0:00

This is another case of a benign tumor that occurs

0:04

in the parotid gland and that is a schwannoma.

0:08

This in this case,

0:09

what one sees is a lesion that is going down the

0:14

7th cranial nerve from the stylomastoid

0:17

foramen into the parotid gland.

0:19

Let's take a look on the T1-weighted Sagittal

0:22

scan. Here's the front of the face,

0:24

here the back of the head.

0:25

Here we see a lobulated mass which exits the

0:30

temporal bone and comes out through the

0:32

stylomastoid foramen and enters the parotid gland.

0:37

Here we have the stylomastoid foramen on T2

0:39

weighted imaging and we see that this lesion is

0:43

intermediate in signal intensity and it's

0:46

heading again towards the parotid gland.

0:49

Here is again the stylomastoid foramen.

0:51

Here is our tumor.

0:53

Notice that it's enhancing quite avidly

0:57

and it's coming to the parotid gland here,

1:01

which is also enhancing. On the coronal scan,

1:04

we see that the mass has exited the descending

1:08

portion of the 7th cranial nerve,

1:11

comes into the stylomastoid foramen

1:14

and then enters the parotid gland.

1:19

What's curious about this case is that we can also

1:23

see a lesion which is enhancing in the internal

1:26

auditory canal, which is a vestibular schwannoma.

1:31

So with these multiple schwannomas we are

1:35

considering neurofibromatosis type two,

1:37

the so-called Mismi syndrome with multiple cranial

1:40

schwannomas, meningiomas, and appendomas.

1:44

And this is an example of a schwannoma of the 7th

1:49

cranial nerve growing into the parotid gland.

Schwannoma of the Intraparotid Facial Nerve

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