percentage of ICA-dehiscence and the percentage of JB-dehiscence increased. Conclusions. In subjects with well-pneumatised mastoids, the doctors should be aware of the increased risk of ICA-dehiscence and JB-dehiscence. These measurements should be done in greater series to yield more thorough knowledge (Adv Clin Exp Med 2015, 24, 2, 315-324).

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Section: Discussionsupporting

confidence: 81%

The Pitfalls and Important Distances in Temporal Bone HRCT of the Subjects with High Jugular Bulbs – Preliminary Report

İnal¹,

Muluk²,

Dağ³

et al. 2015

Adv Clin Exp Med

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“…Earlier reports (Shatz and Sade, 1990;Aslan et al, 1996;Ichijo et al, 1996;Sirikci et al, 2004) revealed that the h-ss distance was shorter in ears with poorly pneumatized mastoids. In this study, mastoid size was found to be significantly shorter in adults with COM than in adults with no evidence of otitis media (P < 0.000) (Tables 1 and 2).…”

Section: Discussionmentioning

confidence: 91%

Craniofacial measures of chronic otitis media patients by 2D reformatted CT

et al. 2010

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Few authors have studied differences in craniofacial morphology of adults with chronic otitis media (COM). We sought to compare the craniofacial measurements of patients with COM with otherwise healthy adults. The study group included 120 adult patients. The control group had 30 men and 30 women without evidence of otitis media; a COM group consisted of 30 men and 30 women with COM. Craniofacial measurements were assessed retrospectively using a two-dimensional reformatted CT method. Multiple linear (bony and cartilaginous auditory tube length, size of the mastoid, height of the jugular bulbus, intercochlear distance, bitemporal distance, distance between pharyngeal orifices, and some cephalometric cranial base distances), angular (auditory tube angle, cranial base angle), and area (axial and sagittal nasopharynx size) measurements were performed. In addition, petrosquamosal (Körner's) septum prevalence and size were evaluated. No statistically significant differences were found regarding craniofacial variables except mastoid size (mastoid depth and length). None of the craniofacial parameters showed significant differences between adults with COM and adults without evidence of otitis media, when age, sex, and race were considered. No statistically significant differences were found when mastoid size was compared with unilateral and bilateral COM. No statistically significant difference was found between mastoid size of the intact side and involved side of the unilateral patients with COM. Patients with unilateral and bilateral COM may be in the same group, genetically or environmentally, as far as mastoid size is concerned. Small mastoid size correlates with COM, but development of clinical disease should be under the control of different factors.

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“…When approaching the posterior cranial fossa and posterolateral cranial base, surface landmarks are used to locate the transverse-sigmoid sinus junction (Aslan et al, 1996;Ucerler and Govsa, 2006). The asterion is the mostly used landmark (Day and Manfred, 1998;Aysun et al, 2001).…”

Section: Discussionmentioning

confidence: 99%

Anatomic position of the asterion in Kenyans for posterolateral surgical approaches to cranial cavity

2009

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The asterion, defined as the junction between lambdoid, parietomastoid, and occipitomastoid sutures, has been used as a landmark in posterolateral approaches to the posterior fossa. Its reliability however has been put into question due to its population-specific variability in position, using external palpable landmarks and its relation to the transverse-sigmoid sinus complex. This study aimed at determining the anatomic position of the asterion in a Kenyan population. Measurements from the asterion to the root of zygoma and the tip of mastoid process, respectively were taken on both left and right sides of 90 (51 male, 39 female) human skulls. The relation of the asterion to the transverse-sigmoid sinus junction was also determined. The distances on the right and left sides from the asterion to the root of the zygoma were 58.85 +/- 2.50 mm and 58.44 +/- 2.12 mm, respectively. The asterion was 47.89 +/- 3.72 mm above the tip of mastoid process on the right side and 47.62 +/- 2.87 mm on the left side. This point was significantly higher in males (48.36 +/- 2.72 mm) than in females (46.62 +/- 3.37 mm) with a P-value of 0.041. Regarding its position from the transverse-sigmoid sinus junction, it was at the junction in 72 cases, below it in 17 cases (average 3.68 mm) and only one case had the asterion above this junction (2.57 mm). The asterion therefore can reliably be ascertained using the parameters from the root of the zygoma and the tip of the mastoid process. The safest approach would be posteroinferior to the asterion so as to avoid lacerating the transverse-sigmoid sinus complex.

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Anatomical relationship between position of the sigmoid sinus and regional mastoid pneumatization

Cited by 21 publications

References 7 publications

The Pitfalls and Important Distances in Temporal Bone HRCT of the Subjects with High Jugular Bulbs – Preliminary Report

The Pitfalls and Important Distances in Temporal Bone HRCT of the Subjects with High Jugular Bulbs – Preliminary Report

Craniofacial measures of chronic otitis media patients by 2D reformatted CT

Anatomic position of the asterion in Kenyans for posterolateral surgical approaches to cranial cavity

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