Chest XRs and CTs

Question 1

Pattern of bronchopneumonia on CXR

Answer 1

Tree-in-bud

Question 2

Bulging fissure sign

Answer 2

Suggests lobar pneumonia

Question 3

Bat-wing pattern suggests (4)

Answer 3

Pulmonary edema
Viral pneumonia
Hypersensitivity pneumonitis
Inhalation injury

Question 4

Reverse bat-wing pattern suggests

Answer 4

Fibrosis

Sarcoidosis

Question 5

Why does sarcoidosis show a reverse bat-wing pattern?

Answer 5

Because it “follows lymphatics”

Question 6

Why does HP show a bat-wing pattern?

Answer 6

Because it “follows the airways”

Question 7

Laminated, diffuse nodule patterns suggest:

Answer 7

Old granulomas

Question 8

Popcorn pattern nodule suggests:

Answer 8

Hamartoma

Question 9

What malignancy looks like pneumonia on CXR?

Answer 9

Mucinous adenocarcinoma

Question 10

“Ground-glass” on CT suggests

Answer 10

Adenocarcinoma in situ

Question 11

“Bubble lucencies” on CT suggests

Answer 11

Invasive adenocarcinoma

Question 12

Which pulmonary malignancy is known to cavitate?

Answer 12

Squamous cell carcinoma

Question 13

What type of CXR is done when a tension PTX is suspected?

Answer 13

Expiratory CXR