All of the following are pathologic features of primary tuberculosis, EXCEPT:: (A) Cavitation, (B) Caseation, (C) Calcification, (D) Langerhans giant cell
Answer is A. Primary TB is a form of disease that develops in a previously unexposed, and therefore unsensitized person. Secondary TB is the pattern of disease that arises in a previously sensitized host. Cavitation occurs in secondary TB. The caseous necrosis occurring in primary TB is conveed into a cavity in secondary TB. Ref: Robbins Pathologic Basis of Disease, 6th Edition, Pages 723-4