Items tagged “snippet”

55 results found
Article

Supraorbital cells

Supraorbital air cells are an anatomical variant of the paranasal sinuses. They consist of cells originating from the anterior ethmoid air cells extending posteriorly and superiorly over the orbit from the frontal recess. They may mimic septated frontal sinuses as their posterior wall is the sku...
Article

Ionizing radiation

Ionizing radiation is the term given to forms of radiation that are energetic enough to displace orbiting electrons from the atoms in the absorbing medium, thus forming positive ions.  Forms of ionizing radiation Indirect Indirect ionizing radiation involves uncharged particles. X-rays and ga...
Article

Thoracoepigastric vein

The thoracoepigastric vein provides a communication between the superficial epigastric vein and the lateral thoracic vein as it ascends superficially on anterolateral chest and abdominal wall. It, therefore, drains into both the superior vena cava via the axillary vein and the inferior vena cava...
Article

Left perihepatic space

The left perihepatic space (also known as the left subhepatic space) is a potential space located between the stomach and the visceral surface of left lobe of the liver. Gross anatomy The left perihepatic space can be further subdivided into anterior and posterior spaces. It is a subcompartmen...
Article

Hip (Von Rosen view)

The Von Rosen view also known as the abduction-internal rotation view (AIR view) is a radiographic projection of the hip that demonstrates the relationship between the femoral head and the acetabulum. The von Rosen view is used in the diagnosis of developmental dysplasia of the hip in pediatric...
Article

Laryngeal vestibule

The laryngeal vestibule is the part of the laryngeal cavity lying between the laryngeal inlet and vocal folds. It is found within the supraglottis. It has a wedge-shaped cross-section, its base lying anteriorly, with its apex tapering posteriorly.  Relations anterior: tubercle of the epiglotti...
Article

Killian dehiscence

The Killian dehiscence is a triangular shaped area of weakness in the muscular wall of the pharynx, between the transverse and oblique bundles of the inferior pharyngeal constrictor 1. Gross anatomy It is located in the posterior wall of the laryngopharynx, slightly above the origin of the eso...
Article

Fast spin echo

Fast or turbo spin echo (FSE/TSE) is an adaptation of conventional spin-echo (SE) acquisition technique designed to reduce imaging time. It has largely supplanted the original spin-echo technique due to vastly improved imaging speed. Basic spin echo sequence In a basic SE sequence, a single ec...
Article

Endometrium

The endometrium refers to the inner lining of the uterine lumen, composed of endometrial glands surrounded by loose highly cellular connective tissue. Gross anatomy Layers In women of reproductive age, the endometrium is composed of two layers: stratum basale (basal layer): describes the de...
Article

Laryngeal ventricle

The laryngeal ventricle is a slitlike, mucosa-lined, space located between the true and false vocal cords. It is often seen on lateral radiographs of the neck as an air-filled space between the true and false vocal cords. It should not be confused with the laryngeal vestibule. See also laryng...
Article

Laryngeal saccule

The laryngeal saccule is a mucosa-lined sac or pouch that arises from the anterior aspect of the roof of the laryngeal ventricle. It is most prominent in newborn but involutes during childhood. Relations medial: false vocal cords lateral: thyroid cartilage Related pathology Dilatation of th...
Article

Right marginal artery

The right marginal artery, also known as the right intermediate atrial branch, supplies the surrounding right atrial tissues 1,2 and, in 10-15% of cases, provides the main arterial supply to the sinus node 3,4. Terminology It also sometimes known as a the acute marginal artery or margo acutus ...
Article

Tympanosquamosal suture

The tympanosquamosal suture or fissure separates the tympanic part of the temporal bone from the squamous part. It is parallel and anterior to the bony external auditory meatus and medially continuous with the petrotympanic fissure and petrosquamous fissure.
Article

Mastoid canaliculus

The mastoid canaliculus (also known as Arnold's canal) arises from the pars vascularis of the foramen jugulare and runs to the mastoid segment of the facial nerve canal and contains Arnold nerve (auricular branch of vagus nerve).  History and etymology Arnold's canal, and its corresponding ner...
Article

Pancreatico-pleural fistula

Pancreatico-pleural fistulas are a rare complication of acute or chronic pancreatitis whereby enzymatic pancreatic fluid, either from a pancreatic pseudocyst or directly from a disrupted duct, dissects into the pleural cavity. Pancreaticopleural fistulas may also develop in the setting of trauma...
Article

Triangular ligament

The triangular ligaments grouped with the ulnar collateral ligament and meniscal homologue, comprising the ulnar-sided components of the triangular fibrocartilage complex (TFCC). The triangular ligament attaches triangular fibrocartilage to the ulnar tip and fovea. The triangular ligament is co...
Article

Accessory anterior inferior tibiofibular ligament

The accessory anterior inferior tibiofibular ligament (AITFL), also known as Bassett's ligament, can be a cause of anterior ankle impingement syndrome. The accessory AITFL is described as a separate thickened distal fascial of the AITFL with a far distal extension on the lateral malleolus. 
Article

Anterior fontanelle

The anterior or frontal fontanelle (or fontanel) is the diamond-shaped soft membranous gap at the junction of the coronal and sagittal sutures. It persists until approximately 18-24 months after birth, after which it is known as the bregma. The precise timing of the anterior fontanelle closure i...
Article

Mastoid fontanelle

The mastoid or posterolateral fontanelles (or fontanels) are paired bilateral soft membranous gaps at the junction of the parietomastoid, occipitomastoid, and lambdoid sutures. Each mastoid fontanelle persists until the second year of life, after which it is known as the asterion. It can be used...
Article

Venetian blind appearance (uterus)

The Venetian blind (a.k.a. rain shower 2) appearance is a sonographic finding that is typically associated with adenomyosis but can also occur in uterine fibroids. The Venetian-blind artifact associated with adenomyosis is typically "thin" whereas when associated with uterine fibroids, there are...

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