0:00

So here's a classic case of sarcoidosis.

0:03

I'm sure most of you who have experience with chest imaging,

0:07

you guys probably looked at it and said, oh, okay.

0:09

I know exactly what this is. And so what are we seeing here?

0:12

We're seeing these clustered nodules.

0:14

So perilymphatic nodules, especially in the setting

0:16

of sarcoidosis, it likes to do this

0:18

where it involves certain portion

0:19

of lungs on the axial slice pretty severely.

0:21

And other portion of lungs, like not at all

0:23

as we can see there, but what tells us is paralympic.

0:26

Well, we see the subpleural nodularity.

0:28

So all this subpleural nodularity,

0:30

you're already pushing central lobular nodularity, very,

0:34

very low on your differential diagnosis.

0:35

And also this fi nodularity, which really just a subtype

0:38

of subpleural nodularity.

0:40

And if you look carefully, we see a lot of these nodular

0:43

and para bronchovascular tree

0:45

and some along the interocular septa like this.

0:48

And again, the fact that it's not entropic,

0:50

it clearly has a form to them.

0:51

They, they want to involve certain portion of the lungs

0:54

as opposed to random nodule,

0:57

which they're just gonna go everywhere and anywhere.

1:00

Um, this really draws us more

1:01

toward a perilymphatic pattern.

1:03

And this patient has underlying history of sarcoidosis.

1:07

And so I could carry the mi, but I'm not going to.

1:09

And then for those of you guys who like to look

1:14

for lymph nodes, we can look at this so clearly,

1:16

bilateral symmetric, calcified lymph nodes within the parit,

1:21

tracheal, SubCal,

1:22

and hilar regions, typical of sarcoidosis.