Articles

Cases

Courses

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.

Create new article

3,363 results found

Lesser sac

The lesser sac or omental bursa is a potential peritoneal space within the abdomen, part of the peritoneal cavity. Gross anatomy The lesser sac may be conceptualized as the space posterior to the lesser omentum, between the posterior wall of the stomach and the surface of the peritoneum that ...

Vertebral body endplate

Vertebral body endplates are anatomically discrete structures that form the interface between the vertebral bodies and the adjacent intervertebral discs. They are constituted centrally by a cartilaginous layer and peripherally by a bone ring apophysis. The cartilaginous layer is related to the n...

Gallbladder

The gallbladder is a pear-shaped musculomembranous sac located along the undersurface of the liver. It functions to accumulate and concentrate bile between meals. Gross anatomy The normal adult gallbladder measures from 7-10 cm in length and 3-4 cm in transverse diameter 6. It communicates wit...

Left gastric artery

The left gastric artery (LGA) is the smallest and first branch of the celiac artery. Gross anatomy The left gastric artery passes superiorly over the left crus of the diaphragm, approaching the esophageal opening of the diaphragm, giving off an esophageal branch to the distal esophagus, then...

Sprengel deformity

Sprengel deformity, or congenital elevation of the scapula, is a complex deformity of the shoulder and is the most common congenital shoulder abnormality. An initial diagnosis can often be made on radiographs, but CT or MRI is often necessary to evaluate the details of the abnormality. Epidemio...

Right-sided aortic arch

Right-sided aortic arch is a type of aortic arch variant characterized by the aortic arch coursing to the right of the trachea. Different configurations can be found based on the supra-aortic branching patterns, with the two most common patterns being the right-sided aortic arch with mirror imag...

Coronary sinus

The coronary sinus is the largest cardiac venous structure. It returns the majority of the blood supply for the left ventricle to the right atrium. Gross anatomy The coronary sinus courses along the posterior wall of the left atrium into the left atrioventricular groove. It normally drains int...

Periaqueductal grey matter

Periaqueductal grey (PAG) matter is a column of grey matter that surrounds the cerebral aqueduct of Sylvius in the midbrain. The periaqueductal grey matter extends from the superior border of the midbrain (which forms the posterior aspect of the floor of the third ventricle), inferiorly towards ...

Dentate nucleus

The dentate nucleus is the largest and most lateral of the cerebellar nuclei, located medially within each cerebellar hemisphere, just posterolateral to the fourth ventricle 1. It is part of the triangle of Guillain and Mollaret, connected to the contralateral red nucleus via the superior cereb...

Stomach

The stomach is a muscular organ that lies between the esophagus and duodenum in the upper abdomen. It lies on the left side of the abdominal cavity caudal to the diaphragm at the level of T10. Gross anatomy The stomach ("normal" empty volume 45 mL) is divided into distinct regions: cardia: th...

Nasolacrimal duct

The nasolacrimal duct (NLD) is the terminal part of the nasolacrimal apparatus. Gross anatomy The nasolacrimal duct is the inferior continuation of the lacrimal sac and is ~17 mm in length in total. The duct runs in the bony nasolacrimal canal. There are two parts to the nasolacrimal duct: in...

Unicornuate uterus

A unicornuate uterus or unicornis unicollis is a type of Müllerian duct anomaly (class II). It is also known as a banana-shaped uterus 6,7, because of the shape the single horn assumes, and it usually drains into a single fallopian tube. Epidemiology This type can account for ~10% (range 6-13%...

Cranial meninges

The cranial meninges (singular: meninx) surround the brain and are made up of four layers (from outermost to innermost): dura mater arachnoid mater subarachnoid lymphatic-like membrane pia mater Terminology The dura mater can also be known as the pachymeninx. The arachnoid mater and pia ma...

Superior medullary velum

The superior (or anterior) medullary velum is a thin layer of tissue that is suspended between the superior cerebellar peduncles forming the roof of the fourth ventricle along with the inferior medullary velum. It is enclosed by pia mater dorsally and ependyma ventrally. The lingula of the vermi...

Abducens nerve

The abducens nerve is the sixth cranial nerve (CN VI). It is a motor nerve responsible for abduction of the eye (TA: nervus abducens or nervus cranialis VI). It courses from the abducens nucleus, located in the dorsal pons, up to the cavernous sinus, via a long cisternal segment that is prone to...

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...

Ligamentum teres hepatis (abdomen)

The ligamentum teres hepatis or round ligament is the fibrous cord formed by the obliterated fetal umbilical vein that runs in the free edge of the falciform ligament from the umbilicus into the left lobe of the liver.

Caudate nucleus

Caudate nuclei are paired nuclei which along with the globus pallidus and putamen are referred to as the corpus striatum, and collectively make up the basal ganglia. The caudate nuclei have both motor and behavioral functions, in particular maintaining body and limb posture, as well as controlli...

Velum interpositum

The velum interpositum is a small membrane containing a potential space just above and anterior to the pineal gland which can become enlarged to form a cavum veli interpositi. Gross anatomy The velum interpositum is formed by an invagination of pia mater forming a triangular membrane the apex...

Tongue

The tongue is a complex, principally muscular structure that extends from the oral cavity to the oropharynx. It has important roles in speech, swallowing and taste. Gross anatomy The tongue has a tip, dorsum, inferior surface and root. The tongue is made of a midline lingual septum and hyoglo...

Filtered (2)Done (clear)

+Systems

×Article Sections

×Sort By

ADVERTISEMENT: Supporters see fewer/no ads

Updating… Please wait.

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

Thank you for updating your details.