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.

16,833 results found
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Myxoid glioneuronal tumor

Myxoid glioneuronal tumor is a rare and low-grade tumor (WHO grade 1) that usually involve the septum pellucidum, corpus callosum, subcallosal area, periventricular white matter and septal nuclei 1.  Terminology The histologic features of this tumor are similar to dysembryoplastic neuroepithel...
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Extensor compartments of the wrist

The forearm extensor tendonspass under the extensor retinaculum at the level of the wrist. The ligament is divided into six extensor compartments, separated by fibrous septa passing to the bones of the forearm 2. Summary The compartments in order from radial to ulnar are: 1st compartment: ab...
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Carpal tunnel

The carpal tunnel is a fibro-osseous canal in the anterior (volar) wrist that acts as a passageway for structures between the anterior forearm and the hand. Gross anatomy Boundaries superficial border (roof): flexor retinaculum deep border (floor): carpal groove (formed by palmar aspect of c...
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Finger pulley injury

Finger pulley injuries can occur at any one of the five flexor tendon pulleys of the fingers, but most commonly affects the A2 pulley.  Clinical presentation These are overwhelmingly the result of a discrete trauma occurring with the hand in a finger grip position. They are most frequently see...
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Normal upper limb imaging examples

This page lists examples of normal imaging of the upper limb, divided by region and modality. Shoulder girdle plain radiograph sternoclavicular joint: example clavicle: example, example 2, example 3 bilateral clavicle: example 1 acromioclavicular joint example 1 example 2 shoulder exam...
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Imaging technology article structure

Articles about imaging technology require a different structure than articles about disease. Articles with this structure are generally assigned to the imaging technology section and may also be assigned to a specific system if appropriate. ======================================================...
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External calibration marker

An external calibration marker is a radiopaque object with a known size placed within the radiographic field to aid in orthopedic templating. It is important that they are not mistaken for a different type of foreign body. Clinical use The calibration marker, often a ball bearing or washer, ha...
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Medical abbreviations and acronyms (P)

This article contains a list of commonly used medical abbreviations and acronyms that start with the letter P and may be encountered in medicine and radiology (please keep the main list and any sublists in alphabetic order). A - B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - Q - R ...
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Medical abbreviations and acronyms (E)

This article contains a list of commonly used medical abbreviations and acronyms that start with the letter E and may be encountered in medicine and radiology (please keep both the main list and any sublists in alphabetic order). A - B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - Q...
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Penetrating abdominopelvic trauma

Penetrating abdominopelvic trauma usually occur in the setting of gunshot and stab injuries and is associated with high morbidity and mortality. CT is the modality of choice in imaging if stable enough prior to surgery. The most common injuries include small bowel, large bowel, liver, spleen and...
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Testicular cancer

Testicular cancers are the most common malignancy in men between the ages of 20 and 34 years. Epidemiology Testicular cancer is uncommon, accounting for less than 1% of all internal organ malignancies 2. The commonest histology of the tumor varies with the age of affected individuals. Over 90...
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Maxilla

The maxillae (or maxillary bones) are a pair of symmetrical bones joined at the midline, which form the middle third of the face. Each maxilla forms the floor of the nasal cavity and parts of its lateral wall and roof, the roof of the oral cavity, contains the maxillary sinus, and contributes mo...
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Mandible

The mandible is the single midline bone of the lower jaw. It consists of a curved, horizontal portion, the body, and two perpendicular portions, the rami, which unite with the ends of the body nearly at right angles (angle of the jaw). It articulates with both temporal bones at the mandibular fo...
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Teeth

The teeth (singular: tooth; collective term: dentition) can be both primary and secondary, with the eruption of permanent teeth occurring over a long period between the ages of 6 and 24 years. When an individual has a complete set of teeth, they are said to be dentate, if some are missing they a...
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Wallerian degeneration

Wallerian degeneration is the process of antegrade degeneration of the axons and their accompanying myelin sheaths following proximal axonal or neuronal cell body lesions. It may result following neuronal loss due to cerebral infarction, trauma, necrosis, focal demyelination, or hemorrhage.  Pa...
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Spinal epidural hematoma

Spinal epidural hematomas are rare and can result in severe morbidity if treatment is delayed and they are thus typically considered a surgical emergency.  Clinical presentation The patient's symptoms and signs will depend on the location of the hematoma, and the degree of spinal cord/cauda eq...
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External ear

The external ear (or outer ear) comprises the auricle (or pinna), the external auditory meatus, and the tympanic membrane ("eardrum"). The auricle concentrates and amplifies sound waves and funnels them through the outer acoustic pore into the external auditory meatus to the tympanic membrane. ...
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Chalk stick fracture

Chalk stick, also known as carrot stick fractures, are fractures of the fused spine, classically seen in ankylosing spondylitis. Terminology Some authors define the chalk stick fracture as a fracture through a Pagetoid long bone (see Paget disease) 3. Pathology They usually occur through the...
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Distal biceps tendon injury

Distal biceps tendon injuries refer to strains, partial and complete tears of the distal biceps tendon complex. Epidemiology Distal biceps tendon injuries are far less common than injuries to the proximal biceps tendon with an incidence of approximately 1.2/100000 1,2. They typically occur in ...
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Pleura

The pleura (plural: pleurae) is an exceedingly delicate serous membrane which is arranged in the form of a closed invaginated sac that encloses the lungs and lines the thoracic cavity. Gross anatomy The pleura divides into: visceral pleura which covers the surface of the lung and dips into th...

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