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.
3,363 results found
Article
Ascending lumbar communicant vein
The ascending lumbar communicant vein is a communication between the left ascending lumbar vein and the left renal vein. Because of its retroperitoneal location, when dilated, it may be mistaken for a lymph node on non-contrast studies with thick collimation.
The image shows the left renal vein...
Article
Appendicular artery
The appendicular artery is a branch of the ileal or posterior cecal branch of the ileocolic artery, which is from the superior mesenteric artery.
It courses posteriorly to the terminal ileum in the free wall of the mesoappendix to supply the appendix.
Article
Forearm
The forearm is part of the upper limb below the (upper) arm and above the hand and wrist, comprising the radius and ulna bones. In the supinated anatomical position, the radius is lateral and the ulna is medial.
The elbow joint is superior and the wrist joint inferior. Forearm flexion and exten...
Article
Saphenous nerve
The saphenous nerve is the continuation of the deep division of the femoral nerve in the femoral triangle.
Gross anatomy
runs within the subsartorial canal, giving off an infrapatellar branch (it also contributes to the subsartorial nerve plexus)
curves behind sartorius, appearing behind the ...
Article
Placental shelf
A placental shelf refers to a ridge of placental tissue freely abutting the margin. It may represent part of a circumvallate placenta, although an early second-trimester placental shelf can be a common, benign and transient finding 1.
Placental shelves detected in early second-trimester are tho...
Article
Triangular space of cruciate ligaments
Triangular space of cruciate ligaments (TSC) is defined as the potential extrasynovial space between anterior and posterior cruciate ligaments of the knee joint.
Gross anatomy
Boundaries
anteriorly: anterior cruciate ligament
posteriorly: posterior cruciate ligament
inferiorly: tibial plate...
Article
Perilabral sulcus
The perilabral sulcus is a physiological space between the acetabular labrum and capsule of the hip joint, which inserts next to the base of the labrum and is therefore intra-articular.
Superiorly the capsule's attachment is displaced from the labrum by a few millimeters and thus the sulcus is ...
Article
Transverse ligament of the hip
The transverse ligament of the hip bridges the acetabular notch (located anteroinferiorly along the margin of the acetabulum) and joins the two ends of the acetabular labrum, thus forming a complete ring. Beneath it (through the acetabular foramen) pass nutrient vessels which enter the ligamentu...
Article
Vickers ligament
Vickers ligament is a ligamentous structure connecting the lunate bone and TFCC to the distal radius and is seen in the vast majority of patients with Madelung deformity 1.
Release of this thickened ligament may help in improving symptoms associated with Madelung deformity 2.
Article
Space of Poirier
The space of Poirier is an area of the palmar wrist capsule, between the radial and ulnar capsular ligaments. It lies in the interval between the capitate and lunate and has poor ligamentous support, hence is associated with perilunate dislocation/instability.
Article
Hepatobiliary system
The hepatobiliary system consists of the:
liver
biliary tree (both intra- and extra-hepatic)
gallbladder
The pancreas is included by some.
Article
Temporal pole
The temporal pole is an anatomical landmark that corresponds to the anterior end of the temporal lobe, lying in the middle cranial fossa.
It corresponds to Brodmann area 38 and has strong connections with the amygdala and orbital prefrontal cortex, and is sometimes recognized as a component of...
Article
Spence tail
Spence tail is the prolongation of upper outer quadrant of the breast in the axillary direction. It is also called the axillary tail, once it passes through the foramen of Langer, it pierces the axillary fascia. The duct system is seen to extend into the axilla.
If this direct continuity with t...
Article
Primary pulmonary lobule
Primary pulmonary lobule is not a term used with any frequency in HRCT, but is the reason the secondary pulmonary lobule has its name.
A primary pulmonary lobule is defined as the lung unit distal to the respiratory bronchioles. It is significantly smaller than an acinus, and is composed of alv...
Article
Ducts of the salivary glands
The ducts of the salivary glands allow the passage of salivary juice from the glands to the oral cavity:
parotid duct (Stenson duct): connects the parotid gland to the buccal mucosa, adjacent to maxillary second molar
submandibular duct (Wharton duct): connects the submandibular gland to the f...
Article
Loop-to-loop colon
The loop-to-loop colon describes an abnormal colonic course associated with the absence of the left kidney from the renal fossa.
The transverse colon extends to the lateral margin of the abdominal wall and the descending colon courses medially to fill the renal fossa, resulting in a "looped" c...
Article
Chromaffin cells
Chromaffin cells are neuroendocrine cells found predominantly in the medulla of the adrenal gland. They are also found in other ganglia of the sympathetic nervous system and are derived from the embryonic neural crest.
Embryology
They arise in the fifth week of fetal development when neuroblas...
Article
Suspensory ligament of the axilla
The suspensory ligament of the axilla is the inferior extension of the clavipectoral fascia on each side of the thorax.
Gross anatomy
The suspensory ligament of the axilla originates from the inferior border of pectoralis minor, where the 'leaflets' of the clavipectoral fascia have fused again...
Article
Sigmoid kidney
A sigmoid kidney is an uncommon variant of the horseshoe kidney. Whereas the typical horseshoe kidney is fused only at the lower poles, in a sigmoid kidney both the upper and the lower poles are fused 1.
Article
Foramen of Rouviere
The foramen of Rouviere is a rarely seen space in the shoulder joint capsule between middle and inferior glenohumeral ligaments and it may communicate with the subcoracoid recess (inferior subscapularis recess). It should not be confused with an acquired defect.
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