Articles
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16,689 results found
Article
Gastric volvulus
Gastric volvulus is a specific type of volvulus that occurs when the stomach twists on its mesentery. It should be at least 180° and cause bowel obstruction to be called gastric volvulus. Merely gastric rotation on its root is not considered gastric volvulus.
Epidemiology
Organo-axial volvulus...
Article
Warthin tumor
Warthin tumors, also known as lymphomatous papillary cystadenomas, are benign, sharply demarcated salivary gland tumors, almost exclusively encountered in the parotid gland. They are of lymphoid origin and may be bilateral or multifocal in up to 20% of cases and are the most common neoplastic ca...
Article
Celiacomesenteric trunk
The celiacomesenteric trunk (CMT) represents an uncommon vascular anatomical variant where both the celiac trunk and the superior mesenteric artery (SMA) have a common origin from the abdominal aorta as a single trunk. Its frequency has been reported to occur in about 1.5% of the population 1,2....
Article
Skull base angle
The skull base angle (of Boogard) allows the diagnosis of platybasia and basilar kyphosis. Several different techniques may be used on sagittal images from MRI or CT.
Traditionally, basal angle measurements were based on plain skull images. With the advent and generalization of MR imaging, it h...
Article
Vestibular schwannoma
Vestibular schwannomas, also known as acoustic neuromas, are relatively common tumors that arise from the vestibulocochlear nerve (CN VIII) and represent ~80% of cerebellopontine angle (CPA) masses. Bilateral vestibular schwannomas are strongly suggestive of neurofibromatosis type 2 (NF2).
On i...
Article
Dural tail sign
The dural tail sign occurs as a result of thickening and enhancement of the dura and is most often seen adjacent to a meningioma.
Initially, the sign was felt to be pathognomonic of meningiomas, however, it has become increasingly noted to be present in many other conditions, although without t...
Article
Acromial types
The shape of the acromion had been initially divided into three types (which was known as the Bigliani classification) 3, to which a fourth has been added 2. They are used as a standardized way of describing the acromion, as well as predicting to a degree the incidence of impingement.
Classifi...
Article
Acute necrotizing encephalopathy
Acute necrotizing encephalopathy, also referred as acute necrotizing encephalopathy of childhood (ANEC), is a rare type of encephalopathy characterized by multiple bilateral brain lesions, mainly involving the thalami, but also the putamina, internal and external capsules, cerebellar white matte...
Article
Baastrup disease
Baastrup disease or syndrome (also referred to as kissing spines) is a cause of low back pain characterized by interspinous bursitis and other degenerative changes of the bones and soft tissues where adjacent spinous processes in the lumbar spine rub against each other.
Epidemiology
It tends t...
Article
Torricelli-Bernoulli sign
The Torricelli-Bernoulli sign denotes non-dependent air trapped in a necrotic ulcer in a gastrointestinal tumor seen on axial CT or MRI. Occasionally, a vertical stream of bubbles can be seen issuing from the orifice of the ulcer.
Terminology
Torricelli's theorem gives the relation of the velo...
Article
Boston criteria 2.0 for cerebral amyloid angiopathy
The Boston criteria 2.0 were proposed in 2022 in order to better include leptomeningeal and white matter characteristics into the diagnoses of probable and possible cerebral amyloid angiopathy (CAA) 1. They consist of combined clinical, imaging and pathological parameters, and are based upon the...
Article
Supracondylar humeral fracture
Supracondylar humeral fractures, often simply referred to as supracondylar fractures, are a classic pediatric injury which requires vigilance as imaging findings can be subtle.
Epidemiology
Simple supracondylar fractures are typically seen in younger children, and are uncommon in adults; 90% a...
Article
Primary pigmented nodular adrenal dysplasia
Primary pigmented nodular adrenal dysplasia (PPNAD) is a rare benign adrenal condition characterized by ACTH-independent autonomous hypersecretion of cortisol, leading to Cushing syndrome.
Epidemiology
PPNAD is often familial. Patients typically present as children or young adults, and there ...
Article
Atrial septal defect
Atrial septal defect (ASD) is the second most common congenital heart defect after ventricular septal defects (VSDs). Diagnosis is often delayed until adulthood when complications arise such as atrial arrhythmias or pulmonary hypertension. The radiologist may be the first to suggest the diagnosi...
Article
Nasopharyngeal carcinoma
Nasopharyngeal carcinomas (NPC) are the most common primary malignancy of the nasopharynx. They are of squamous cell origin. Some types are strongly associated with the Epstein-Barr virus (EBV).
Epidemiology
Nasopharyngeal carcinoma accounts for ~70% of all primary malignancies of the nasophar...
Article
Ortner syndrome
Ortner syndrome, also known as cardiovocal syndrome, is characterized by hoarse voice resulting from left recurrent laryngeal nerve palsy secondary to a cardiovascular disorder.
Pathology
Left recurrent laryngeal nerve palsy in this condition is due to traction or compression of the nerve betw...
Article
AAST liver injury scale
The AAST (American Association for the Surgery of Trauma) liver injury scale, most recently revised in 2018, is the most widely used liver injury grading system 3.
The 2018 update incorporates "vascular injury" (i.e. pseudoaneurysm, arteriovenous fistula) into the imaging criteria for visceral ...
Article
Pleural effusion volume (ultrasound)
Measurement of a pleural effusion volume with point-of-care ultrasonography may be a useful tool for intensivists and is an active area of research in critical care 7.
In controlled settings ultrasound may detect constitutive pleural fluid, can reliably detect effusions >20 mL in clinical setti...
Article
Vocal cord paralysis
Vocal cord paralysis/paresis (VCP), also known as vocal fold paralysis/paresis, refers to the impaired mobility of the true vocal cord or fold due to neurologic dysfunction.
Clinical presentation
Unilateral vocal cord paralysis usually presents with dysphonia (hoarseness), characterized as a b...
Article
Behçet disease (thoracic manifestations)
Thoracic manifestations in Behçet disease have a wide spectrum of appearances.
Epidemiology
The reported prevalence of thoracic involvement of Behçet disease is thought to range around 1-8% 2.
Radiographic features
CT
Chest HRCT can demonstrate the entire spectrum of thoracic manifestation...