Oct 10, 2023 · The horizontal fissure arises from the right oblique fissure and follows the 4 th intercostal space from the sternum until it meets the oblique fissure as it crosses the right 5 th rib 1. The horizontal fissure is highly variable and can be incomplete or absent in some patients.

Oct 11, 2023 · The oblique fissures (also called the major fissures or greater fissures) are bilateral structures in both lungs separating the lung lobes. The superior part of the right oblique fissure separates the right upper lobe from the right lower lobe and the inferior part separates the right middle lobe from the right lower lobe.

The major (or oblique) fissures cannot be identified on a frontal chest X-ray. This is because they are oriented obliquely en-face. A lateral view can demonstrate if a lung abnormality is anterior or posterior to the major fissures.

The right lung has two fissures, oblique fissure and horizontal fissure, which separate the lung into three lobes - upper, middle, and lower. Each lobe has its own visceral pleural covering. Only the horizontal fissure is commonly seen on a frontal chest X-ray.

Jan 2, 2025 · The right lung has two distinct fissures: the oblique fissure and the horizontal fissure. The oblique fissure divides the inferior lobe from the superior and middle lobes, while the horizontal fissure separates the superior lobe from the middle lobe.

The horizontal fissure, which is seen only in the right lung, begins at the oblique fissure, courses along the costal surface, cuts the anterior border, appears on the mediastinal surface, and ends at the hilum . Frontal chest radiography can detect horizontal fissures in 60% of cases.

The normal pulmonary fissures include right oblique fissure, left oblique fissure and right horizontal fissure while the accessory pulmonary fissures include superior accessory fissure, inferior accessory fissure and azygos fissure.

In present study, common finding is complete oblique and horizontal fissures in right lung and incomplete oblique fissure in left lung. Accessory fissure varied from notch to prominent fissure often separating an accessory lobe.

The horizontal fissure, present in the right lung, divides the upper and middle lobes. This fissure begins from the right 4 th costal cartilage at the level of right sternal border, runs horizontally towards right side to meet the oblique fissure.1

Jan 1, 2018 · The lung fissures are divisions from the surface to the hila of lung tissue which divide it into lobes. They include the: The oblique fissure divides the left lung into superior and inferior lobes. On the right, the oblique fissure demarcates along a similar route, but the presence of the horizontal fissure results in the following arrangement: