The lungs are hyperinflated with relatively flat diaphragms - a sign of pulmonary emphysema. There is a dense triangular opacity overlying the cardiac shadow with increased lucency of the left upper zone relative to the right upper zone.

May 3, 2024 · triangular opacity in the posteromedial aspect of the left lung (retrocardiac sail sign) left lower zone opacification (usually medially) with the apex pointing towards the left hilum edge of the collapsed lung may create a 'double cardiac contour'

Feb 11, 2025 · The thymic sail sign represents a triangular-shaped inferior margin of the normal thymus seen on a neonatal frontal chest radiograph. It is more commonly seen on the right side, but can also be bilateral.

Feb 11, 2025 · The retrocardiac sail sign represents the characteristic and highly specific appearance of left lower lobe collapse on a frontal chest x-ray. Radiographic appearance The collapsed, medially displaced left lower lobe is represented by a triangular area of increased density with sharp margins, superimposed on the heart shadow which resembles the ...

Feb 11, 2025 · The sail sign on an elbow radiograph, also known as the anterior fat pad sign, describes the elevation of the anterior fat pad to create a silhouette similar to a billowing spinnaker sail from a boat. It indicates the presence of an elbow joint effusion.

A nice example of a retrocardiac sail sign indicative of a left lower lobe collapse. Note the loss of the left hemidiaphragm medially and preservation of the cardiac contour. A lateral CXR would help confirm the diagnosis but unfortunately was not available.

Sep 20, 2024 · invisible oblique fissure on lateral CXR if profound collapse rotates the fissure posteromedially (non-tangential to the x-ray beam) 2. inferior displacement of the right hilum. If there is an obstructing lesion in the bronchus intermedius, there will be signs of both RML and RLL collapse. CT

Oct 11, 2020 · There are numerous sail signs in radiology, where a normal structure is displaced or a pathology creates the appearance of a sail: elbow sail sign: the raised anterior fat pad on an elbow radiograph; thymic sail sign: normal thymus on a pediatric chest radiograph; spinnaker-sail sign (angel wing sign): thymus outlined in pneumomediastinum

Oct 19, 2021 · Thymic wave sign refers to the indentation of the normal thymus in young children by the ribs, resulting in a wavy border on chest radiograph. There are at least 3 described signs relating to a normal thymus in infants; thymic sail sign , thymic notch sign and thymic wave sign .

Oct 8, 2019 · The sail sign on an elbow radiograph, also known as the anterior fat pad sign, describes the elevation of the anterior fat pad to create a silhouette similar to a billowing spinnaker sail from a boat.