Items tagged “variant”
428 results
Case
Bilateral renal malrotation
Published
08 Sep 2014
92% complete
CT
Article
Symphalangism
Symphalangism refers to ankylosis or synostosis of the interphalangeal joints (i.e. fusion of the phalanges) in either the toes or the fingers. Less commonly, the metacarpophalangeal joints may be affected.
Epidemiology
One study reports symphalangism of the fifth toe in ~55% (range 40-75%) of...
Case
Symphalangism of the fifth toe with fracture
Published
09 Sep 2014
83% complete
Annotated image
X-ray
Case
Third, fourth and fifth toe symphalangism
Published
09 Sep 2014
91% complete
X-ray
Case
Left horizontal fissure
Published
22 Sep 2014
82% complete
X-ray
Case
Os vesalianum pedis
Published
21 Sep 2014
86% complete
Annotated image
X-ray
Case
Bilateral accessory parotid glands
Published
21 Sep 2014
95% complete
CT
Annotated image
Case
Symphalangism
Published
10 Oct 2014
88% complete
X-ray
Article
Sternal foramen
Sternal foramen (or perforated sternum) is a developmental variant of the sternum and results from incomplete fusion of the sternal ossification centers. They are common, occurring in approximately 5% of the population (range 4.3-6.7%). They are most commonly found in the inferior aspect of the ...
Case
Bipartite patella
Published
01 Nov 2014
84% complete
X-ray
CT
Case
Bipartite scaphoid
Published
22 Nov 2014
84% complete
X-ray
CT
Article
Bipartite scaphoid
A bipartite scaphoid is a rare example of a divided carpus. There is controversy whether this condition is congenital (i.e. normal variant) or post-traumatic. Bipartite scaphoids may be unilateral or bilateral.
Diagnosis
Diagnostic criteria have been proposed 3:
no history of traumatic injury...
Case
Bifid ureter
Published
10 Dec 2014
91% complete
X-ray
Article
Ball and socket ankle joint
A ball and socket ankle joint is a variant affecting the ankle where there is a rounded or spherical configuration to the talar dome with the corresponding concavity of the tibial plafond. The distal fibula may or may not be involved.
Pathology
The etiology has been debated with two theories p...
Case
Accessory right inferior hepatic vein
Published
31 Dec 2014
62% complete
CT
Article
Ring meniscus
A ring meniscus is a very rare anatomical variant of the lateral meniscus of the knee. The inner margin of a ring meniscus on coronal images can easily be mistaken for a bucket-handle meniscal tear displaced into the intercondylar space, so it is usually diagnosed during arthroscopy.
Article
Splenogonadal fusion
Splenogonadal fusion is a rare anomaly that occurs when there is congenital fusion between a portion of the spleen and a gonad or other mesonephric derivative.
Epidemiology
Much more common in male patients (~95%), occurs most commonly on the left (98%) and usually involves the testis (95%). H...
Case
Complete tracheal ring
Published
08 Jul 2015
83% complete
CT
Case
Bifid rib
Published
03 Feb 2015
83% complete
X-ray
CT
Article
Agenesis of the right hepatic lobe
Agenesis of the right hepatic lobe is a rare variation in liver anatomy.
Radiographic features
absence of the right hepatic lobe
absence of right hepatic artery, right portal vein, and right hepatic biliary system
compensatory hypertrophy of the left hepatic lobe and caudate lobe
possible r...
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