Clustered micronodules as predominant manifestation on CT: A sign of active but indolently evolving pulmonary tuberculosis.

Active pulmonary tuberculosis manifested predominantly as CMs in 2.6% of patients, with scarce of acid-fast bacilli smear-positivity and no association with impaired host immunity. CMs indolently progressed, accompanied by consolidation and small airway wall thickening, and originated from small nodules.