65 results found
Article
CT pelvis (protocol)
The CT pelvis protocol serves as an outline for the acquisition of a pelvic CT. As a separate examination, it might be performed as a non-contrast or contrast study or might be combined with a CT hip or rarely with a CT cystogram. A pelvic CT might be also conducted as a part of other scans such...
Article
Acetabular version angle
The acetabular version angle or acetabular anteversion angle is a measurement used on cross-sectional imaging especially pelvic CT for the assessment of acetabular morphology.
Usage
The acetabular version angle is influenced by pelvic obliquity and pelvic tilt, which might lead to measurement ...
Article
Acetabular sector angle
The acetabular sector angles are a set of angles, comprising the anterior acetabular sector angle (AASA), the posterior acetabular sector angle (PASA) and horizontal acetabular sector angle (HASA) and are used on cross-sectional imaging, especially pelvic CT, for the evaluation of acetabular cov...
Article
Pelvic fractures (summary)
This is a basic article for medical students and other non-radiologists
Pelvic fractures are a heterogeneous group of injuries that can occur secondary to a variety of mechanisms that range from an innocuous simple fall to severe high-energy trauma in a road traffic collision.
Reference articl...
Article
Solitary bone tumor imaging reporting and data system (BTI-RADS)
Solitary bone tumor imaging reporting and data system (BTI-RADS) is a reporting and communication tool designed to stratify benign and malignant bone lesions and to communicate them in a systematic and standardized way 1,2.
History and etymology
The solitary bone tumor imaging reporting and da...
Article
Pelvis
The term pelvis (plural: pelvises or pelves) can refer to either the bony pelvis or the pelvic cavity.
Bony pelvis
The bony pelvis is formed by the sacrum and coccyx and a pair of hip bones ("ossa coxae"), which are part of the appendicular skeleton. Its primary function is the transmission of...
Article
Pelvic fractures
Pelvic fractures can be simple or complex and can involve any part of the bony pelvis. Pelvic fractures can be fatal due to pelvic hemorrhage, and an unstable pelvis requires immediate management.
Epidemiology
Pelvic fractures can be seen in any group of patients. Like much trauma, there is a ...
Article
Acetabular fracture
Acetabular fractures are a type of pelvic fracture, which may also involve the ilium, ischium or pubis depending on fracture configuration.
Epidemiology
Acetabular fractures are uncommon. The reported incidence is approximately 3 per 100,000 per year. This study reported a 63% to 37% male to f...
Article
Pelvic radiograph (an approach)
Pelvic radiographs are a mainstay radiographic examination in trauma imaging. The standard radiographic exam is an AP pelvis, however more specialized projections can be requested to answer specific clinical questions. For a list of the specialized views see the pelvis series article.
Systemati...
Article
Pelvic insufficiency fractures
Pelvic insufficiency fractures are a relatively common subtype of insufficiency fracture, and are recognized as a major cause of low back, buttock and groin pain in susceptible populations.
Epidemiology
Senile/postmenopausal osteoporosis is the most common predisposing factor. Other important ...
Article
Intrapelvic cup migration
Intrapelvic cup migration is a serious complication after total hip arthroplasty, in which the prosthetic acetabular cup migrates or drifts into the pelvic inlet.
Epidemiology
Fortunately, this complication is very rare. There seems to be a female predisposition 1-3.
Risk factors
Factors inc...
Article
Crossover sign (femoroacetabular impingement)
The crossover sign, also known as the 'figure of 8' sign, is a plain film sign that indicates acetabular retroversion 2. Acetabular retroversion is a form of pincer morphology and predisposing factor for femoroacetabular impingement and is thought to promote osteoarthritis of the hip 3.
Radiog...
Article
Psoas muscle abscess
Psoas abscess is a collection of pus located in the iliopsoas muscle compartment. It can occur either via contiguous or hematogenous spread from distant sites.
It has a relatively rare incidence, nevertheless timely diagnosis and treatment is important as it significantly reduces morbidity and ...
Article
Proximal femoral fractures (summary)
This is a basic article for medical students and other non-radiologists
Proximal femoral fractures are a heterogeneous group of fractures that occur in and around the hip. The commonest type of fracture in this region is the femoral neck fracture.
They can occur anywhere between the joint surf...
Article
Aggressive angiomyxoma
Aggressive angiomyxomas are rare tumors that arise in the pelvis and typically cross the levator ani muscles. Despite its name, it is essentially a benign tumor and the term "aggressive" is due to a predilection for local recurrence. Only rarely does it metastasize.
Epidemiology
It is seen pre...
Article
Posterior dislocation of the hip
Posterior dislocations of the hip, although uncommon, are the most common direction of dislocation for this joint, outnumbering anterior dislocations 9:1.
Pathology
It most frequently occurs in the setting of significant trauma, given a large amount of force required. The most common scenario ...
Article
Paget disease (bone)
Paget disease of the bone is a common, chronic metabolic bone disorder characterized by excessive abnormal bone remodeling. The classically described radiological appearances are expanded bone with a coarsened trabecular pattern. The pelvis, spine, skull, and proximal long bones are most frequen...
Article
Pubic diastasis
A separation of the pubic symphysis without concomitant fracture constitutes pubic diastasis.
Excessive lateral or anterior movement can be seen secondary to pubic diastasis and this can further lead to pubic symphysis dysfunction.
Clinical presentation
pain
swelling
patient’s legs will inv...
Article
CT hip (protocol)
The CT hip protocol serves as an examination for the evaluation of the hip joint. It is often performed as a non-contrast study. However, it can be combined with a CT arthrogram for the evaluation of chondral and/or labral tears or a femoral neck version scan.
Note: This article aims to frame a...
Article
Metastatic melanoma
Metastatic melanoma is known for its aggressive nature and for its ability to metastasize to a variety of atypical locations, which is why it demonstrates poor prognostic characteristics.
Epidemiology
Melanoma accounts for ~5% of all skin cancers, however, it remains the leading cause of death...
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