It is usually seen in patients with pulmonary fibrosis, but is uncommonly the sole abnormal finding.Increased reticulation, traction bronchiectasis, or honeycombing are often visible.

• 它通常可见于肺纤维化，但是很少单独出现，常合并粗网格状影、牵拉性支气管扩张和蜂窝肺。