What is a lobar sign?
If the alveolar infiltrate abuts the lung margins, then there will be a lobar sign, which is the appearance of a soft tissue opaque lung abutting normal air-filled lung. Differential diagnoses for an alveolar pattern are mostly the same as those for an interstitial pattern.
What is an alveolar pattern?
An alveolar pattern is defined by the existence of more or less broad portions of the lung more opaque than normal due to partial or complete alveolar filling. With a few exceptions, the pulmonary architecture is overall preserved, and, if signs of interstitial involvement are present, they are not prevalent.
What causes alveolar lung pattern?
There are 4 pulmonary patterns described. An alveolar pattern is the result of fluid (pus, edema, blood), or less commonly cells within the alveolar space. A total collapse of the alveoli (atelectasis) leads to a similar appearance.
What does chest xray consolidation look like?
Lung consolidation is most easily seen on an X-ray. The consolidated parts of your lung look white, or opaque, on a chest X-ray. The way the consolidation is distributed on your X-ray may help your doctor figure out the cause, but other tests are almost always needed.
What causes a lobar sign?
2. Lobar sign: occurs when infiltrate (opacity) extends to periphery of lung lobe, and stops abruptly, leaving a dramatic transition between opacified lobe border and adjacent normal radiolucent lobe.
What is interstitial pattern?
An interstitial lung pattern is a regular descriptive term used when reporting a plain chest radiograph. It is the result of the age-old attempt to make the distinction between an interstitial and airspace (alveolar) process to narrow the differential diagnosis.
What is Caudodorsal?
(anatomy) Near the back of the tail. adjective.
What is lobar consolidation?
Lobar consolidation is the term used to describe consolidation in one of the lobes of the lung. It infers an alveolar spread of disease and is most commonly due to pneumonia.
What type is lobar pneumonia?
Lobar pneumonia, also known as non-segmental pneumonia or focal non-segmental pneumonia 7, is a radiological pattern associated with homogeneous and fibrinosuppurative consolidation of one or more lobes of a lung in response to bacterial pneumonia.
What is honeycomb lung?
In pathology, honeycomb lung refers to the characteristic appearance of variably sized cysts in a background of densely scarred lung tissue. Microscopically, enlarged airspaces surrounded by fibrosis with hyperplastic or bronchiolar type epithelium are present.
What is a reticular pattern?
The reticular appearance refers to a collection of innumerable small linear opacities that together produce an appearance resembling a “net”. The pattern can be fine, medium or coarse. Fine and medium patterns are shown here. Reticular patterns represent interstitial lung disease.
What is Bronchointerstitial?
Inflammation of lung parenchyma characterized by consolidation of affected part, alveolar air spaces being filled with exudate, inflammatory cells, and fibrin.
How can you tell the difference between VD and DV?
A DV view is less stressful, and should be used over the VD view. On DV views, the diaphragm appears as a single, smooth, “hump”, and the caudal lung lobes are narrow and taper. The caudal pulmonary arteries and veins are better visualized due to better caudal lung lobe inflation and magnification.