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.

On a chest X-ray, the sail sign is a radiologic sign that suggests left lower lobe collapse. [1] In children, however, a sail sign could be normal, reflecting the shadow of the thymus. [2] The thymic sail sign or spinnaker-sail sign is due to elevation of the thymic lobes in the setting of pneumomediastinum. [3]

The fat pad sign, also known as the sail sign, is a potential finding on elbow radiography which suggests a fracture of one or more bones at the elbow. It may indicate an occult fracture that is not directly visible.

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This has a classical appearance of a 'double left heart border,' or a 'sail sign' (orange). The second heart border ( curved arrow ) is due to the dense edge of the collapsed left lower lobe, which has been squashed into a triangle or sail shape.

There is a dense triangular opacity overlying the cardiac shadow with increased lucency of the left upper zone relative to the right upper zone. This is the "sail sign" of left lower lobe collapse with subsequent left upper lobe hyper-expansion. Red triangle highlights the …

Background: The sail sign is a well-known radiographic feature of the pediatric chest. This sign can be observed in an adult population as well, but for a different reason. Purpose: To investigate the sail sign appearing in adult chest radiography.

Oct 8, 2019 · Did you mean sail, sail t-sign, or sail s-sign? 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. The anterior fat pad is usually conceale...

Single lateral radiographs of the elbow reveals the classic sail sign. This is an invaluable soft tissue finding in cases of intra-articular injury of the elbow. Fat is normally present within the joint capsule of the elbow, but outside the synovium.

The posterior fat-pad is faintly visible and the anterior fat-pad is elevated and anteriorly displaced (Sail Sign). These findings indicate a fracture about the elbow that in an adult should be in the radial head and in a child usually means a supracondylar fracture.