1,718 results
Article
Fallopian tube
The fallopian tube (TA: tuba uterina 8), also known as the uterine tube or, less commonly, the oviduct, is a paired hollow tube that bridges the ovary and uterus and functions to convey the mature ovum from the former to the latter. If conception occurs, it usually does so within the tube, which...
Article
Floor of mouth
The floor of mouth is an oral cavity subsite and is a common location of oral cavity squamous cell carcinoma.
Gross anatomy
The floor of mouth is a U-shaped space which extends (and includes) from the oral cavity mucosa superiorly, and the mylohyoid muscle sling 2,3.
Boundaries
superiorly:...
Article
Granulomatous invasive fungal sinusitis
Granulomatous invasive fungal sinusitis, sometimes termed granulomatous invasive fungal rhinosinusitis, is a form of invasive fungal sinusitis. Reports describing the imaging findings have been uncommon 1.
Epidemiology
It is rare and has been mainly reported in North Africa, Middle East and As...
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...
Article
Schneiderian papilloma
Schneiderian papillomas, also known as sinonasal papillomas, are benign sinonasal tumors that arise from the Schneiderian epithelium of the nasal cavity and paranasal sinuses.
Epidemiology
Schneiderian papillomas account for ~2.5% (range 0.4-4.7%) of sinonasal tumors 2.
Pathology
The WHO cl...
Article
Intrauterine contraceptive device
Intrauterine contraceptive devices (IUCD), also known as intrauterine devices (IUD) and colloquially commonly as the coil, are one of the most frequently used methods of contraception throughout the world. It prevents pregnancy by:
thinning the endometrial lining
preventing sperm motility
pre...
Article
Amnion
Amnion refers to a membranous structure which covers and protects the embryo. It forms inside the chorion. The amnion usually fuses with the outer chorion by around 14 weeks of gestation.
Radiographic features
Ultrasound
The amnion can be visualized in most pregnancies before the 12th week of...
Article
Bowel perforation (summary)
This is a basic article for medical students and other non-radiologists
Bowel perforation is an acute surgical emergency where there is a release of gastric or intestinal contents into the peritoneal space.
Reference article
This is a summary article; read more in our article on bowel perfora...
Article
Leiomyoma of soft tissue
Soft tissue leiomyomas are benign smooth muscle neoplasms usually found in the somatic deep soft tissues, the retroperitoneum and the abdominal cavity 1.
Epidemiology
Leiomyomas of the deep somatic tissues are rare soft tissue neoplasms that have been primarily found in middle-aged adults with...
Article
Midventricular hypertrophic cardiomyopathy
Midventricular hypertrophic cardiomyopathy is a phenotype or morphological variant of asymmetric hypertrophic cardiomyopathy (HCM) characterized by hypertrophy in the midventricular segment that might result in midventricular obstruction.
Epidemiology
Midventricular hypertrophic cardiomyopathy...
Article
Concentric hypertrophic cardiomyopathy
Concentric or symmetric hypertrophic cardiomyopathy is a morphological variant or phenotype of hypertrophic cardiomyopathy (HCM) characterized by fairly symmetrical or diffuse thickening of the myocardium and a reduction of the left ventricular cavity.
Terminology
The term ‘concentric left ven...
Article
Air crescent (lung)
Air crescent describes the crescent of gas between an intra-cavitary mass and the cavity wall. The intra-cavitary mass may be due to necrotic tissue or a fungus ball 6.
Terminology
The descriptor Monod sign 2 is commonly used to describe the combination of a gas crescent and a mobile fungus ba...
Article
Chondromesenchymal hamartoma
Chondromesenchymal hamartomas are rare, benign, tumor-like nasal masses in children that have been associated with DICER1 mutations.
Epidemiology
The entity is rare: a systematic review of the literature in 2015 identified fewer than 50 reported cases 2. The mean age of presentation is 10 year...
Article
Head and neck squamous cell carcinomas
Head and neck squamous cell carcinomas (HNSCC) are the most common histologic type of head and neck cancer. While the term may include any squamous cell carcinoma of the head and neck, common usage focuses on those of mucosal origin, i.e., squamous cell carcinoma of the upper aerodigestive tract...
Article
CSF otorrhea
CSF otorrhea is defined as leakage of cerebrospinal fluid (CSF) from the subarachnoid space into the middle ear cavity or mastoid air cells and then out the ear via a perforation in the tympanic membrane or defect in the external ear.
Epidemiology
There are a number of underlying causes (see b...
Article
Pleura
The pleura (plural: pleurae) is an exceedingly delicate serous membrane which is arranged in the form of a closed invaginated sac that encloses the lungs and lines the thoracic cavity.
Gross anatomy
The pleura divides into:
visceral pleura which covers the surface of the lung and dips into th...
Article
Knee joint
The knee joint is a modified hinge joint between the femur, tibia, and patella. It is the largest synovial joint in the body and allows flexion and extension of the leg as well as some rotation in the flexed position.
Summary
location: two condylar joints between femur and tibia; saddle joint ...
Article
Mastoid part of temporal bone
The mastoid part of the temporal bone is its posterior component. The inferior conical projection of the mastoid part is called the mastoid process.
Gross anatomy
An irregular cavity within the anterosuperior aspect of the bone is called the mastoid (or tympanic) antrum, which communicates wit...
Article
Hypertrophic cardiomyopathy
Hypertrophic cardiomyopathy (HCM) is a type of cardiomyopathy defined by left ventricular hypertrophy which cannot otherwise be explained by another cardiac or systemic disease. It is the leading cause of sudden cardiac death in infants, teenagers, and young adults.
Terminology
Although hypert...
Article
Subacute invasive pulmonary aspergillosis
Subacute invasive pulmonary aspergillosis (previously known as chronic necrotizing aspergillosis or semi-invasive aspergillosis) is subacute to chronic localized and indolent form of invasive aspergillosis. It is also sometimes grouped under the term chronic pulmonary aspergillosis.
Epidemiolog...
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