A direct blow to the globe can dramatically increase intraorbital pressure, fracturing the delicate orbital floor. On standard occipitomental (OM) radiographs, this injury may only be visible through…
The vascular pedicle width is defined on chest radiography as the horizontal distance from the left subclavian artery origin to the superior vena cava at the level where it crosses the right mainstem…
Vasculitis is classified by the calibre of vessel predominantly affected. Imaging modality selection should follow this classification directly. Large vessel disease (aorta and major branches) is…
The classic radiologic hallmark of Pantothenate Kinase-Associated Neuropathy (PKAN) is the "Eye of the Tiger" sign . Seen on T2-weighted brain MRI , it presents as symmetrical bilateral hypointensity…
While a large pericardial effusion might present as a " Giant Water Bottle Heart " on a frontal radiograph, the lateral view may demonstrate the "Oreo Cookie Sign" . This sign is formed by a central…
Both a normal corpus luteum and an ectopic pregnancy can demonstrate the vascular "Ring of Fire" sign on ultrasound. These features favor an ectopic pregnancy will move separately from the ovary when…
Two classic signs for Celiac Sprue malabsorption are: Moulage Sign (tube of wax) - In severe cases, the jejunum can appear as a tube with no visible folds, resembling a smooth "cast" or mold due to…
The classic Rigler's Triad for gallstone ileus consists of pneumobilia a mechanical bowel obstruction an ectopic gallstone Rigler's Sign is the visualisation of both the inner and outer surfaces of…
Cholesterol granulomas , the most common primary petrous apex lesion, are bright on both T1 and T2 — a reflection of methemoglobin and cholesterol from recurrent hemorrhage. This distinguishes them…
For patients with HCC who are not surgical candidates, embolization alone provides only palliative relief. However, adding ablation can make the treatment potentially curative; ablation alone is…
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