Items tagged “variant”
426 results found
Case
Aberrant internal carotid artery
Published
23 Mar 2013
62% complete
CT
Article
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...
Article
Wandering spleen
Wandering spleen is a rare condition in which the spleen migrates from its usual anatomical position, commonly to the lower abdomen or pelvis.
Epidemiology
Wandering spleen is rare, with a reported incidence of <0.5%.
Diagnosis is most commonly made between the ages of 20-40 years and is more...
Case
Bridging of the left anterior descending artery
Published
25 Apr 2013
86% complete
CT
Article
Pericardial agenesis
Pericardial agenesis is a rare condition where there is the absence of the pericardium to varying degrees. If it is only a small portion of the pericardium that is absent it is known as a pericardial defect.
Epidemiology
According to a surgical and pathological series, the prevalence (inclusiv...
Case
Right sided aortic arch
Published
06 May 2013
91% complete
Annotated image
Article
Dorsal defect of the patella
Dorsal defects of the patella are benign subchondral lesions of unknown etiology and a normal developmental anomaly of the patella, which can be mistaken for a pathological process such as a focus of infection or osteochondritis dissecans.
Epidemiology
Dorsal defect of patella occurs in males ...
Case
Supraclavicular foramen
Published
21 May 2013
60% complete
X-ray
Case
Cavum septum pellucidum
Published
25 May 2013
65% complete
CT
Case
Inferior accessory fissure of the right lung
Published
27 May 2013
45% complete
Annotated image
X-ray
CT
Article
Accessory ossicles of the wrist
Accessory ossicles of the wrist are commonly seen on plain radiographs of the wrist and associated cross-sectional imaging. Over 20 were originally described 2, although the more common include 1:
lunula: between TFCC and triquetrum
os styloideum (carpal boss): on dorsal surface of 2nd or 3rd ...
Article
Multipartite hallux sesamoid
Multipartite hallux sesamoids are a commonly seen normal variant, present in up to 33% of hallux sesamoids. They are more commonly bipartite than tripartite.
The medial (tibial) sesamoid is more likely to be multipartite than the lateral (fibular) sesamoid because it more commonly has more tha...
Article
Castellvi classification of lumbosacral transitional vertebrae
The Castellvi classification is used for lumbosacral transitional vertebra (LSTV):
type I: enlarged and dysplastic transverse process (at least 19 mm)
Ia: unilateral
Ib: bilateral
type II: pseudoarticulation of the transverse process and sacrum with incomplete lumbarization/sacralization; en...
Case
Ischiopubic synchondrosis asymmetry
Published
04 Aug 2013
72% complete
X-ray
Article
Ectopic ureter
An ectopic ureter is a congenital renal anomaly that occurs as a result of abnormal caudal migration of the ureteral bud during its insertion to the urinary bladder. Normally the ureter drains via the internal ureteral orifice at the trigone of the urinary bladder.
In females, the most common ...
Case
PICA termination of hypoplastic vertebral artery
Published
10 Aug 2013
87% complete
MRI
Case
Bilateral duplex collecting system
Published
17 Aug 2013
95% complete
CT
Case
Bipartite patella on MRI
Published
29 Aug 2013
84% complete
Annotated image
MRI
Case
Left sided inferior vena cava
Published
13 Sep 2013
94% complete
Ultrasound
Case
Bicornuate uterus
Published
14 Sep 2013
72% complete
Ultrasound
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