Septal lines in lung | Radiology Reference Article - Radiopaedia

| Feature | | Kerley B Lines | Kerley C Lines | |--------|-------------------|-------------------|-------------------| | Appearance | Long, thin, non-branching lines | Short, horizontal lines | Fine reticular (net-like) opacities | | Length | 2–6 cm | 1–2 cm | Variable | | Location | Central upper zones, radiating from hila | Peripheral lower zones, especially costophrenic angles | Lower zones (less specific) | | Orientation | Radiating toward hila | Perpendicular to pleural surface | No defined orientation | | Anatomical correlate | Thickened axial interstitium (large interlobular septa deep in lung) | Thickened peripheral interlobular septa at lung bases | Intersecting septal lines (rarely used clinically) | | Clinical note | Less common; may persist in chronic states | Most reliable sign of interstitial edema | Non-specific; often just represents early B lines |

Well-defined, fine, non-branching linear opacities, measuring 1–2 cm in length and <1 mm thick . They are oriented perpendicular to the pleura and typically seen in the lower zones , particularly at the lung bases and costophrenic angles .

To understand Kerley lines, you must understand lung anatomy.

This is the textbook cause. When the left ventricle fails, it cannot pump blood out efficiently, causing back-pressure into the left atrium and pulmonary veins.



Kerley Lines X Ray Instant

Septal lines in lung | Radiology Reference Article - Radiopaedia

| Feature | | Kerley B Lines | Kerley C Lines | |--------|-------------------|-------------------|-------------------| | Appearance | Long, thin, non-branching lines | Short, horizontal lines | Fine reticular (net-like) opacities | | Length | 2–6 cm | 1–2 cm | Variable | | Location | Central upper zones, radiating from hila | Peripheral lower zones, especially costophrenic angles | Lower zones (less specific) | | Orientation | Radiating toward hila | Perpendicular to pleural surface | No defined orientation | | Anatomical correlate | Thickened axial interstitium (large interlobular septa deep in lung) | Thickened peripheral interlobular septa at lung bases | Intersecting septal lines (rarely used clinically) | | Clinical note | Less common; may persist in chronic states | Most reliable sign of interstitial edema | Non-specific; often just represents early B lines | kerley lines x ray

Well-defined, fine, non-branching linear opacities, measuring 1–2 cm in length and <1 mm thick . They are oriented perpendicular to the pleura and typically seen in the lower zones , particularly at the lung bases and costophrenic angles . Septal lines in lung | Radiology Reference Article

To understand Kerley lines, you must understand lung anatomy. This is the textbook cause

This is the textbook cause. When the left ventricle fails, it cannot pump blood out efficiently, causing back-pressure into the left atrium and pulmonary veins.