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.
More than 200 results
Article
Renal transplant torsion
Renal transplant torsion is a very rare complication of renal transplant, occurring mostly in intraperitoneal transplants because of the increased mobility compared to extraperitoneal transplants, which are less mobile.
Clinical presentation
Non-specific clinical symptoms such as nausea, abdo...
Article
Using and attributing images from Radiopaedia
Using images from Radiopaedia in your presentations is not only OK but is actively encouraged. Radiopaedia is all about sharing our knowledge and cases and by so doing, makes it easier to teach and to learn from each other.
To download an image, just click the download icon (little cloud with ...
Article
Metastatic glioblastoma
Metastatic glioblastoma is a rare progression of glioblastoma, with an incidence of 0.4-0.5% of all glioblastoma cases. The locations can be extraneural, such as leptomeninges and dural venous sinuses, or both extraneural and extracranial, such as solid organs and lymph nodes.
Epidemiology
In ...
Article
F-18 fluorodeoxyglucose
F-18 fluorodeoxyglucose (FDG) is the most common PET radiotracer.
Structure
The radiopharmaceutical consists of the fluorine-18 radionuclide substituting the hydroxyl group at the C-2 position of glucose. The IUPAC chemical name is 2-deoxy-2-[F-18]fluoroglucose.
Production
F-18 fluoride ion ...
Article
Marfan syndrome
Marfan syndrome is a multisystem connective tissue disease caused by a defect in the protein fibrillin 1, encoded by the FBN1 gene. Cardiovascular involvement with aortic root dilatation and dissection is the most feared complication of the disease.
Epidemiology
The estimated prevalence is aro...
Article
Articles
Articles form the encyclopedic component of Radiopaedia.org and are collaborative efforts to create atomic reference articles for anything related to the practice of radiology. Unlike a textbook, journal publication or a written encyclopedia, Radiopaedia.org articles allow you and other users to...
Article
Copy editor
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The copy editor reviews newly submitted cases to ensure they adhere to Radiopaedia’s style guidelines ...
Article
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Article
Aberrant internal carotid artery
Aberrant internal carotid artery is a variant of the internal carotid artery and represents a collateral pathway resulting from involution of the normal cervical portion (first embryonic segment) of the internal carotid artery 5.
Gross anatomy
There is consequent enlargement of the usually sma...
Article
Pediatric liver tumor staging (PRETEXT grouping system)
The PRETEXT system proposed by the International Childhood Liver Tumors Strategy Group (previously called Société Internationale d’Oncologie Pédiatrique - Epithelial Liver Tumor Study Group - SIOPEL) aims for staging and risk stratification of liver tumors at diagnosis.
It is used to describe ...
Article
Saccular cerebral aneurysm
Saccular cerebral aneurysms, also known as berry aneurysms, are intracranial aneurysms with a characteristic rounded shape. They account for the vast majority of intracranial aneurysms and are the most common cause of non-traumatic subarachnoid hemorrhage.
Terminology
Those larger than 25 mm i...
Article
Occipital sinus
The occipital sinus is one of the smallest dural venous sinuses and lies, as its name suggests, on the inner surface of the occipital bone. Tributaries from the marginal sinus of the foramen magnum, some of which connect with both the sigmoid sinus and vertebral venous plexus, coalesce to pass i...
Article
Stroke protocol (CT)
A CT stroke protocol, often referred to as a code stroke CT, has become a fairly widespread and standardized approach to imaging patients presenting with acute neurological symptoms that may represent cerebral infarction or cerebral hemorrhage (together grouped under the vague term stroke).
In...
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Gastroschisis
Gastroschisis refers to an extra-abdominal herniation (evisceration) of fetal or neonatal bowel loops (and occasionally portions of the stomach, liver, and/or bladder12) into the amniotic cavity through a para-umbilical anterior abdominal wall defect.
Epidemiology
The estimated incidence is ar...
Article
Infantile hepatic hemangioma
Infantile hepatic hemangiomas (IHH) are liver lesions composed of large endothelial-lined vascular channels seen in fetuses and neonates. They are not to be confused with hepatic epithelioid hemangioendothelioma, which occurs in older patients.
Terminology
These benign tumors were previously r...
Article
Epipericardial fat necrosis
Epipericardial fat necrosis (also sometimes purely categorized as pericardial fat necrosis or epicardial fat necrosis) is a rare self-limiting cause of acute pleuritic pain in an otherwise healthy individual, without fever or cough. It occurs external to the pericardium.
Clinical presentation
...
Article
Choroid plexus papilloma
Choroid plexus papillomas are an uncommon, benign (WHO grade 1) neuroepithelial intraventricular tumor, which can occur in both the pediatric (more common) and adult population.
On imaging, these tumors are usually identified in the fourth ventricle in adults and in the lateral ventricles in t...
Article
Primary uveal malignant melanoma
Malignant uveal melanomas, also referred to as choroidal melanomas, are the most common primary tumor of the adult eye 3.
Epidemiology
Malignant melanoma of the uvea is the most common primary intraocular malignancy and is predominantly seen in the White population 5. The incidence of these t...
Article
Thoracic splanchnic nerves
The thoracic splanchnic nerves are three paired autonomic nerves that provide sympathetic innervation of the abdominopelvic viscera and vessels. They contain efferent and afferent fibers.
Gross anatomy
Three pairs of thoracic splanchnic nerves arise from the T5 to T12 sympathetic ganglia.
Gre...
Article
Contrast agent pooling sign
The contrast agent pooling sign refers to dependent contrast agent pooling in systemic veins. The original paper found a high incidence on contrast CTs performed on emergency department patients who had a cardiac arrest within the following hour 1. Pooling is promoted by high injection rates and...
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