If there was significant atelectasis of the right upper lobe, which way would the horizontal fissure shift?

Question

Quizplus · Accepted Answer

The horizontal fissure separates the right upper lobe from the middle lobe. If there is significant atelectasis of the right upper lobe, this would cause the lung to collapse and become smaller in size. As a result, the horizontal fissure would shift upwards or cephalad due to the shrunken upper lobe.

If There Was Significant Atelectasis of the Right Upper Lobe