Dec 6, 2022 · The bird's beak sign of the esophagus is used to refer to the tapering of the inferior esophagus in achalasia. The same appearance is also referred to as the rat's tail sign. The appearance, although classically occurring in primary achalasia, can also occur in pseudoachalasia due to a gastric tumor involving the gastro-esophageal junction. See ...

Mar 4, 2025 · bird beak sign or rat tail sign. esophageal dilatation. tram track appearance: central longitudinal lucency bounded by barium on both sides 8. incomplete lower esophageal sphincter relaxation that is not coordinated with esophageal contraction

Mar 22, 2025 · northern exposure sign Fluoroscopy Although now uncommonly performed, a water-soluble contrast enema exquisitely demonstrates this condition, with the appearances described as the beak sign (or bird beak sign).

Rapid sequence fluoroscopic images from a barium esophagogram reveal a persistently dilated esophagus with an air-fluid level at the lower esophagus and classic "bird-beaking" at the gastroesophageal (GE) junction, despite normal primary peristaltic waves.

Jun 15, 2024 · Animal and animal produce inspired signs may sound a little silly, but the radiology literature is replete with such signs, some more fanciful than others.

Mar 2, 2023 · Beak sign in pyloric stenosis is one of the fluoroscopic (barium meal) findings that is useful in the diagnosis of congenital hypertrophic pyloric stenosis.

There is dilatation and stasis in esophagus with tapering at the lower esophageal sphincter and narrowing at the gastro-esophageal junction with characteristic appearances of bird beak sign or rat-tail sign.

Feb 18, 2025 · The atrophy of the midbrain results in a profile of the brainstem (in the sagittal plane) in which the preserved pons forms the body of the bird, and the atrophic midbrain the head, with beak extending anteriorly towards the optic chiasm. Midbrain atrophy is best confirmed with reduction in the midbrain to pons ratio.

Feb 23, 2024 · The beak sign of arterial dissection is the acute angle formed at the edge of the false lumen in aortic dissection in axial cross-section. It is formed by the borders of the outer aortic wall and the intimal flap, and may be partially thrombosed (blunted beak).

Sep 18, 2024 · This bird beak sign, originally applied to the appearance of sigmoid volvulus on conventional radiographs, can also be appreciated on axial CT images of the loop-type cecal volvulus. A specific CT sign for volvulus is the whirl sign , which has been described in volvulus of the midgut, cecum, and sigmoid colon 3 .