Items tagged “definition”

90 results found


Enlocated is a term popular among Australasian (Australia and New Zealand) radiologists and orthopaedic surgeons to describe a joint that is not dislocated.  It does not appear in the Oxford dictionary, nor is it widely used elsewhere in English-speaking countries. Most authors prefer the terms...


Sprain (latin distorsio) refers to injury of ligaments and capsules and should not be confused with strain which refers to injury to muscles and their tendons.  These terms should not be used interchangeably lest you become the butt of an orthopaedic surgeons derision.


Strain refers to injury of muscles and tendons and should not be confused wtih sprain which refers to injury to ligaments and capsules. One way to remember the distinction is that strain (with a T) is for tendons (which attach to muscle). These terms should not be used interchangably lest you b...


Diverticula are outpouchings of a hollow viscus and can be either true or false. Diverticulum is the singular form and diverticula is the correct Latin plural form. 'Diverticuli' and 'diverticulae' are erroneous and should not be used (cf. septum).  True diverticula contains all layers of the...

Myochosis coli

Myochosis coli is an uncommonly used term to denote the shortening and thickening of the colon seen in diverticulosis.  This is due to shortening of the taeniae coli and thickening of the circular muscular layer 1. History and etymology Myochosis coli is from the Ancient Greek for "heaped-up ...


A pseudocyst is an abnormal fluid-filled cavity which is not lined by epithelium.  It is this fact that distinguishes it pathologically from a cyst, which is lined by epithelium. Examples of pseudocysts are: pancreatic pseudocyst pulmonary pseudocyst pseudocysts of the germinal matrix


A cyst is an abnormal fluid-filled structure which is lined by epithelium; with one exception: lung cysts contain gas, not fluid. By contradistinction, a pseudocyst lacks an epithelial lining and instead has a vascular and fibrotic capsule. Cysts are extremely common and found in most organs. E...


Metaepiphysis is a portmanteau of metaphysis and epiphysis and refers to the combined region including the location of the growth plate. The term is therefore used to describe lesions that span both regions e.g. giant cell tumour of bone. See also diaphysis metaphysis epiphysis apophysis p...


Extra-axial is a descriptive term to denote lesions that are external to the brain parenchyma, in contrast to intra-axial which describes lesions within the brain substance.  Radiographic features Often it is trivially easy to distinguish an intra-axial from an extra-axial mass. In many cases,...


Intraventricular is a term used to denote lesions / processes that occur within either the ventricles of the brain or the ventricles of the heart.  In both cases, most lesions actually arise from the surrounding brain parenchyma / heart muscle and grow exophytically into the ventricles.  See a...


Hepatopetal denotes flow of blood towards the liver, which is the normal direction of blood flow through the portal vein. The term is typically used when discussing the portal vein or recanalised vein of the ligamentum teres in patients with suspected portal hypertension. It is the opposite of ...


Dysphagia refers to subjective awareness of difficulty or obstruction during swallowing. It is a relatively common and increasingly prevalent clinical problem. Odynophagia is the medial term for painful swallowing. Fluoroscopy is the mainstay of imaging assessment but manometry can help evaluat...


Bronchorrhoea is the expectoration of copious amounts of mucus from the lungs. It has been defined as production of more than 100 mL of mucus in 24 hours, which is more than is usually seen in chronic lung disease (e.g. chronic bronchitis typically produces 25 mL/24 hrs) 2. It may be a feature o...


Monostotic is typically used to refer to a condition that involves only one bone. Examples of conditions that can be monostotic include fibrous dysplasia and melorheostosis. See also monostotic polyostotic monomelic


Monomelic is typically used to refer to a condition that is confined to only one limb. Examples of conditions that can be monomelic include fibrous dysplasia and melorheostosis. See also monostotic polyostotic monomelic


Polyostotic is typically used to a condition that involves multiple bones. Examples of conditions that can be polyostotic include fibrous dysplasia and melorheostosis. See also monostotic polyostotic monomelic


A mucocele simply refers to accumulation and expansion of a structure by mucus. It occurs in a variety of locations which are discussed separately: paranasal sinus mucocele oral cavity e.g. ranula, mucous retention cysts mucocele of the appendix 1 mucocele of the gallbladder mucocele of the...


Bursae are small fluid-filled sacs lined by synovial membrane with an inner capillary layer of synovial fluid. It provides a cushion between bones and tendons and/or muscles around a joint. This helps to reduce friction between the bones and allows free movement. They may or may not communicate ...


An incidentaloma is a radiological neologism to denote a lesion found incidentally and of dubious clinical significance. Although it can refer to any incidental lesion (e.g. pituitary 3, thyroid 4), it is most often used to denote an incidental adrenal lesion, which is commonly an adrenal adenom...

Sprain vs strain

As petty as it sounds, medicine (and especially radiology) is all about precision in the terminology we use. Sprain and strain are often used interchangeably and often (randomly) incorrectly.  Sprain refers to injury of ligaments.  Strain refers to injury of muscles and tendons. A simple aide-...

Updating… Please wait.

Alert accept

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

Alert accept Thank you for updating your details.