Items tagged “variant”

422 results found
Article

Dorsal defect of the patella

Dorsal defects of the patella are benign subchondral lesions of unknown etiology and a normal developmental anomaly of the patella, which can be mistaken for a pathological process such as a focus of infection or osteochondritis dissecans. Epidemiology Dorsal defect of patella occurs in males ...
Case

Supraclavicular foramen

 Diagnosis not applicable
Dr Maulik S Patel
Published 21 May 2013
60% complete
X-ray
Case

Cavum septum pellucidum

 Diagnosis almost certain
Dr David Cuete
Published 25 May 2013
65% complete
CT
Case

Inferior accessory fissure of the right lung

 Diagnosis not applicable
Dr Ahmed Abdrabou
Published 27 May 2013
45% complete
X-rayCTAnnotated image
Article

Accessory ossicles of the wrist

Accessory ossicles of the wrist are commonly seen on plain radiographs of the wrist and associated cross-sectional imaging. Over 20 were originally described 2, although the more common include 1: lunula: between TFCC and triquetrum os styloideum (carpal boss): on dorsal surface of 2nd or 3rd ...
Article

Multipartite hallux sesamoid

Multipartite hallux sesamoids are a commonly seen normal variant, present in up to 33% of hallux sesamoids. They are more commonly bipartite than tripartite.  The medial (tibial) sesamoid is more likely to be multipartite than the lateral (fibular) sesamoid because it more commonly has more tha...
Article

Castellvi classification of lumbosacral transitional vertebrae

The Castellvi classification is used for lumbosacral transitional vertebra (LSTV): type I: enlarged and dysplastic transverse process (at least 19 mm) Ia: unilateral Ib: bilateral type II: pseudoarticulation of the transverse process and sacrum with incomplete lumbarization/sacralization; en...
Case

Ischiopubic synchondrosis asymmetry

 Diagnosis certain
Dr Jeremy Jones
Published 04 Aug 2013
72% complete
X-ray
Article

Ectopic ureter

An ectopic ureter is a congenital renal anomaly that occurs as a result of abnormal caudal migration of the ureteral bud during its insertion to the urinary bladder. Normally the ureter drains via the internal ureteral orifice at the trigone of the urinary bladder.  In females, the most common ...
Article

Ectopic ureter

An ectopic ureter is a congenital renal anomaly that occurs as a result of abnormal caudal migration of the ureteral bud during its insertion to the urinary bladder. Normally the ureter drains via the internal ureteral orifice at the trigone of the urinary bladder.  In females, the most common ...
Case

PICA termination of hypoplastic vertebral artery

 Diagnosis certain
Dr Gaurav Som Prakash Gupta
Published 10 Aug 2013
87% complete
MRI
Case

Bilateral duplex collecting system

 Diagnosis certain
Dr Boris Schulz
Published 17 Aug 2013
95% complete
CT
Case

Bipartite patella on MRI

 Diagnosis certain
Dr Ahmed Abdrabou
Published 29 Aug 2013
84% complete
Annotated imageMRI
Case

Left sided inferior vena cava

 Diagnosis certain
Dr Arun Prasad B
Published 13 Sep 2013
94% complete
Ultrasound
Case

Bicornuate uterus

 Diagnosis almost certain
Dr Prasanta Kumar Nayak
Published 14 Sep 2013
72% complete
Ultrasound
Article

Hippocampal sulcus remnant cyst

Hippocampal sulcus remnant cysts, also known as hippocampal cavities, are remnants of incomplete involution of the embryonic hippocampal fissure and are an incidental finding.   Epidemiology They are seen in ~25% (range 10-40%) of the adult population 1,3. Radiographic features MRI They con...
Article

Aberrant arachnoid granulations

Aberrant arachnoid granulations are arachnoid granulations that penetrated the dura but failed to migrate normally in the venous sinus. They are most often located in the greater wing of the sphenoid bone. Occasionally, they are seen in the posterior temporal bone wall. Clinical presentation A...
Case

Absent ligamentum teres of the hip

 Diagnosis almost certain
Dr Roberto Schubert
Published 30 Sep 2013
74% complete
MRI
Case

Os triangulare

 Diagnosis certain
Dr Henry Knipe
Published 01 Oct 2013
86% complete
X-rayAnnotated image
Article

Os triangulare

The os triangulare (also known as the os intermedium antebrachii or os triquetrum secundarium) is an accessory ossicle located between the ulnar styloid, lunate and triquetrum 1,2. They may be unilateral or bilateral and the main differential diagnosis is non-union of an ulnar styloid process f...

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