High-resolution CT appearance of miliary tuberculosis

Area of Science:

• Radiology
• Pulmonology
• Infectious Diseases

Background:

• Miliary tuberculosis is a severe form of tuberculosis characterized by widespread dissemination of Mycobacterium tuberculosis.
• Accurate and early diagnosis is crucial for effective treatment and improved patient outcomes.

Purpose of the Study:

• To define the spectrum of abnormalities associated with miliary tuberculosis on high-resolution CT (HRCT).
• To assess the diagnostic contribution of HRCT in evaluating lung parenchymal involvement in miliary tuberculosis.

Main Methods:

• Retrospective review of HRCT scans from 11 patients with confirmed miliary tuberculosis.
• Analysis of imaging findings, including nodule characteristics, distribution, and associated opacities.

Main Results:

• HRCT revealed uniformly distributed small nodules (1-4 mm) in the lungs of 10 out of 11 patients.
• Nodules were sharply or poorly defined, with a random distribution within secondary lobules.
• HRCT detected miliary nodules in one patient where chest radiography was negative.
• Additional findings included reticular opacities and ground-glass attenuation in some patients.

Conclusions:

• HRCT can suggest miliary tuberculosis in clinically appropriate cases.
• HRCT is valuable for detecting miliary nodules in lung parenchyma, particularly when chest radiography findings are inconclusive.