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.
3,368 results found
Article
Nigrosomes
Nigrosomes are small clusters of dopaminergic cells within the substantia nigra that exhibit calbindin D28K negativity on immunohistochemistry. Five nigrosomes measuring up to a few millimeters in size have been described with the largest labeled as nigrosome-1 1.
Nigrosome-1
Nigrosome-1 withi...
Article
Glenoid bare spot
The glenoid bare spot, or glenoid bare area, is a small central or slightly eccentric area of the inferior glenoid fossa, where the articular cartilage is markedly thinner or completely absent 2. It is considered to be a normal aging-related phenomenon 1.
Epidemiology
The glenoid bare spot can...
Article
Adductor canal
The adductor canal (also known as Hunter's canal or the subsartorial canal) is a muscular tunnel in the anterior compartment of the thigh. It serves to transmit several important neurovascular structures from the femoral triangle through the thigh into the popliteal fossa.
Gross anatomy
Locati...
Article
Spermatic cord
The spermatic cord (TA: funiculus spermaticus) is the tubular structure that suspends the testes and epididymis in the scrotum from the abdominal cavity.
Gross anatomy
Course
The spermatic cord arises at the deep inguinal ring, passes through the inguinal canal and exits at the superficial in...
Article
Persistent primitive trigeminal artery
Persistent primitive trigeminal artery (PPTA) is the most common type of the four persistent carotid-vertebrobasilar anastomoses. It is present in 0.1-0.6% of cerebral angiograms and is usually unilateral.
In utero, the trigeminal artery supplies the basilar artery before the development of the...
Article
Thoracic aorta
The thoracic aorta is the most superior division of the aorta and is divided into three sections:
ascending aorta
aortic arch
descending aorta
The thoracic aorta begins at the aortic valve, located obliquely just to the left of the midline at the level of the third intercostal space. It term...
Article
Conjoined nerve root
Conjoined nerve roots are the most common nerve root developmental anomaly of the cauda equina, being twice as common as two roots in the same foramen, the next most common anomaly.
Epidemiology
The incidence in cadaveric studies is ~10% (range 8-14%) 2, and in one prospective MRI study was 6%...
Article
Renal fascia
The renal fascia is a dense, elastic connective tissue sheath that envelops each kidney and adrenal gland together with a layer of surrounding perirenal fat forming the perirenal space.
It is a multi-laminated structure which is fused posteromedially with the muscular fasciae of the psoas and q...
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