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Transcript
Pathologic features of secondary tuberculosis:
• In secondary pulmonary tuberculosis, the lesions
involves
– the apices of both lungs and
– appear grossly as sharply circumscribed firm areas
•
with central caseation and cavitation surrounded by fibrous
wall.
• It can heal by fibrosis leaving a residual apical
scar.
• Histologically, epithelioid granulomas with
central caseation and Langhan’s type giant cells.