Items tagged “diagram”
9 results found
Article
Couinaud classification of hepatic segments
The Couinaud classification (French eponym: pronounced kwee-NO) is currently the most widely used system to describe functional liver anatomy. It is the preferred anatomy classification system as it divides the liver into eight independent functional units (termed segments) rather than relying o...
Article
Medical illustrations and diagrams
High-quality medical illustrations and diagrams form an important part of Radiopaedia.org.
Attribution
All illustrations should have appropriate attribution in the case findings and only be uploaded to Radiopaedia under the following circumstances:
original illustrations created by you (you...
Article
Torus tubarius
Torus tubarius (plural: tori tubarii) or cushion of the auditory canal is a mucosal elevation in the lateral aspect of the nasopharynx, formed by the underlying pharyngeal end of the cartilaginous portion of the Eustachian tube. The opening of the Eustachian tube is anterior to the torus tobariu...
Article
Ishikawa classification of venous involvement by pancreatic ductal adenocarcinoma
Ishikawa classification system describes the degree of involvement of adjacent portal vein and superior mesenteric vein by pancreatic ductal adenocarcinoma based on the caliber of the vein:
type I: normal
type II: smooth shift/displacement with normal caliber
type III: unilateral narrowing...
Article
Transition zone (nerve)
The transition zone of a nerve, also known as the Obersteiner-Redlich zone, describes a region of a few millimeters where the myelin sheath changes from a central to peripheral type as enveloping glial cells are replaced by Schwann cells.
Gross anatomy
Transition zone locations 1:
CN V: 4 mm ...
Article
Bunny waveform sign
Bunny waveform sign refers to the biphasic morphology of the pulsed wave Doppler spectral waveform in the vertebral artery in early (occult/latent or partial) subclavian steal phenomenon (sometimes called a "presteal" state, before it progresses to frank flow reversal). There is a sharp decelera...
Article
Lymph nodes
The lymph nodes (commonly shortened to nodes, and known as nodus lymphoideus in TA 4) collectively form one of the secondary lymphoid organs.
Gross anatomy
Macroscopically, a normal lymph node is a small ellipsoid structure, approximately 0.1 to 2.5 cm in maximal length 2,3. Nodes often posses...
Article
Deep posterior tibiotalar ligament
The deep posterior tibiotalar ligament (DPTTL) is one of the two deep components and the strongest part of the deltoid ligament 1,2.
Gross anatomy
The deep posterior tibiotalar ligament is covered by the superficial posterior tibiotalar and tibiocalcaneal ligaments. It is a broad and thick lig...
Article
Cystic vein
The cystic veins (TA: venae cysticae) are one of two venous drainage pathways of the gallbladder. They subsequently drain into the portal vein.
Gross anatomy
The cystic veins begin as venules running over the surface of the fundus and body of the gallbladder merging proximate to the neck of th...