Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Two types of bronchiolar branching, cm and mm pattern, are demonstrated. Latter (boxed area) is morphological basis of tree-in-bud lesions in pulmonary tuberculosis. Extreme end of mm pattern is ballooned-out with fuzzy outline, which indicates alveolar ducts (circle).
