Items tagged “anatomical variant”

34 results found
Article

5th metacarpal pit

The 5th metacarpal pit refers to the normal exaggeration of the pit-like depression in the head of fifth metacarpal.  It should not be mistaken for a fracture (old or new) or an erosion.
Article

Azygos lobe

An azygos lobe is created when a laterally displaced azygos vein creates a deep pleural fissure into the apical segment of the right upper lobe during embryological development. It is a normal anatomic variant of the right upper lobe due to invagination of the azygos vein and pleura during in th...
Article

Concha bullosa

Concha bullosa (also known as middle turbinate pneumatisation) is a common finding and although associated with deviation of the nasal septum, it is usually of little clinical importance. Epidemiology Concha bullosa is a normal variant and is one of the most common variations of sinonasal anat...
Article

Os acromiale

Os acromiale represents an unfused accessory centre of ossification of the acromion of the scapula.  Epidemiology Os acromiale are relatively common, seen in ~8% (range 1-15%) of the population 1,2 and may be bilateral in 60% of individuals 5. Clinical presentation They are usually asymptoma...
Case

Retroaortic left renal vein (MRI)

 Diagnosis certain
A.Prof Frank Gaillard
Published 15 May 2008
74% complete
MRI
Article

Bifid median nerve

The median nerve may divide into two nerve bundles in the distal forearm and appear as a bifid median nerve in the carpal tunnel. It has an incidence of ~3%.  The median nerve usually divides into two or three branches after exiting the distal edge of the transverse carpal ligament that covers...
Case

Accessory fissure right lower lobe

Accessory fissure...
 Diagnosis certain
A.Prof Frank Gaillard
Published 24 Dec 2009
65% complete
CT
Case

Os acromiale with impingement

Os acromiale.
 Diagnosis certain
Dr Andrew Dixon
Published 12 Apr 2010
85% complete
X-rayMRI
Article

Popliteal artery entrapment syndrome

Popliteal artery entrapment syndrome (PAES) refers to symptomatic compression or occlusion of the popliteal artery due to a developmentally abnormal positioning of the popliteal artery in relation to its surrounding structures such as with the medial head of gastrocnemius (MHG) or less commonly ...
Case

Popliteal artery entrapment syndrome

Time resolved MRA...
 Diagnosis certain
Dr Andrew Dixon
Published 15 Apr 2010
92% complete
MRI
Article

Extensor digitorum brevis manus

The extensor digitorum brevis manus (EDBM) muscle is an accessory muscle in the hand and is a normal anatomical variant.  Summary origin: distal radius and posterior radiocarpal ligament insertion: extensor hood of 2nd or 3rd digits (variable) innervation: posterior interosseous nerve actio...
Case

Branchial cleft cyst

Branchial Cleft C...
 Diagnosis probable
Dr Paul Smith
Published 07 Oct 2010
47% complete
Ultrasound
Case

Anomalous right coronary artery (ARCA) with interarterial course

Cardiac CT, axial...
 Diagnosis certain
Dr Erik Ranschaert
Published 23 Nov 2010
86% complete
CT
Article

Anomalous pancreaticobiliary junction

An anomalous pancreaticobiliary junction describes the abnormal junction of the pancreatic duct and common bile duct that occurs outside the duodenal wall to form a long common channel (> 15 mm). The anomalous junction is often associated with a choledochal cyst or a biliary tract carcinoma and...
Case

Retroaortic left renal vein

 Diagnosis certain
Dr Roberto Schubert
Published 03 Jul 2011
53% complete
CT
Case

Cervical rib

 Diagnosis probable
Dr Roberto Schubert
Published 04 Jul 2011
36% complete
CT
Case

Aberrant right subclavian artery (CTA)

 Diagnosis certain
A.Prof Frank Gaillard
Published 20 Jul 2011
80% complete
CT
Case

Supernumerary toe

 Diagnosis certain
Dr Alexandra Stanislavsky
Published 08 Mar 2012
57% complete
X-ray
Article

Ostiomeatal narrowing due to nasal anatomical variations

Some ostiomeatal complex anatomical variations, which do not characterise disease by itself, can promote narrowing and even obstruction 1: concha bullosa ~10% (range 4-15%) - aerated middle turbinate intralamellar cell: air cell within vertical portion of the middle turbinate  oversized ethm...
Case

Fabella

 Diagnosis certain
Dr Henry Knipe
Published 13 Mar 2013
91% complete
X-ray

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