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Double facial nerve trunk emerged from the stylomastoid foramen and petrotympanic fissure: a case report.

Kilic C, Kirici Y, Kocaoglu M - J. Korean Med. Sci. (2010)

Bottom Line: These anatomic peculiarities were described, photographed and illustrated.Finally, magnetic resonance imaging was performed by using 1.5T scanner to this cadaver.Surgeons who are willing to operate on this area should be aware of the possible anatomical variations of the facial nerve trunk.

View Article: PubMed Central - PubMed

Affiliation: Department of Anatomy, Faculty of Medicine, Gulhane Military Medical Academy, Ankara, Turkey.

ABSTRACT
There are several studies concerning branches of the facial nerve, but we encountered less information about the trunk of the facial nerve in the literature. During the routine dissection of a 65-yr-old Caucasian male cadaver, double facial nerve trunk emerged from the stylomastoid foramen and petrotympanic fissure were encountered. Because of an extremely rare variation, we presented this case report. In addition this cadaver had two buccal plexuses. These plexuses and other branches were formed to structures like to polygon. These anatomic peculiarities were described, photographed and illustrated. Finally, magnetic resonance imaging was performed by using 1.5T scanner to this cadaver. The facial nerve trunk can be damaged during surgical procedures of the parotid gland tumours and submandibular region. Surgeons who are willing to operate on this area should be aware of the possible anatomical variations of the facial nerve trunk.

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An oblique sagittal T1-weighted magnetic resonance image shows temporofacial and cervicofacial rami of the facial nerve emerging through the petrotympanic fissure and stylomastoid foramen, respectively. The temporofacial (Tr) and cervicofacial (Cr) rami of the facial nerve.
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Figure 3: An oblique sagittal T1-weighted magnetic resonance image shows temporofacial and cervicofacial rami of the facial nerve emerging through the petrotympanic fissure and stylomastoid foramen, respectively. The temporofacial (Tr) and cervicofacial (Cr) rami of the facial nerve.

Mentions: In the present cadaver, difference with the exit point of the facial nerve was observed. In this specimen, a nerve exiting from petrotympanic fissure was present. In this side, although cervicofacial ramus of the facial nerve exited from the stylomastoid foramen, temporofacial ramus of the facial nerve exited from petrotympanic fissure (Fig. 1). This specimen had two buccal plexuses. The buccal branch dividing from temporal branch of temporofacial ramus and first buccal branch dividing from cervicofacial ramus formed to first buccal plexus. The buccal branch dividing from zygomatic branch of temporofacial ramus and second buccal branch dividing from cervicofacial ramus formed to second buccal plexus (Fig. 2). These two buccal plexuses and other branches formed to structures like to polygon (Fig. 2). The temporofacial ramus exiting from petrotympanic fissure was seen on magnetic resonance image (Fig. 3).


Double facial nerve trunk emerged from the stylomastoid foramen and petrotympanic fissure: a case report.

Kilic C, Kirici Y, Kocaoglu M - J. Korean Med. Sci. (2010)

An oblique sagittal T1-weighted magnetic resonance image shows temporofacial and cervicofacial rami of the facial nerve emerging through the petrotympanic fissure and stylomastoid foramen, respectively. The temporofacial (Tr) and cervicofacial (Cr) rami of the facial nerve.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2908796&req=5

Figure 3: An oblique sagittal T1-weighted magnetic resonance image shows temporofacial and cervicofacial rami of the facial nerve emerging through the petrotympanic fissure and stylomastoid foramen, respectively. The temporofacial (Tr) and cervicofacial (Cr) rami of the facial nerve.
Mentions: In the present cadaver, difference with the exit point of the facial nerve was observed. In this specimen, a nerve exiting from petrotympanic fissure was present. In this side, although cervicofacial ramus of the facial nerve exited from the stylomastoid foramen, temporofacial ramus of the facial nerve exited from petrotympanic fissure (Fig. 1). This specimen had two buccal plexuses. The buccal branch dividing from temporal branch of temporofacial ramus and first buccal branch dividing from cervicofacial ramus formed to first buccal plexus. The buccal branch dividing from zygomatic branch of temporofacial ramus and second buccal branch dividing from cervicofacial ramus formed to second buccal plexus (Fig. 2). These two buccal plexuses and other branches formed to structures like to polygon (Fig. 2). The temporofacial ramus exiting from petrotympanic fissure was seen on magnetic resonance image (Fig. 3).

Bottom Line: These anatomic peculiarities were described, photographed and illustrated.Finally, magnetic resonance imaging was performed by using 1.5T scanner to this cadaver.Surgeons who are willing to operate on this area should be aware of the possible anatomical variations of the facial nerve trunk.

View Article: PubMed Central - PubMed

Affiliation: Department of Anatomy, Faculty of Medicine, Gulhane Military Medical Academy, Ankara, Turkey.

ABSTRACT
There are several studies concerning branches of the facial nerve, but we encountered less information about the trunk of the facial nerve in the literature. During the routine dissection of a 65-yr-old Caucasian male cadaver, double facial nerve trunk emerged from the stylomastoid foramen and petrotympanic fissure were encountered. Because of an extremely rare variation, we presented this case report. In addition this cadaver had two buccal plexuses. These plexuses and other branches were formed to structures like to polygon. These anatomic peculiarities were described, photographed and illustrated. Finally, magnetic resonance imaging was performed by using 1.5T scanner to this cadaver. The facial nerve trunk can be damaged during surgical procedures of the parotid gland tumours and submandibular region. Surgeons who are willing to operate on this area should be aware of the possible anatomical variations of the facial nerve trunk.

Show MeSH
Related in: MedlinePlus