Accessory fissure

Most commonly seen accessory fissure in Lungs on CXR ?
a. Azygous fissure
b. Superior accessory fissure
c. Inferior accessory fissure
d. Left sided horizontal fissure

ANSWER:

Ans : C
Azygous fissure is mostly right sided - seen in 0.4% CXR
Superior - 5%
Inferior - 5 - 8%
Left horizontal - rare