What are interlobular septa?

The interlobular septa (singular: interlobular septum) are located between the secondary pulmonary lobules and are continuous with both the subpleural interstitium (peripheral connective tissue) and the peribronchovascular interstitium (axial connective tissue) as well as the more delicate intralobular septa.

What is interlobular septal thickening in lungs?

Diffuse interlobular septal thickening (DIST) is a pattern of lung disease found on high-resolution thoracic CT scanning (HRCT or CTPA). It represents pathology in the periphery of the pulmonary lobules (ie, the interlobular septa).

What is smooth interlobular septal thickening?

Thickening of the interlobular septa is a common and easily recognizable finding at high-resolution computed tomography (HRCT; 1-2 mm collimation high-spatial-frequency reconstruction algorithm). Interlobular septal thickening at HRCT can be smooth, nodular, or irregular in contour.

What is septal in lungs?

Septal lines, also known as Kerley lines, are seen when the interlobular septa in the pulmonary interstitium become prominent. This may be because of lymphatic engorgement or edema of the connective tissues of the interlobular septa. They usually occur when pulmonary capillary wedge pressure reaches 20-25 mmHg.

What is the function of interlobular septum?

The intralobular septa (sing: septum) are delicate strands of connective tissue separating adjacent pulmonary acini and primary pulmonary lobules. They are continuous with the interlobular septa which surround and define the secondary pulmonary lobules.

Is there a septum in the lungs?

The alveolar septum separates adjacent alveoli in lung tissue. The minimal components of an alveolar septum consist of the basement membranes of alveolar-lining epithelium (mostly type I pneumocytes) and capillary endothelium.

What is Interlobular and Intralobular septal thickening?

Intralobular septal thickening is a form of interstitial thickening and should be distinguished from interlobular septal thickening. It is often seen as fine linear or reticular thickening. It has been described with several conditions of variable etiology which include. sarcoidosis 2. asbestosis 1.

What is Septae?

sep·ta (-tə) A thin partition or membrane that divides two cavities or soft masses of tissue in an organism: the nasal septum; the atrial septum of the heart.

What is in the Interalveolar septum?

The alveolar wall, called the interalveolar septum, is common to two adjacent alveoli. It contains a dense network of capillaries, the smallest of the blood vessels, and a skeleton of connective tissue fibres.