Items tagged “stubs”
35 results found
Article
Left upper lobe superior lingular segment
The left upper lobe superior lingular segment is one of the four bronchopulmonary segments of the left upper lobe. It lies below the apicoposterior and anterior segments of the left upper lobe.
Article
Left upper lobe inferior lingular segment
The left upper lobe inferior lingular segment is one of the four bronchopulmonary segments of the left upper lobe. It lies below the superior lingular segment of the left upper lobe.
Article
Heart chambers
There are four heart chambers, the right atrium, left atrium, right ventricle and left ventricle. These receive blood from the body and lungs and contract to transmit blood to the lungs for oxygenation and to the body for use in metabolism.
It is best to list the four chambers in order of the s...
Article
Multiple placental cysts
Multiple placental cystic spaces can be seen in many conditions:
within the placenta
venous lakes
true placental cysts
allantoic ducts cysts
hydropic degeneration of placenta
placental mesenchymal dysplasia
adjacent the placenta
subchorionic/retroplacental hematoma
subamniotic hematomas...
Article
Ring shadow (disambiguation)
Ring shadows are radiographic signs seen on either chest x-rays or on upper gastrointestinal fluoroscopy:
ring shadow (chest)
ring shadow (abdomen)
Article
Ductus venosus
Ductus venosus (DV) is a narrow, trumpet-shaped vessel which is seen in the fetal liver connecting the umbilical vein directly to the caudal inferior vena cava or distal left hepatic vein. The vessel plays a critical role in the fetal circulation by shunting oxygenated and nutrient-rich umbilica...
Article
Omphalopagus
Omphalopagus twins are joined at the front and at the level of the umbilicus.
Commonly involved structures are lower thorax fusion and liver fusion. Pericardium may be common, but the heart is never shared. Stomach and the proximal small intestines are usually separate but the small intestines ...
Article
Thoracopagus conjoined twins
Thoracopagus conjoined twins are, as the name suggests, conjoined twins united at their thorax. Thoracopagus and thoraco-omphalopagus form the most common forms of conjoined twins 3.
Fusion is typically face-to-face, at the upper thorax to the umbilicus with a common sternum, diaphragm, and upp...
Article
Pygopagus
Pygopagus twins are conjoined twins that are joined in the dorsal aspect, facing away from each other.
They share the sacrococcygeal and perineal regions. Fusion of sacrum and coccyx frequently occurs. The dura and the spinal cords may be fused in as many as 1/3rd of the cases. The anus, rectum...
Article
Rachipagus
Rachipagus twins are an extremely rare type of conjoined twins. They are joined in the dorsal aspect and face away from each other.
Fusion of the occiput with varying segments of the vertebral column may occur, resulting in the sharing of the spinal cords. The fusion terminates above the sacrum...
Article
Cephalopagus
Cephalopagus twins are a rare type of conjoined twins. They are fused from the vertex to the umbilicus. They share a common cranium with either one composite face or two faces on opposite sides of the conjoined head.
The thoraces are fused with fusion of liver, heart, and the upper gastrointest...
Article
Marjolin ulcer
Marjolin ulcers reflect malignant degeneration within pre-existing scars or areas of chronic inflammation such as burns or venous ulcers.
Epidemiology
Incidence is around 1-2% from all burn scars 1,2. The average latency period between initial injury to malignant transformation is 30-35 years....
Article
Prostatectomy
Prostatectomy is a common procedure to remove the prostate gland, most often for prostate adenocarcinoma, although occasionally performed for benign prostatic hyperplasia. When performed for tumor, it is only indicated for tumors that are confined to the prostate.
There are two main types of pr...
Article
Photon starvation
Photon starvation is one source of streak artifact which may occur in CT. It is seen in high attenuation areas, particularly behind metal implants. Because of high attenuation, insufficient photons reach the detector. During the reconstruction process, the noise is greatly magnified in these are...
Article
Schuller's view
Schuller's view is a oblique radiographic projection used to demonstrate the petrous temporal bone, internal auditory canal and bony labyrinth. It has an increasingly limited role in contemporary clinical practice because of the universal use of CT and MRI for imaging the temporal bone.
Patien...
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