The dural tail sign is seen on contrast material–enhanced magnetic resonance (MR) images as a thickening of the enhanced dura mater that resembles a tail extending from a mass.

It represent meningioma.

Coronal T1W spin-echo MRI of the brain with intravenous gadolinium enhancement shows dural tail (arrow) attached to a typical meningioma (arrowhead).

Sagittal T1W spin-echo MRI (415/20) of the upper thoracic spine demonstrates substantial dural tail (arrow) associated with spinal meningioma (arrowhead).

Reference: Rediology picture of the day l Radiology

Bankart lesion : A compression defect on the inferior articular surface of the humeral head due to impingement on the glenoid fossa during recurrent dislocations of the shoulder.

Radiographic Appearance : The Bankart’s lesion is usually seen as a small fracture or a osteophitic deposit probably due to micro fractures, there is often a corresponding Bankart’s fracture of the inferior margin of the glenoid fossa.

The lesion is visible on plain radiographs but a more detailed view can be obtained through multiplanar reconstruction using CT and MRI.

Labral Tear/Bankart Lesion seen at tips of red arrows

Fibrous Bankart lesion. An axial T1 weighted spin echo MR arthrographic image with fat saturation, at the level of the inferior glenoid labrum, demonstrates the avulsed and displaced labroligamentous complex from the anteroinferior aspect of the glenoid, with complete disruption of the scapular periosteum, which constitutes the fibrous Bankart lesion (arrow).

Reference : Imaging l eMedX.com l E-radiography.net

Hyperattenuating Crescent Sign : is a CT sign of acute or impending rupture of abdominal aortic aneurysm.

Finding : A well-defined peripheral crescent of increased attenuation within the thrombus of a large abdominal aortic aneurysm.

This finding is best appreciated on unenhanced CT images. It represents an internal dissection of blood into either the peripheral thrombus or the aneurysm wall, a process that either causes or results from a loss in the ability of the thrombus to protect the aneurysm from rupture. It is one of the earliest and most specific imaging manifestations of the rupture process

Reference : Radiographics l Radiology

Hyperdense MCA sign : It can be seen with acute thrombus formation. A hyperdense MCA sign is indicative of an impending large infarct and is of very poor prognosis. This is a very early CT finding of impending infarction. It should be noted, however, that there are other causes of a hyperdense MCA such as atherosclerotic calcifications.

Other early findings in an acute stroke include loss of the insular ribbon as well as hypodensity within the lentiform nucleus. Loss of the gray/white junction is also an early finding in acute infarction.

The region of infarction can be more accurately located by magnetic resonance imaging. Such findings include absence of the normal “flow void” as well as edema with loss of the gray/white junction.

Computed tomograph after ischaemic stroke, showing hyperdense middle cerebral artery sign.

Reference : ISPUB l sBMJ l Anne G. Osborn, Diagnostic Neuroradiology 1994

Positive rim sign : A important sign of posterior shoulder dislocation in routine AP view of the shoulder. It appears about 66% of all posterior shoulder dislocation patient.

Finding : distance between medial border of humeral head and anterior glenoid rim > 6 mm.

Reference : Gentili.net l Wolfgang F Dähnert, Radiology Review Manual 6th edition

Cotton wool appearance : A plain radiograph sign of late stage Paget Disease. Its appearance is due to thickened, disorganized trabeculae which lead to areas of sclerosis in a previously lucent area of bone – typically the skull.

Finding: Mixed lytic + blastic pattern of thickened calvarium.

Far advanced Page

Reference : Gentili.net l endotext.org l Wolfgang F Dähnert, Radiology Review Manual 6th edition

Draped aorta sign : An important CT imaging feature that may be seen in a contained rupture of an abdominal aortic aneurysm.

Findings : The posterior wall of the aorta either is not identifiable as distinct from adjacent structures or when it closely follows the contour of adjacent vertebral bodies.

Source image: The radiology assistant – Radiographic

Parvus tardus waveform has been described, where the presence of a small amplitude waveform with a prolonged systolic rise (slow upstroke) is considered to be indicative of a proximal stenosis such as a renal artery stenosis