0:00

Let's take a look at a different patient,

0:03

who has a similar diagnosis of olfactory

0:05

neuroblastoma, and similar imaging features.

0:09

Once again, involvement predominantly of the

0:11

ethmoid sinus in this specific case, but we

0:14

see intracranially the posterior cyst we see on

0:17

the post-gadolinium enhanced scan, the posterior cyst,

0:21

and we note that there is absence of infiltration

0:24

of the orbit, which is a good thing.

0:27

On the coronal plane,

0:29

we see posteriorly the cyst,

0:32

but anteriorly the involvement here.

0:33

There's vasogenic edema in the left

0:37

frontal lobe on this very large tumor.

0:40

Remember that this is a malignancy, and in

0:43

this situation, again, they would try to

0:45

extract the tumor via an endoscopic approach.

0:49

They can even go intracranially via the

0:51

endoscopic approach, but this one might be

0:54

converted to a craniofacial resection because

0:56

there is so much involvement superiorly.

0:59

Let's just take a quick look on the post-

1:01

gadolinium coronal scan, and you can see the

1:05

amount of tumor that is intracranial, that's

1:09

going to require a craniofacial resection,

1:11

including the tumor crossing the midline.

1:15

I wanna show the FLAIR scan if I can, to show

1:18

you the degree of the edema in the left frontal

1:21

lobe associated with this very large mass.

1:25

So another example of a stereotypical

1:28

feature of the olfactory neuroblastoma.

1:31

Remember also, on CT scan, these

1:33

usually have some element of speckled

1:35

calcification associated with the tumor.

Olfactory Neuroblastoma

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0:00

Let's take a look at a different patient,

0:03

who has a similar diagnosis of olfactory

0:05

neuroblastoma, and similar imaging features.

0:09

Once again, involvement predominantly of the

0:11

ethmoid sinus in this specific case, but we

0:14

see intracranially the posterior cyst we see on

0:17

the post-gadolinium enhanced scan, the posterior cyst,

0:21

and we note that there is absence of infiltration

0:24

of the orbit, which is a good thing.

0:27

On the coronal plane,

0:29

we see posteriorly the cyst,

0:32

but anteriorly the involvement here.

0:33

There's vasogenic edema in the left

0:37

frontal lobe on this very large tumor.

0:40

Remember that this is a malignancy, and in

0:43

this situation, again, they would try to

0:45

extract the tumor via an endoscopic approach.

0:49

They can even go intracranially via the

0:51

endoscopic approach, but this one might be

0:54

converted to a craniofacial resection because

0:56

there is so much involvement superiorly.

0:59

Let's just take a quick look on the post-

1:01

gadolinium coronal scan, and you can see the

1:05

amount of tumor that is intracranial, that's

1:09

going to require a craniofacial resection,

1:11

including the tumor crossing the midline.

1:15

I wanna show the FLAIR scan if I can, to show

1:18

you the degree of the edema in the left frontal

1:21

lobe associated with this very large mass.

1:25

So another example of a stereotypical

1:28

feature of the olfactory neuroblastoma.

1:31

Remember also, on CT scan, these

1:33

usually have some element of speckled

1:35

calcification associated with the tumor.

Report

Faculty

David M Yousem, MD, MBA

Professor of Radiology, Vice Chairman and Associate Dean

Johns Hopkins University

Mahla Radmard, MD

Postdoctoral Research Fellow

Johns Hopkins University School of Medicine

Paranasal Sinus

Paranasal Sinus Anatomy and Imaging Protocol

Paranasal Sinus

Inflammatory Disease

Paranasal Sinus

Neoplastic Disease

Paranasal Sinus

Miscellaneous Lesions of the Paranasal Sinus

Olfactory Neuroblastoma