What is the crus of the diaphragm?
A tendinous structure, the crus of diaphragm, extends from the diaphragm and attaches to the vertebral column. The right and the left crus (pl. crura) form a tether which helps in muscular contraction. They are called crus owing to their leg-shaped appearance (crus is Latin for leg).
Can you see diaphragm on CT scan?
CT allows an accurate depiction of the two crura, parts of the lumbar diaphragm that arise from the anterolateral surface of the first three right lumbar vertebrae and the first two left lumbar vertebrae. CT provides a precise image of the median and lateral arcuate ligaments, which are part of the lumbar section.
What is a Retrocrural mass?
The retrocrural space (RCS) is a small triangular area within the most inferior posterior mediastinum and is bordered by two diaphragmatic crura. This area includes the aorta, the azygos and hemiazygos veins, nerves, thoracic duct, and lymph nodes, which are called the retrocrural lymph nodes [5].
What is Retrocrural region?
The retrocrural space (RCS) is a small triangular region within the most inferior posterior mediastinum bordered by the two diaphrag- matic crura. There is a wide range of normal variants of the diaphragmatic crura and of structures within the RCS.
Whats the meaning of crus?
1 : the lower or hind limb especially between the knee and the ankle or tarsus : shank. 2 : any of various anatomical parts likened to a leg or to a pair of legs: as. a : either of the diverging proximal ends of the corpora cavernosa.
What is right crus?
The right crus, larger and longer than the left, arises from the anterior surfaces of the bodies and intervertebral fibrocartilages of the upper three lumbar vertebrae, while the left crus arises from the corresponding parts of the upper two only.
Where are the Retrocrural lymph nodes?
Retrocrural lymph nodes are located between the supradiaphragmatic space and the retroperitoneal space and they communicate with the posterior mediastinal nodes and para-aortic nodes in the upper abdomen 14.
What is the normal size of a para-aortic lymph node?
The upper limits of normal by location were as follows: retrocrural space, 6 mm; paracardiac, 8 mm; gastrohepatic ligament, 8 mm; upper paraaortic region, 9 mm; portacaval space, 10 mm; porta hepatis, 7 mm; and lower paraaortic region, 11 mm.
Where are Retrocrural nodes?
What is para aortic lymph nodes?
System. Lymphatic system. Anatomical terminology. The periaortic lymph nodes (also known as lumbar) are a group of lymph nodes that lie in front of the lumbar vertebrae near the aorta. These lymph nodes receive drainage from the gastrointestinal tract and the abdominal organs.
What is the meaning of the crus of the diaphragm?
Anatomical terminology. The crus of diaphragm (pl. crura), refers to one of two tendinous structures that extends below the diaphragm to the vertebral column. There is a right crus and a left crus, which together form a tether for muscular contraction.
Are there any normal variants of the diaphragmatic crura?
Multiplanar imaging modalities such as CT and magnetic resonance (MR) imaging have allowed evaluation of the RCS as part of routine examinations of the chest, abdomen, and spine. There is a wide range of normal variants of the diaphragmatic crura and of structures within the RCS.
Where does the diaphragm start on a chest scan?
On chest imaging, in particular chest radiography, an imaginary anteroposterior halfway line divides the diaphragm into two, forming the left and right hemidiaphragms . The muscular fibers of the diaphragm originate around the circumference of the inferior thorax and converge to a common insertion point of the central tendon.
What kind of imaging is used for diaphragmatic dysfunction?
Diaphragmatic disease usually manifests as elevation at chest radiography. Functional imaging with fluoroscopy (or ultrasonography or magnetic resonance imaging) is a simple and effective method of diagnosing diaphragmatic dysfunction, which can be classified as paralysis, weakness, or eventration.