Items tagged “variant”
367 results found
Published 22 Feb 2012
Abnormal renal vascular impression on intravenous pyelogram
Published 07 May 2012
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...
Duplication of the inferior vena cava
Published 14 Dec 2012
Published 15 Jan 2013
Accessory lateral gastrocnemius muscle
Published 12 Apr 2011
Right sided aortic arch
Published 06 May 2013
Diagnosis not applicable
Published 21 May 2013
Bipartite patella on MRI
Published 29 Aug 2013
Bilateral persistent median artery of the forearm with unilateral bifid median nerve
Diagnosis almost certain
Published 12 Apr 2012
Bicarotid trunk and aberrant right subclavian artery
Published 27 Jul 2012
Artery of Percheron
The artery of Percheron is a rare variant of the posterior cerebral circulation characterised by a solitary arterial trunk that supplies blood to the paramedian thalami and the rostral midbrain bilaterally. Gross anatomy The term is used to refer to a solitary arterial trunk that branches from...
A tracheal bronchus (with some variations also known as a pig bronchus) is an anatomical variant where an accessory bronchus originates directly from the supracarinal trachea. The latter term (pig bronchus or bronchus suis) is often given when the entire upper lobe (usually right side) is suppli...
A cardiac bronchus is a rare variant of the tracheobronchial tree, arising from the medial aspect of the bronchus intermedius. Epidemiology This anomaly is rare and is reported in ~0.3% (range 0.09-0.5%) of individuals 3-5. There may be a predilection for males. It is the only recognised true ...
Aberrant left pulmonary artery
Aberrant left pulmonary artery, also known as pulmonary sling, represents an anatomical variant characterised by the left pulmonary artery arising from the right pulmonary artery and passing above the right main bronchus and in between the trachea and oesophagus to reach the left lung. It may le...
A sublabral foramen or hole is simply separation of the labrum from the underlying glenoid. It is a labral variant of no clinical significance and can be confused with a SLAP lesion. Sublabral foramen are located anterosuperiorly and can extend down to but not below the 3 o'clock position, whi...
Glenoid labrum variants
There are a number of glenoid labral variants, whose importance is mainly due to the fact that the unwary may misinterpret them as pathology (e.g. Bankart lesion or labral tear). These include: Buford complex sublabral foramen superior sublabral sulcus
Arc of Riolan
The arc of Riolan (AOR), also known as the mesenteric meandering artery (of Moskowitz) or central anastomotic mesenteric artery, is an arterio-arterial anastomosis between the superior and inferior mesenteric arteries. Gross anatomy It is an inconstant artery that connects the proximal superio...
Wormian bones are a subset of the small intrasutural bones that lie between the cranial sutures formed by the bones of the skull vault. The title Wormian bones is reserved for abnormal intrasutural bones that are typically found around the lambdoid suture. Some consider them abnormal only if gr...
Splenunculi (also known as supernumerary, accessory spleens, or splenules) are small nodules of spleen that are separate from the rest of the organ. They are benign and asymptomatic, their importance is mainly related to the need to distinguish them from more sinister pathology. Epidemiology ...