Items tagged “variant”

559 results found
Article

Weigert-Meyer law

The Weigert-Meyer law describes the relationship of the upper and lower renal moieties in duplicated collecting systems to their drainage inferiorly. Weigert-Meyer law With duplex kidney and complete ureteral duplication, the upper renal and lower renal moieties are drained by separate ureters...
Article

Circumcaval ureter

Circumcaval ureter, also known as retrocaval ureter, is a term used to describe an abnormal course of a ureter that encircles the inferior vena cava. Both of these terms are somewhat misleading, as this configuration is considered a developmental anomaly of the inferior vena cava (IVC). There ar...
Article

Circumcaval ureter

Circumcaval ureter, also known as retrocaval ureter, is a term used to describe an abnormal course of a ureter that encircles the inferior vena cava. Both of these terms are somewhat misleading, as this configuration is considered a developmental anomaly of the inferior vena cava (IVC). There ar...
Article

T-shaped uterus

T-shaped uterus refers to a specific radiographic appearance of the endometrial cavity. Pathology It is the most commonly associated abnormality from in utero diethylstilbestrol (DES) exposure, seen in 31% of exposed women. It is classified as a class VII Müllerian duct anomaly. Background D...
Article

T-shaped uterus

T-shaped uterus refers to a specific radiographic appearance of the endometrial cavity. Pathology It is the most commonly associated abnormality from in utero diethylstilbestrol (DES) exposure, seen in 31% of exposed women. It is classified as a class VII Müllerian duct anomaly. Background D...
Case

Duplicated inferior vena cava

 Diagnosis almost certain
Dr Paresh K Desai
Published 29 Mar 2011
56% complete
MRI
Case

Duplicated inferior vena cava

 Diagnosis almost certain
Dr Paresh K Desai
Published 29 Mar 2011
56% complete
MRI
Case

Accessory lateral gastrocnemius muscle

 Diagnosis certain
Dr Paresh K Desai
Published 12 Apr 2011
92% complete
MRI
Article

Accessory sutures

The parietal and occipital bones in particular are common regions for accessory sutures because of their multiple ossification centers. It is important to know these anatomic variations, mainly on the head trauma image studies in children, where it could be difficult to differentiate non-depres...
Article

Accessory sutures

The parietal and occipital bones in particular are common regions for accessory sutures because of their multiple ossification centers. It is important to know these anatomic variations, mainly on the head trauma image studies in children, where it could be difficult to differentiate non-depres...
Article

Hemivertebra

Hemivertebra is a type of vertebral anomaly and results from a lack of formation of one half of a vertebral body. It is a common cause of congenital scoliosis.  Epidemiology The estimated incidence is at ~0.3 per 1000 live births 2. Associations Recognized associations are many and include: ...
Article

Hemivertebra

Hemivertebra is a type of vertebral anomaly and results from a lack of formation of one half of a vertebral body. It is a common cause of congenital scoliosis.  Epidemiology The estimated incidence is at ~0.3 per 1000 live births 2. Associations Recognized associations are many and include: ...
Article

Transitional vertebra

A transitional vertebra is one that has indeterminate characteristics and features of vertebrae from adjacent vertebral segments. They occur at the junction between spinal morphological segments: atlanto-occipital junction atlanto-occipital assimilation: complete or partial fusion of C1 and th...
Article

Transitional vertebra

A transitional vertebra is one that has indeterminate characteristics and features of vertebrae from adjacent vertebral segments. They occur at the junction between spinal morphological segments: atlanto-occipital junction atlanto-occipital assimilation: complete or partial fusion of C1 and th...
Article

Lumbosacral transitional vertebra

Lumbosacral transitional vertebrae (LSTV) are a relatively common variant and can be seen in ~25% (range 15-35%) of the general population 1-3. Non-recognition of this variant and/or poor description in the report can lead to operations or procedures performed at the wrong level.  Depending on ...
Article

Lumbosacral transitional vertebra

Lumbosacral transitional vertebrae (LSTV) are a relatively common variant and can be seen in ~25% (range 15-35%) of the general population 1-3. Non-recognition of this variant and/or poor description in the report can lead to operations or procedures performed at the wrong level.  Depending on ...
Case

Onodi cells

 Diagnosis certain
Dr Roberto Schubert
Published 18 Jun 2011
95% complete
CT
Case

Onodi cells

 Diagnosis certain
Dr Roberto Schubert
Published 18 Jun 2011
95% complete
CT
Case

Aortic arch origin of left vertebral artery

 Diagnosis certain
Dr Roberto Schubert
Published 17 Jul 2011
68% complete
MRI
Article

Block vertebra

Block vertebra is a type of vertebral anomaly where there is a failure of separation of two or more adjacent vertebral bodies. It is an anatomic variant. Pathology In a block vertebra, there is partial or complete fusion of adjacent vertebral bodies. Associations hemivertebrae/absent vertebr...