Articles

Articles are a collaborative effort to provide a single canonical page on all topics relevant to the practice of radiology. As such, articles are written and continuously improved upon by countless contributing members. Our dedicated editors oversee each edit for accuracy and style. Find out more about articles.

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...

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.