Items tagged “variant”
426 results found
Article
Occipital vertebra
Occipital vertebrae are rare anatomical variants that result from incomplete or aberrant fusion of occipital bone ossification centers. There is a broad spectrum of occipital vertebrae, the more common variants include:
third condyle (condylus tertius)
basilar process
prebasioccipital arch
p...
Case
Fabella
Published
12 Nov 2013
82% complete
X-ray
Annotated image
Case
Bilateral cervical ribs
Published
12 Nov 2013
92% complete
CT
Case
Left subclavian artery arising from right subclavian artery
Published
16 Nov 2013
92% complete
CT
Article
Abnormal renal rotation
Abnormal renal rotation, also known as renal malrotation, refers to an anatomical variation in the position of the kidneys, in particular to anomalous orientation of the renal hilum. It may occur unilaterally or bilaterally. It is almost always an asymptomatic incidental finding.
Epidemiology
...
Article
Intrathoracic kidney
An intrathoracic kidney is a very rare form of ectopic kidney. There has been no reported increased incidence of stones or infections as can be seen with other forms of ectopic kidneys. The adrenal glands are usually normal in location in most cases.
Epidemiology
Thoracic ectopic kidney is rar...
Case
Variant right hepatic artery
Published
26 Nov 2013
45% complete
CT
Case
Renal dromedary hump
Published
02 Dec 2013
91% complete
Ultrasound
Case
Left arcuate foramen
Published
03 Dec 2013
80% complete
CT
Case
Accessory ossicle of the anterior arch of C1
Published
04 Dec 2013
89% complete
CT
Case
Os supranaviculare
Published
05 Dec 2013
86% complete
X-ray
Annotated image
Case
Supraclavicular foramen
Published
08 Dec 2013
85% complete
X-ray
Article
Supraclavicular foramen
The supraclavicular foramen is a normal variant and typically found as an incidental finding on radiographs. It occurs in ~4% (range 2-6%) of the population.
Supraclavicular foramen appear as an osseous tunnel or tunnels, with the most typical position at the superior aspect of the junction of...
Case
Lateral malleolus avulsion fracture with os subfibulare
Published
09 Dec 2013
86% complete
X-ray
Annotated image
Case
Aberrant right subclavian artery
Published
17 Dec 2013
77% complete
CT
Article
Polyorchidism
Polyorchidism, also known as supernumerary testes, refers to the presence of more than two testes and is a very rare congenital anomaly. The supernumerary testis can be usually located inside the scrotum (75% of the patients) or less commonly in the inguinal canal, the retroperitoneum, or the ab...
Article
Superior accessory fissure
The superior accessory fissure is present in around 5% of individuals examined with CT 4 and PA chest X-rays 5.
Gross anatomy
The superior accessory fissure of the right lower lobe is located in the same plane and posterior to the right transverse (minor) fissure. It separates the right lower ...
Case
Single coronary artery
Published
03 Jan 2014
74% complete
CT
Article
Crossed renal ectopia
Crossed renal ectopia is said to be present when the kidney is seen in the opposite retroperitoneal space. It is more common for the left kidney to be ectopically located on the right side. More than 85% of these get fused resulting in crossed fused renal ectopia. Less than 15% cases are non-fus...
Case
Bovine arch
Published
09 Jan 2014
83% complete
CT