Miliary TB

Miliary TB(좁쌀 결핵, 속립 결핵)은 주로 immunocompromised patients에서 TB가 massive lymphohematogenous dissemination 하는 질환이다.

Image findings

• innumerable well-defined solid randomly distributed micronodules(<3mm)
• sometimes upper lobe predominancy.
• additional findings
  • GGO, interlobular septal thickening and intralobular reticulation, mediastinal lymphadenopathy, pleural effusions

Differential diagnosis

• Other miliary infection such as fungal infection.
• Miliary sarcoidosis(diffuse sarcoidosis)
• Hematogenous metastasis
  • predominantly in the lung periphery & bases
  • often larger than a few millimeters