Items tagged “variant”

422 results found
Article

Ectopic posterior pituitary

An ectopic posterior pituitary reflects a disruption of normal embryogenesis of the posterior pituitary and is one of the more common causes of pituitary dwarfism. Although it can be an isolated abnormality, numerous other congenital central nervous system malformations have been identified. Whe...
Article

Ectopic posterior pituitary

An ectopic posterior pituitary reflects a disruption of normal embryogenesis of the posterior pituitary and is one of the more common causes of pituitary dwarfism. Although it can be an isolated abnormality, numerous other congenital central nervous system malformations have been identified. Whe...
Case

Persistent trigeminal artery

 Diagnosis certain
Dr Prashant Gupta
Published 18 May 2012
91% complete
Annotated image
Case

Os supratrochleare dorsale

 Diagnosis almost certain
Dr Charlie Chia-Tsong Hsu
Published 18 Jun 2012
72% complete
X-ray
Article

Lunotriquetral coalition

Lunotriquetral coalition is the most common type of carpal coalition and represents a congenital fusion of the lunate and triquetral bones of the carpus.  Epidemiology Lunotriquetral coalition is the most common type of carpal coalition with a prevalence of 0.1%. It is more common in females (...
Case

Azygos continuation of the inferior vena cava

 Diagnosis certain
Dr P Wojnik
Published 11 Jul 2012
65% complete
CT
Case

Left sided superior vena cava

 Diagnosis certain
Dr P Wojnik
Published 11 Jul 2012
80% complete
CT
Article

Anterior angulation of the coccyx

Anterior angulation of the coccyx may be a normal variant but poses a diagnostic challenge for those considering coccygeal trauma. Classification Four types of coccyx have been described: type I: the coccyx is curved slightly forward, with its apex pointing caudally (~70%) type II: the coccy...
Case

Persistent trigeminal artery

 Diagnosis certain
Dr Chris O'Donnell
Published 20 Jul 2012
77% complete
MRI
Case

Polysplenia syndrome

 Diagnosis certain
Dr Ian Bickle
Published 24 Jul 2012
98% complete
CT
Case

Bicarotid trunk and aberrant right subclavian artery

 Diagnosis certain
Dr Roberto Schubert
Published 27 Jul 2012
80% complete
CTMRI
Article

Duplication of inferior vena cava

Duplication of the inferior vena cava is a relatively rare vascular anomaly, but this caval abnormality needs to be recognized, especially in association with renal anomalies like crossed fused ectopia or circumaortic renal collar 1,2. Epidemiology The incidence of inferior vena cava duplicati...
Case

Azygos lobe

 Diagnosis certain
Dr Maxime St-Amant
Published 05 Sep 2012
82% complete
X-ray
Article

Accessory ossicle of the anterior arch of the atlas

The accessory ossicle of the anterior arch of the atlas is a normal variant and is best appreciated on a lateral cervical/sagittal study. It is observed as a circular and corticated osseous density that articulates with the inferior aspect of the anterior arch of the atlas.  It is not associate...
Article

Metopic suture

The metopic suture (also known as the frontal, interfrontal, or median frontal suture) is a vertical fibrous joint that divides the two halves of the frontal bone and is present in a newborn. Gross anatomy This suture runs through the midline across the frontal bone from the nasion to the breg...
Case

Duplex collecting system

 Diagnosis almost certain
Dr Sajoscha Sorrentino
Published 02 Nov 2012
63% complete
Ultrasound
Case

Arcuate foramen

 Diagnosis certain
Dr Patrick Nicholson
Published 13 Nov 2012
82% complete
X-ray
Article

Partial anomalous pulmonary venous return

Partial anomalous pulmonary venous return (PAPVR), also known as partial anomalous pulmonary venous connection (PAPVC), is a rare congenital cardiovascular condition in which some of the pulmonary veins, but not all, drain into the systemic circulation rather than in the left atrium. Clinical p...
Article

Partial anomalous pulmonary venous return

Partial anomalous pulmonary venous return (PAPVR), also known as partial anomalous pulmonary venous connection (PAPVC), is a rare congenital cardiovascular condition in which some of the pulmonary veins, but not all, drain into the systemic circulation rather than in the left atrium. Clinical p...
Article

Sprengel deformity

Sprengel deformity, or congenital elevation of the scapula, is a complex deformity of the shoulder and is the most common congenital shoulder abnormality. An initial diagnosis can often be made on radiography, but CT or MRI is often necessary to evaluate the details of the abnormality. Clinical...

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