Articles
Articles are a collaborative effort to provide a single canonical page on all topics relevant to the practice of radiology. As such, articles are written and continuously improved upon by countless contributing members. Our dedicated editors oversee each edit for accuracy and style. Find out more about articles.
620 results found
Article
Incarcerated uterus
An incarcerated uterus or trapped uterus describes an uncommon situation where a retroverted or retroflexed gravid uterus fails to ascend into the abdominal cavity.
Epidemiology
This is an uncommon presentation and is said to occur in 1 in 3000 pregnancies 1. Uncomplicated retroversion may be ...
Article
Acute abdominal pain
Acute abdominal pain is a common acute presentation in clinical practice. It encompasses a very broad range of possible etiologies and diagnoses, and imaging is routinely employed as the primary investigative tool in its modern management.
Terminology
A subgroup of patients with acute abdomina...
Article
Leiomyolipoma
Leiomyolipomas are rare benign tumors of the uterus, similar to leiomyomas, except that they contain bulk fat.
Epidemiology
Leiomyolipomas are typically found in postmenopausal women, on a background of additional leiomyomas 1.
Clinical presentation
The majority are asymptomatic and discover...
Article
Rectovaginal fistula
Rectovaginal fistulae are a type of colovaginal fistula where there is an abnormal fistulous connection between the rectum and the vagina. It is considered the most common gastrointestinal fistula involving the female genital tract 1.
Pathology
They can occur from a number of causes that inclu...
Article
Pelvic inflammatory disease
Pelvic inflammatory disease (PID) is a broad term that encompasses a spectrum of infection and inflammation of the upper female genital tract, resulting in a range of abnormalities.
Epidemiology
The highest incidence is seen among sexually-active women in their teens, with 75% of cases being ...
Article
Paraurethral duct cyst
Paraurethral duct cysts are retention cysts that form secondary to inflammatory obstruction of the paraurethral (Skene) ducts in females.
Pathology
The cysts are lined by stratified squamous epithelium due to their origin from the urogenital sinus.
Clinical presentation
Usually asymptomatic....
Article
Ovarian vein thrombosis
Ovarian vein thrombosis (actually most often thrombophlebitis) occurs most commonly in postpartum patients and can result in pulmonary emboli. A presentation is usually with acute pelvic pain in the postpartum period, then termed puerperal ovarian vein thrombosis or postpartum ovarian vein throm...
Article
Endometrial polyp
Endometrial polyps are benign nodular protrusions of the endometrial surface, and one of the entities included in a differential of endometrial thickening. Endometrial polyps can either be sessile or pedunculated. They can often be suggested on ultrasound or MRI studies but may require sonohyste...
Article
Pelvic protocol for endometriosis (MRI)
Evaluation of known endometriosis with MRI requires a slightly different protocol to a routine pelvic MRI (see pelvic MRI protocol: routine) and should probably be reserved for known cases of endometriosis rather than for the assessment of pelvic pain.
IV or IM Buscopan is administered to reduc...
Article
Uterine prolapse
Uterine prolapse is a form of pelvic organ prolapse and can fall under a broader umbrella term of pelvic floor dysfunction. It may occur in isolation or in combination with other organs (i.e rectal prolapse +/- urinary bladder prolapse).
Epidemiology
Typically occurs in multiparous older femal...
Article
Pubococcygeal line
The pubococcygeal line (PCL) is a reference line for the pelvic floor on imaging studies and helps detect and grade pelvic floor prolapse in defecography studies. It is defined as a line that connects the inferior border of the symphysis pubis (anterior margin) to the final coccygeal joint (post...
Article
Posterior urethral valves
Posterior urethral valves (PUV), also referred to as congenital obstructing posterior urethral membranes (COPUM), are the most common congenital obstructive lesion of the urethra and a common cause of obstructive uropathy in infancy.
Epidemiology
Posterior urethral valves are congenital and on...
Article
Intrauterine gas
The presence of intrauterine gas (a.k.a. pneumouterus) can sometimes be inferred by tiny hyperreflective foci, with dirty reverberation shadows on ultrasound, foci of very low attenuation at computed tomography (CT) or signal voids with susceptibility artifact in MRI. The term encompasses air wi...
Article
Surgical positions
There are various classic surgical positions for patients to be placed in for procedures, which have been adopted/repurposed for interventional radiology and some diagnostic procedures:
lithotomy position
Trendelenburg position and reverse Trendelenburg position
lateral decubitus position
Article
Endometrial osseous metaplasia
Endometrial osseous metaplasia is a very rare pathological condition whereby there may be mature bone formation within the endometrium. This process may be a cause of menorrhagia and/or infertility.
Differential diagnosis
The common diagnostic mimics are iatrogenic endometrial gaseous foci (us...
Article
Sirenomelia
Sirenomelia (also known as the mermaid syndrome) is a rare congenital malformation characterized by the fusion of lower limb structures. The exact etiology of this disease is unknown.
Terminology
sirenomelia sequence
sirenomelia syndrome
Epidemiology
The estimated incidence is at ~1 in 60,0...
Article
Ectopic pregnancy
Ectopic pregnancy refers to the implantation of a fertilised ovum outside of the uterine cavity.
Epidemiology
The overall incidence has increased over the last few decades and is currently thought to affect 1-2% of pregnancies. The risk is as high as 18% for first-trimester pregnancies with bl...
Article
Lipiodol
Lipiodol (also known as ethiodized oil) is an oil-based iodinated contrast medium that was historically used for myelography and hysterosalpingography 1. It was later superseded by newer, less hazardous, agents, and now is used primarily as a therapeutic agent. Guerbet is now the sole manufactur...
Article
Septate uterus
A septate uterus is the most common type of congenital uterine anomaly, and may lead to an increased rate of pregnancy loss. The main imaging differential diagnoses are arcuate uterus and bicornuate uterus.
Epidemiology
It is considered the most common uterine anomaly (accounts for ~55% of suc...
Article
Cesarean section scar diverticulum
Cesarean section scar diverticulum is a form of outpouching located in the anterior lower uterine cavity at the site of a cesarean section scar.
There is some similarity with the term cesarean scar niche.
Clinical presentation
mostly asymptomatic
postmenstrual spotting
Radiographic feature...
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