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Why is tuberculosis more commonly present at the apex of lungs

A 35-year-old member asked:
Dr. Stephen Siegel
38 years experience Pulmonology
More oxygen at apex: There is more ventilation and less blood flow at the apex of the lung. Since tuberculosis is a strict aerobe it grows better in the better oxygenated ... Read More

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A member asked:
Dr. Ayisha Gani
Specializes in Internal Medicine
Pneumonia: Consolidation is the change happens with pneumonia caused by any infectious agent, the picture and location may vary depending upon the type of the bu ... Read More
A 45-year-old member asked:
Dr. Ed Friedlander
44 years experience Pathology
Scar: Cancer grows while a scar stays stable or contracts. Old scars may be from old pneumonia, old tb, old thromboembolic disease, or (especially here in k ... Read More
Dr. Michael Sanders
16 years experience Pulmonology
See below: A scar is usually nothing to worry about. However, cancers can form in scars - actually just saw a patient with this yesterday. TB can cause scars a ... Read More
A 38-year-old member asked:
Dr. Sunil Mehra
44 years experience Pulmonology
May be: Infiltrates could be pneumonia, atelectasis or fibrosis.If infiltrates are in upper lung fields, you should have sputum analysed for tuberculosis, if ... Read More
A 45-year-old member asked:
Dr. Travis Kidner
17 years experience Surgical Oncology
Consult: I would consult with a thoracic surgeon. Scars in the lungs can occur after a previous infection. As long as they remain stable in size, usually they ... Read More
A 18-year-old member asked:
Dr. Keegan Duchicela
14 years experience Family Medicine
Not always.: With latent tb, there can be no symptoms at all. You might just have a positive PPD (skin test). With active TB (of the lung), there's still a chance ... Read More
A 44-year-old member asked:
Dr. Lokesh Guglani
21 years experience Pediatric Pulmonology
Inhaled infection: Tb generally enters the body by inhalation of droplets that were coughed out by an infected person around you. Once you inhale the droplets containing ... Read More
A 40-year-old member asked:
Dr. Carlo Hatem
25 years experience Pulmonary Critical Care
Tb chances are good: It is quite unlikely to have both conditions at the same time. This makes therapy more challenging but doable. Cure from tuberculosis should be expect ... Read More
A 54-year-old female asked:
Dr. Gurmukh Singh
49 years experience Pathology
Unclear question: Examination of the tissue by a pathologist is the gold standard for diagnosis. However, an apical cavitary lesion in the lung should be treated as tub ... Read More
A 18-year-old female asked:
Dr. Alan Cohen
39 years experience Psychiatry
TB: Yes, it's called pott's disease. It is usually spread by the bloodstream from a source in the lungs(typically) or by ingestion orally.However, lung sy ... Read More
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