Articles
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16,919 results
Article
Osteonecrosis of the femoral head
Osteonecrosis of the femoral head, previously known as avascular necrosis (AVN) of the hip, is the most common site for osteonecrosis, presumably due to a combination of precarious blood supply and high loading when standing.
Idiopathic osteonecrosis of the femoral head epiphysis in children (...
Article
Osteonecrosis
Osteonecrosis (plural: osteonecroses) is a generic term referring to the ischemic death of the constituents of bone. It has a wide variety of causes and can affect nearly any bone in the body. Most sites of involvement have an eponym associated with osteonecrosis of that area (see list below), a...
Article
Osteomyelitis
Osteomyelitis (plural: osteomyelitides) refers to infection, typically bacterial, of bone involving the medullary cavity 21.
This article is focused on acute bacterial osteomyelitis. Other types of osteomyelitis are discussed separately:
chronic osteomyelitis
fungal osteomyelitis
skeletal sy...
Article
Charcot joint
Charcot joint, also known as a neuropathic joint or Charcot (neuro/osteo)arthropathy, refers to a progressive degenerative/destructive joint disorder in patients with abnormal pain sensation and proprioception.
Epidemiology
In modern Western societies by far the most common cause of Charcot jo...
Article
Varicocele embolization
Varicocele embolization is a minimally invasive method of treating varicoceles by embolizing the testicular vein (internal spermatic veins).
Indications
symptomatic varicocele
infertility/subfertility
failed surgical ligation
Contraindications
Relative contraindications include:
intraveno...
Article
Varicocele
Varicocele is the dilatation of the pampiniform plexus of veins, a network of many small veins found in the male spermatic cord. It is the most frequently encountered mass of the spermatic cord.
Epidemiology
The estimated incidence is at ~15% of the general male population and ~40% of subferti...
Article
Lung atelectasis
Lung atelectasis (plural: atelectases) refers to the collapse or incomplete expansion of pulmonary parenchyma.
Terminology
Atelectasis may be used synonymously with collapse, but some authors reserve the term “atelectasis” for partial collapse, not inclusive of total atelectasis of the affect...
Article
Bronchiectasis
Bronchiectasis (plural: bronchiectases) is defined as an irreversible abnormal dilatation of the bronchial tree. It has a variety of underlying causes, with a common etiology of chronic inflammation. High-resolution CT is the most accurate modality for diagnosis.
Epidemiology
As there are many...
Article
Pyonephrosis
Pyonephrosis is a term given to an infection of the kidney with pus in the upper collecting system which can progress to obstruction.
Pyonephrosis may be suspected when the clinical symptoms of fever and flank pain are combined with the radiologic evidence of urinary tract obstruction 1. Debris...
Article
Choroid plexus infarct
Choroid plexus infarct is an uncommon location of ischemic stroke that results from ischemia of the choroid plexus, supplied by the medial posterior choroidal artery, which is a branch from the posterior cerebral artery (PCA).
Clinical presentation
Isolated choroid plexus infarction is rare an...
Article
Posterior choroidal artery infarct
Posterior choroidal artery infarct is a rare isolated ischemic stroke syndrome due to occlusion of the posterior choroidal artery. It usually coexists with posterior cerebral artery, and often superior cerebellar artery, infarction.
Clinical presentation
When infarction is limited to to the la...
Article
Medial posterior choroidal artery
The medial posterior choroidal artery is a small branch (often multiple - 40% of hemispheres) usually arising from the P2 segment of the posterior cerebral artery (PCA). It may also arise from one of the PCA branches, e.g. parieto-occiptal, calcarine, splenial artery.
It ascends deep to the res...
Article
Cholecystectomy
Cholecystectomies are one of the most common surgical procedures performed. Evidence of a cholecystectomy is often seen on imaging procedures with surgical clips in the gallbladder fossa and radiologists should be aware of possible complications.
Indications
cholelithiasis
cholecystitis
gal...
Article
Cytotoxic lesions of the corpus callosum (CLOCCs)
Cytotoxic lesions of the corpus callosum (CLOCCs) represent a collection of disparate conditions that can cause signal change in the corpus callosum, usually involving the splenium.
Terminology
The term cytotoxic lesions of the corpus callosum (CLOCCs) has been proposed 12 as a more precise d...
Article
Bardet-Biedl syndrome
Bardet-Biedl syndrome (BBS), previously known as the Laurence-Moon-Bardet-Biedl syndrome (LMBBS), is a rare autosomal recessive hereditary condition.
Clinical presentation
The clinical spectrum includes:
retinal anomalies: similar to that of retinitis pigmentosa
intellectual disability
rena...
Article
Embryonal tumor with multilayered rosettes
Embryonal tumors with multilayered rosettes (ETMR) are rare small round blue cell tumor of the central nervous system. They are one of the most aggressive brain tumors usually encountered in children and are WHO grade 4 tumors.
Terminology
Previously embryonal tumors with multilayered rosette...
Article
Oropharyngeal isthmus
The oropharyngeal isthmus, a.k.a. isthmus of fauces, is the relative constriction of the anterior oropharynx that borders the oral cavity. The isthmus is sometimes described as the passage that transitions between the oral cavity and pharynx, but strictly speaking, it is part of the oropharynx.
...
Article
Lobar intracerebral hemorrhage
Lobar intracerebral hemorrhage is a subtype of intracerebral hemorrhage defined by their location in the peripheral cerebral hemispheres. Compared to deep intracerebral hemorrhages (involving the deep grey nuclei or brainstem), lobar hemorrhages are less likely to be related to hypertension and ...
Article
Rosette-forming glioneuronal tumors
Rosette-forming glioneuronal tumors (RGNTs) are rare, usually midline, tumors that involve the fourth ventricle and/or aqueduct of Sylvius.
Although relatively well-circumscribed on MRI and clinically indolent, they often invade surrounding tissues, involving the cerebellum, pons and even the ...
Article
Neurographics (journal)
Neurographics is a quarterly review journal publication by the American Society of Neuroradiology and was first published in 2011.
History
In 2011, at the behest of Mauricio Castillo, Editor-in-Chief of American Journal of Neuroradiology (AJNR), a review journal, Neurographics, was published. ...