Persistent Petrosquamosal Sinus: High Incidence in Cases of Complete Aplasia of the Semicircular Canals

Giesemann, Anja; Goetz, G. Friedrich; Neuburger, Jürgen; Lenarz, Thomas; Lanfermann, Heinrich

doi:10.1148/radiol.11101466

Cited by 26 publications

(19 citation statements)

References 8 publications

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“…However, several authors have reported it to be present in 11–89 % of CHARGE patients [9, 13–15]. The highest incidence was described by Giesemann et al [14], in patients who all had aplasia of the SCCs. In our patient population, which included patients with partially and fully developed vestibular systems, a persistent petrosquamosal sinus was seen in 13 %.…”

Section: Discussionmentioning

confidence: 99%

CT findings of the temporal bone in CHARGE syndrome: aspects of importance in cochlear implant surgery

Vesseur

Verbist

Westerlaan

et al. 2016

Eur Arch Otorhinolaryngol

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To provide an overview of anomalies of the temporal bone in CHARGE syndrome relevant to cochlear implantation (CI), anatomical structures of the temporal bone and the respective genotypes were analysed. In this retrospective study, 42 CTs of the temporal bone of 42 patients with CHARGE syndrome were reviewed in consensus by two head-and-neck radiologists and two otological surgeons. Anatomical structures of the temporal bone were evaluated and correlated with genetic data. Abnormalities that might affect CI surgery were seen, such as a vascular structure, a petrosquamosal sinus (13 %), an underdeveloped mastoid (8 %) and an aberrant course of the facial nerve crossing the round window (9 %) and/or the promontory (18 %). The appearance of the inner ear varied widely: in 77 % of patients all semicircular canals were absent and the cochlea varied from normal to hypoplastic. A stenotic cochlear aperture was observed in 37 %. The middle ear was often affected with a stenotic round (14 %) or oval window (71 %). More anomalies were observed in patients with truncating mutations than with non-truncating mutations. Temporal bone findings in CHARGE syndrome vary widely. Vascular variants, aberrant route of the facial nerve, an underdeveloped mastoid, aplasia of the semicircular canals, and stenotic round window may complicate cochlear implantation.

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Section: Discussionmentioning

confidence: 99%

CT findings of the temporal bone in CHARGE syndrome: aspects of importance in cochlear implant surgery

Vesseur

Verbist

Westerlaan

et al. 2016

Eur Arch Otorhinolaryngol

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“…Koesling et al did not analyze the PSS incidence in relation to RCOM and assessed only axial images. Giessmann et al described a high (up to 65%) incidence of PSS in cochlear implant candidates with complete aplasia of the semicircular canals, which was higher than that observed in association with other inner ear malformations [14]. The mean diameter of PSS observed in our study (1.1 mm, range 0.7–3.4 mm) was smaller than that observed by Giessmann et al (3.1 mm, range 1.0–4.4 mm) and San Millán Ruiz et al (2.6 mm, range 2.0–3.0 mm) [13,14].…”

Section: Discussionmentioning

confidence: 99%

The Prevalence of Persistent Petrosquamosal Sinus and Other Temporal Bone Anatomical Variations on High-Resolution Temporal Bone Computed Tomography

et al. 2016

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BackgroundThe aim of the study was to determine the prevalence of petrosquamosal sinus (PSS) and other temporal bone (TB) anatomical variations in various patients using high-resolution computed tomography (CT).Material/MethodsWe reviewed clinical and consecutively obtained CT data for 276 TBs of 138 patients. The incidence of TB anatomical variations was compared among patients with radiological markers of chronic otitis media (RCOM) and non-RCOM.ResultsThe PSS incidence in our sample was 6.9%, and it was significantly higher in TBs with RCOM (14.6%). Selected anatomical variations of RCOM TBs were observed: lateral sigmoid sinus (14.5%), prominent sigmoid sinus (23.6%), PSS (14.6%), and high jugular bulb (17.3%). Lateral sigmoid sinus and prominent sigmoid sinus (p<0.01), high jugular bulb (p<0.05), and PSS (p<0.01) were observed more often in RCOM than in non-RCOM TBs.ConclusionsThe TB vascular and anatomical variations, including PSS, a high jugular bulb, and a laterally and prominent placed sigmoid sinus, were more often observed in TBs with RCOM. Presurgical imaging and CT-based navigation techniques for TB surgery can offer remarkable value for understanding the altered anatomy of this complex structure and can localize rare anatomical variations.

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“…Other consequences of emissary vein bleeds are epidural and subdural hematoma formations [6]. Venous anomalies of the internal jugular vein and sigmoid sinus are not uncommon in patients with otitis and labyrinthine dysplasia and may lead to enlargement of the emissary veins [7]. These patients are candidates for surgery and the description of these veins should be systematically included in temporal bone CT reports to provide awareness of the surgeon to avoid injuring these veins.…”

Section: A B Cmentioning

confidence: 99%

The prevalence and morphometric features of mastoid emissary vein on multidetector computed tomography

2016

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Persistent Petrosquamosal Sinus: High Incidence in Cases of Complete Aplasia of the Semicircular Canals

Cited by 26 publications

References 8 publications

CT findings of the temporal bone in CHARGE syndrome: aspects of importance in cochlear implant surgery

CT findings of the temporal bone in CHARGE syndrome: aspects of importance in cochlear implant surgery

The Prevalence of Persistent Petrosquamosal Sinus and Other Temporal Bone Anatomical Variations on High-Resolution Temporal Bone Computed Tomography

The prevalence and morphometric features of mastoid emissary vein on multidetector computed tomography

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