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Lobar pneumonia is a form of pneumonia characterized by inflammatory exudate within the intra-alveolar space resulting in consolidation that affects a large and continuous area of the lobe of a lung. [1] [2] It is one of three anatomic classifications of pneumonia (the other being bronchopneumonia and atypical pneumonia).
A lobar pneumonia is an infection that only involves a single lobe, or section, of a lung. Lobar pneumonia is often due to Streptococcus pneumoniae (though Klebsiella pneumoniae is also possible.) [16] Multilobar pneumonia involves more than one lobe, and it often causes a more severe illness.
The global economic cost of community-acquired pneumonia has been estimated at $17 billion annually. [24] Other estimates are considerably higher. In 2012 the estimated aggregate costs of treating pneumonia in the United States were $20 billion; [166] the median cost of a single pneumonia-related hospitalization is over $15,000. [167]
It is often contrasted with lobar pneumonia; but, in clinical practice, the types are difficult to apply, as the patterns usually overlap. [2] Bronchopneumonia (lobular) often leads to lobar pneumonia as the infection progresses. The same organism may cause one type of pneumonia in one patient, and another in a different patient.
The lung tissue lies within the same visceral pleura as the lobe in which it occurs. [1] Males and females are equally affected. [1] The arterial supply is usually derived from the lower thoracic or upper abdominal aorta. Venous drainage is usually to the left atrium via pulmonary veins establishing a left to left shunt.
Pneumonia as seen on chest X-ray. A: Normal chest X-ray. B: Abnormal chest X-ray with consolidation from pneumonia in the right lung, middle or inferior lobe (white area, left side of image). Specialty: Pulmonology
Size: larger size confers a higher risk of cancer [8] Location: Upper lobe location is a risk factor for cancer, while a location close to a fissure or the pleura indicates a benign lymph node, [8] especially if having a triangular shape. [9] Margin morphology: a spiculated margin is a risk factor for cancer. [8]
A routine chest X-ray is not always necessary for people who have symptoms of a lower respiratory tract infection. [4] Influenza affects both the upper and lower respiratory tracts. [citation needed] Antibiotics are the first line treatment for pneumonia; however, they are neither effective nor indicated for parasitic or viral infections. Acute ...