Image Based Question-62253

The CT Scan of Chest Shows the Following . Probable Diagnosis ?

A. Blastomycosis

B. Bronchogenic carcinoma

C. Invasive aspergillosis

D. Bronchiectasis

Correct Answer » D Explanation

Signet ring sign

• The signet ring sign is a CT finding seen in patients with Bronchiectasis
• The ring of soft-tissue attenuation represents the wall of the dilated bronchus seen on a cross-sectional CT scan, whereas the low-attenuating circle of air represents air within the dilated bronchus.
• The circle of soft-tissue attenuation abutting the ring represents a cross-sectional image of the pulmonary artery that lies adjacent to the dilated bronchus.