Items tagged “variant”
426 results found
Case
Os peroneum fracture
Published
09 Jan 2014
82% complete
MRI
X-ray
Case
Hyperostosis frontalis interna
Published
12 Jan 2014
78% complete
CT
Article
Duplex appendix
Duplex appendix is a rare anomaly of the appendix and is usually discovered incidentally during surgery for appendicitis.
Epidemiology
Duplication of the vermiform appendix is extremely rare. It is found in only 1 in 25,000 patients (incidence ~0.004%) operated on for acute appendicitis. Altho...
Case
Double appendix
Published
18 Jan 2014
94% complete
Barium
Article
Superior sublabral sulcus
A superior sublabral sulcus or superior sublabral recess is a small synovial lined gap or detachment between the labral free edge and the cartilage, forming a normal glenoid labral variant 1. It can be associated with a sublabral foramen.
Gross anatomy
The superior labral sulcus or recess is a...
Case
Right occipital sinus with atretic right transverse sinus
Published
25 Jan 2014
59% complete
MRI
Article
Retrocaval thymus
Retrocaval thymus is defined as an ectopic location of thymus between the superior vena cava and great arteries. It is a rare finding and mostly asymptomatic.
Radiographic features
Plain radiograph
may mimic mediastinal mass or right upper lobe collapse 2
CT and MRI
soft tissue that is cons...
Case
Lumbarization of S1
Published
04 Feb 2014
89% complete
CT
Article
Gallbladder agenesis
Agenesis of the gallbladder describes the rare congenital absence of the gallbladder.
Epidemiology
overall incidence is estimated at <0.1% (range 0.04-0.1%)
gender:
reported 3:1 female predominance of symptomatic cases
equivalent gender distribution in autopsy cases
Associations
Gallblad...
Article
Os vesalianum pedis
An os vesalianum pedis is an accessory ossicle of the foot. Although asymptomatic, it may become symptomatic occasionally, causing lateral foot pain and requiring surgical excision 2.
Gross anatomy
It is formed as a result of failed fusion of the secondary ossification center of the metatarsal...
Article
Zuckerkandl tubercle
Zuckerkandl tubercles are the projections of normal thyroid tissue from the posterior or posteromedial margin of the thyroid gland that extend posterior to the tracheoesophageal groove. They are present in most patients and occur more commonly on the right and in the longitudinal center 50% of t...
Case
Os triangulare
Published
20 Feb 2014
85% complete
X-ray
Article
Lunula
The lunula is an accessory ossicle of the wrist. It lies in the TFCC, between the tip of the ulna styloid process and the triquetrum. It may be fused to the ulna styloid, giving it an elongated appearance.
Differential diagnosis
os triangulare: lies more radial
ulna styloid fracture
persist...
Case
Medial malleolus ossicle
Published
26 Feb 2014
66% complete
X-ray
Case
Ductus diverticulum
Published
27 Feb 2014
71% complete
CT
Case
Right aortic arch
Published
27 Feb 2014
86% complete
CT
Article
Os acetabuli
Os acetabuli (plural: ossa acetabuli) are small ossicles adjacent to the acetabular roof regions and may represent an unfused secondary ossification center of the acetabulum or pathological sequelae (e.g. acetabular rim fracture, femoroacetabular impingement).
Gross anatomy
Ossa acetabuli are ...
Case
Persistent trigeminal artery - Saltzman type I
Published
28 Feb 2014
77% complete
MRI
Case
Anomalous origin of the circumflex artery with retro-aortic course
Published
01 Mar 2014
95% complete
CT
Case
Fetal origin of posterior cerebral artery
Published
05 Mar 2014
59% complete
MRI
Unable to process the form. Check for errors and try again.