Items tagged “variant”

420 results found
Case

Cardiac bronchus

 Diagnosis certain
Assoc Prof Frank Gaillard
Published 13 Feb 2010
80% complete
CT
Article

Incomplete hippocampal inversion

Incomplete hippocampal inversion describes the situation where the normal inversion of the hippocampus fails to happen during development. Terminology Incomplete hippocampal inversion is the most correct description of this finding. Hippocampal malrotation is a term used by some authors 1 alth...
Article

Cardiac bronchus

A cardiac bronchus (or sometimes termed accessory cardiac bronchus (ACB)) is a rare anatomic variant of the tracheobronchial tree, arising from the medial aspect of the bronchus intermedius. Epidemiology This anomaly is rare and is reported in ~0.3% (range 0.09-0.5%) of individuals 3-5. There ...
Article

Aberrant left pulmonary artery

Aberrant left pulmonary artery, also known as pulmonary sling, represents an anatomical variant characterized by the left pulmonary artery arising from the right pulmonary artery and passing above the right main bronchus and in between the trachea and esophagus to reach the left lung. It may lea...
Article

Aberrant left pulmonary artery

Aberrant left pulmonary artery, also known as pulmonary sling, represents an anatomical variant characterized by the left pulmonary artery arising from the right pulmonary artery and passing above the right main bronchus and in between the trachea and esophagus to reach the left lung. It may lea...
Article

Synovial plicae (knee)

Synovial plicae are folds of synovium, thought to represent embryologic remnants. They are common, present in ~90% of arthroscopies 3.  They have been implicated in anterior knee pain and possibly in chondromalacia patellae although their role remains controversial 1,3.  Gross anatomy Some pl...
Article

Ectopic thyroid

An ectopic thyroid gland is one which is located in a location other than the normal position anterior to the laryngeal cartilages. Variant anatomy During embryological development, the thyroid gland migrates down from the foramen cecum at the posterior aspect of the tongue to its permanent lo...
Article

Ectopic thyroid

An ectopic thyroid gland is one which is located in a location other than the normal position anterior to the laryngeal cartilages. Variant anatomy During embryological development, the thyroid gland migrates down from the foramen cecum at the posterior aspect of the tongue to its permanent lo...
Article

Lunate morphology

Several classification systems exist for the lunate morphology 1, 2. Classification The lunate classification proposed by Viegas et al. is arguably the most relevant 3:  type I lunate: single distal articular facet for the capitate type II lunate: additional distal articular facet medially f...
Article

Faceless kidney

A faceless kidney refers to one in which the normal appearance of the renal sinus on cross-sectional imaging is absent. It was initially described as a sign of duplication of the collecting system 1 (a slice obtained between the two collecting systems will not demonstrate the normal components o...
Case

Horseshoe kidney

 Diagnosis certain
Dr Natalie Yang
Published 27 May 2010
62% complete
CT
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

Supracondylar spur

A supracondylar spur, supracondylar process, supratrochlear spur, or avian spur of the distal anteromedial humeral cortex is an anatomical variant present in ~1% 1,2 of the population.  Gross anatomy The supracondylar spur is typically located on the anteromedial humeral cortex, 5 cm proximal ...
Article

Tracheal bronchus

A tracheal bronchus (with some variations also known as a pig bronchus) is an anatomical variant where an accessory bronchus originates directly from the supracarinal trachea. The latter term (pig bronchus or bronchus suis) is often given when the entire upper lobe (usually right side) is suppli...
Case

Atlanto-occipital assimilation

 Diagnosis certain
Assoc Prof Frank Gaillard
Published 08 Aug 2010
60% complete
X-ray
Article

Cavum veli interpositi

A cavum veli interpositi (CVI), often incorrectly termed a cavum velum interpositum, is an anatomic variation where there is a dilatation of the normal cistern of the velum interpositum. When larger than 1 cm in axial transverse measurement, with outwardly bowed margins and positive mass effect,...
Article

Accessory breast tissue

Accessory breast tissue is a relatively common congenital condition in which abnormal accessory breast tissue is seen in addition to the presence of normal breast tissue. This normal variant can present as a mass anywhere along the course of the embryologic mammary streak (axilla to the inguinal...
Case

Pancake adrenal gland in patient with a right pelvic kidney

Renal Ultrasound
...
 Diagnosis certain
Dr Lee-Anne Slater
Published 19 Oct 2010
69% complete
Ultrasound
Case

Agenesis of the dorsal pancreas

 Diagnosis not applicable
Radswiki
Published 20 Oct 2010
39% complete
CT
Case

Arcuate uterus

 Diagnosis certain
Radswiki
Published 20 Oct 2010
59% complete
MRI

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